Post by LD50 on Feb 12, 2012 10:19:08 GMT -5
« Thread Started on Sept 15, 2011, 7:03pm »
Let's get it started.
There just like a small block chevy with two cyls missing.
You can use a V-8 distributer with a 6cyl HEI cap.Sounds like it wouldn't work but it does. There was a bunch of info and pics on the old site,anyone still have any?
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Re: 4.3 Chevy tips/tricks
« Reply #1 on Sept 15, 2011, 8:50pm »
if anyone has a list of aftermarket parts for these id like to no whats out there really looking for a crank....problem is ive seen one stroker crank that was really the stock crank modified, heard of oddfire cranks but i cant find any.....biggest tip of of all is keep these motors cool
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Re: 4.3 Chevy tips/tricks
« Reply #2 on Sept 16, 2011, 1:47am »
Get a few good tips in here & I'll sticky it back up there with the 2.3 thread where it belongs.
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Re: 4.3 Chevy tips/tricks
« Reply #3 on Sept 16, 2011, 11:00am »
Why did you say keep em cool widefrikenopen? If there just like a sbc then they should be fine if they get hot.
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Re: 4.3 Chevy tips/tricks
« Reply #4 on Sept 16, 2011, 1:21pm »
They sre similiar to a small block chevy however nt the same a 4.3 is a even fire motor the rod journal size is different block cannot be bored more the 40 over or atleast I wouldn't recommend it but when these motor get hot they start going south in a hurry lack of power hard starting short derbies this motors are the way to go real long runs the 2.3 hass the advantage...atleast for now until I get these 4.3s figured out and bulletproof
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Re: 4.3 Chevy tips/tricks
« Reply #5 on Sept 16, 2011, 9:44pm »
Started working on mine today,if you grind out the TBI intake and redrill the bolt holes you can bolt on a rochester 2bbl.
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Re: 4.3 Chevy tips/tricks
« Reply #6 on Sept 17, 2011, 6:43pm »
Sept 16, 2011, 9:44pm, ron17t wrote:
Started working on mine today,if you grind out the TBI intake and redrill the bolt holes you can bolt on a rochester 2bbl.
;D r you just get a 4.3 4 bbl intake and bolt the intake on and put a 2 bbl apt. on it
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Re: 4.3 Chevy tips/tricks
« Reply #7 on Sept 17, 2011, 7:21pm »
It really didn't take long to fit up the carb,the intake was aluminum.
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Re: 4.3 Chevy tips/tricks
« Reply #8 on Sept 18, 2011, 1:02am »
Nice tip ron....one I will likely use when/if I build my 4.3
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Re: 4.3 Chevy tips/tricks
« Reply #9 on Sept 18, 2011, 9:57pm »
Anybody else run the chevy 3.8?? I have good luck with mine. Anybody know if i can take vortec head from a 90's 4.3 and bolt them up to a 3.8??
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Re: 4.3 Chevy tips/tricks
« Reply #10 on Sept 19, 2011, 10:08pm »
how do you adjust the valve on these motors and will a eldelbrock 650 work fine on these
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Re: 4.3 Chevy tips/tricks
« Reply #11 on Sept 20, 2011, 7:45am »
Sept 19, 2011, 10:08pm, krazy-k wrote:
how do you adjust the valve on these motors and will a eldelbrock 650 work fine on these
zero lash then 1/2turn, just like a sbc, 650 will work but you will prob need to drop the jetting down.
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Re: 4.3 Chevy tips/tricks
« Reply #12 on Sept 20, 2011, 4:32pm »
HEI distributer-if running one off a v-8 is there more to it than just switching the cap looking to buy msd for a v8 and swap the cap but dont wanna spend the money if its not gonna work...thanks
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Re: 4.3 Chevy tips/tricks
« Reply #13 on Sept 20, 2011, 6:28pm »
[image] my 95 vortec 4.3 in a volvo wagon loved it ran great till roter button broke.
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Re: 4.3 Chevy tips/tricks
« Reply #14 on Sept 20, 2011, 8:27pm »
I will be trying out the distributer soon. From the old site-you just use a v-8 distributer and a 6 cyl hei cap. It doesn't sound like it would work but I guess it does.
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Re: 4.3 Chevy tips/tricks
« Reply #15 on Sept 20, 2011, 10:58pm »
what is the advantages of using a v8 dist as apposed to a the v6 hei?
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Re: 4.3 Chevy tips/tricks
« Reply #16 on Sept 21, 2011, 11:41am »
Sept 20, 2011, 8:27pm, ron17t wrote:
I will be trying out the distributer soon. From the old site-you just use a v-8 distributer and a 6 cyl hei cap. It doesn't sound like it would work but I guess it does.
It does work that is how I have mine done.
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Re: 4.3 Chevy tips/tricks
« Reply #17 on Sept 21, 2011, 12:03pm »
i have a chance to buy a 4.3 tbi (non vortec) what al needs to be changed to but a carb on it? also what trans fits behind them.
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Re: 4.3 Chevy tips/tricks
« Reply #18 on Sept 21, 2011, 3:52pm »
Regular Chevy bell. Any transmission that came off of a V8 Chevy, any other 4.3 or 3.8 Chevy, old school iron duke, And pretty sure the straight 6's had it, too.
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Re: 4.3 Chevy tips/tricks
« Reply #19 on Sept 21, 2011, 5:57pm »
thanks c4... any thought on putting the a carb on it.
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Re: 4.3 Chevy tips/tricks
« Reply #20 on Sept 21, 2011, 6:04pm »
I guess yours is throttle body? Remove throttle body,set rochester base gasket over the holes where the throttle body was on the intake trace it out with a marker mark the bolt holes. Drill and tap new bolt holes,grind intake with a die grinder until the throttle plates on the carb will open.
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Re: 4.3 Chevy tips/tricks
« Reply #21 on Sept 21, 2011, 11:28pm »
ok so i go next monday or tuseday to pick up my new 4.3 tbi engine....just some qusetions..
1. what carb do you guys like to use.
2.do you add a carb spacer i know some motors it make them easier to light when they get hot.
3. how would you build a cardle for one of these motors il be putting it in a 87 volvo wagon.
thanks for all your help.
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Re: 4.3 Chevy tips/tricks
« Reply #22 on Sept 22, 2011, 7:01pm »
holley 500 carb spacer doesnt hurt and a small block chevy cradle bolts up perfectly
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Re: 4.3 Chevy tips/tricks
« Reply #23 on Sept 22, 2011, 7:22pm »
Sept 20, 2011, 10:58pm, sada4 wrote:
what is the advantages of using a v8 dist as apposed to a the v6 hei?
Availability, alot of demo guys got a sbc hei distributor sitting around, then all you need is the $10 cap
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Re: 4.3 Chevy tips/tricks
« Reply #24 on Sept 22, 2011, 7:25pm »
Sept 21, 2011, 3:52pm, C4 wrote:
Regular Chevy bell. Any transmission that came off of a V8 Chevy, any other 4.3 or 3.8 Chevy, old school iron duke, And pretty sure the straight 6's had it, too.
I had to modify a straight six bell housing to bolt up a sbc in a driver gmc truck something with how the starter bolted up.
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Re: 4.3 Chevy tips/tricks
« Reply #25 on Sept 22, 2011, 7:52pm »
An aftermarket v-8 gear reduction starter bolts right up.
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Re: 4.3 Chevy tips/tricks
« Reply #26 on Sept 22, 2011, 8:09pm »
Sept 22, 2011, 7:25pm, runinoutofgas wrote:
Sept 21, 2011, 3:52pm, C4 wrote:
Regular Chevy bell. Any transmission that came off of a V8 Chevy, any other 4.3 or 3.8 Chevy, old school iron duke, And pretty sure the straight 6's had it, too.
I had to modify a straight six bell housing to bolt up a sbc in a driver gmc truck something with how the starter bolted up.
older truck bellhousing had a 3 bolt starter nosecone that bolted the starter to bell instead of block.
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Re: 4.3 Chevy tips/tricks
« Reply #27 on Sept 22, 2011, 8:59pm »
Sept 22, 2011, 8:09pm, smashbob12 wrote:
Sept 22, 2011, 7:25pm, runinoutofgas wrote:
I had to modify a straight six bell housing to bolt up a sbc in a driver gmc truck something with how the starter bolted up.
older truck bellhousing had a 3 bolt starter nosecone that bolted the starter to bell instead of block.
Both good details to know. Thanks for sharing!
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Re: 4.3 Chevy tips/tricks
« Reply #28 on Sept 24, 2011, 8:08am »
ran my 4.3 again last night in a 74 Chrysler with 4.78s out back...... had plenty of power but didnt take the heat well.....gonna get another one and try it again
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Re: 4.3 Chevy tips/tricks
« Reply #29 on Sept 24, 2011, 9:01am »
derby666 is your 4.3 stock? also if your running a temp gauge at what temp did the 4.3 start to go down hill.....just curious thanks
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Re: 4.3 Chevy tips/tricks
« Reply #30 on Sept 24, 2011, 9:20am »
Sept 18, 2011, 9:57pm, Vitolizer324 wrote:
Anybody else run the chevy 3.8?? I have good luck with mine. Anybody know if i can take vortec head from a 90's 4.3 and bolt them up to a 3.8??
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Re: 4.3 Chevy tips/tricks
« Reply #31 on Sept 24, 2011, 5:13pm »
im not 100 percent sure but i do believe they will not swap over. a 4.3 and a 3.8 is a completly different block I checked into it awhile back because there is aftermarket cranks avaible for the 3.8 but not much out there the the 4.3 so i was hopin i could swap cranks....nope not so much lol
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Re: 4.3 Chevy tips/tricks
« Reply #32 on Sept 26, 2011, 8:59pm »
so i got my 4.3 today got most of the junk off of it. just a question are you guys running tachs? what kind of rpm you turning. also what acc u run? just a waterpump or alt too? is it hard to wire the alt up?
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Re: 4.3 Chevy tips/tricks
« Reply #33 on Sept 26, 2011, 10:32pm »
GM 3 wire alternator.....twist all 3 together (one of the small ones don't matter, but I never remember which one), run through a toggle, then to + side of battery. I also install a hefty fusible link fairly close to the switch.
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Re: 4.3 Chevy tips/tricks
« Reply #34 on Sept 30, 2011, 3:57pm »
Sept 24, 2011, 5:13pm, widefrickenopen wrote:
im not 100 percent sure but i do believe they will not swap over. a 4.3 and a 3.8 is a completly different block I checked into it awhile back because there is aftermarket cranks avaible for the 3.8 but not much out there the the 4.3 so i was hopin i could swap cranks....nope not so much lol
Dammit..
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Re: 4.3 Chevy tips/tricks
« Reply #35 on Oct 10, 2011, 4:29pm »
dose anyone know what the block numbers on 4.3s are
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Re: 4.3 Chevy tips/tricks
« Reply #36 on Oct 12, 2011, 6:52am »
stock 4.3, this motor had issues the 1st time I ran it getting hot quick but it was the same setup in a 77 Caddi that was under full throttle beating almost the whole time lol , then sat a year before i threw it in the Chrysler a week before showtime .......at Idle would stay around 195 but when you started opening her up on the track it would jump up pretty quick....ended up chuggin and dieing at about 290 which was less than a 20 minute heat .....truck that it came out of had over 200,000 on it but not sure if the motor was a rebuild because it was alot tighter than any 200,000 Motor ive messed with .....quite possibly the below statement didnt help one bit either
lol
one major thing that I think doomed this motor right off the bat was that it was a test motor that I just took out of a truck sitting down back of my dads shop for the whole spring and summer with no hood on it and had no intake on it and water literally filled the whole motor .All I did was threw an intake and carb on, pulled plugs, poured oil in the cylinders, changed oil and put a tune up on it and went with it.......mainly wanted to see if it was something I liked before I did anything else to one and if it could take constant higher RPMs..... and it was a free motor so had nothing into it if it failed
Sept 24, 2011, 9:01am, widefrickenopen wrote:
derby666 is your 4.3 stock? also if your running a temp gauge at what temp did the 4.3 start to go down hill.....just curious thanks
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Re: 4.3 Chevy tips/tricks
« Reply #37 on Oct 15, 2011, 4:40pm »
What point on a 6cyl hei cap is number one?
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Re: 4.3 Chevy tips/tricks
« Reply #38 on Oct 16, 2011, 6:12pm »
Which ever one you want. Just bring cyl 1 to top dead center,drop in the distributer and line up to a terminal on the cap,that will be number1 follow the firing order around the cap
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Re: 4.3 Chevy tips/tricks
« Reply #39 on Oct 17, 2011, 4:40pm »
Is anyone running the adjustable rev module and what are you setting ur rev limiters at
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Re: 4.3 Chevy tips/tricks
« Reply #40 on Oct 30, 2011, 6:55pm »
we-crash.proboards.com/index.cgi?action=display&board=parts&thread=7730
Just posted one for sale in used parts if someone is interested. Ohio
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Re: 4.3 Chevy tips/tricks
« Reply #41 on Oct 30, 2011, 8:49pm »
ive got a well built 4.3 a torque monster. My question I have a mustang I want to put it in but the rearend only has 2.73 gears what problems would I run into running that combo?
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Re: 4.3 Chevy tips/tricks
« Reply #42 on Oct 30, 2011, 9:34pm »
^^^^^^^^^With those gears, in derby situations, such as being hung up, pushing a front end around with a busted tie rod, flat tires, metal dragging on tires, etc., you'll burn up automatic trannsmissions or stock type clutches on manual trannies. Might get lucky once, or even a few times.....but it WILL happen.
Also, the steeper your gears are, the less noticable your lack of power will be when you start having problems. The higher that ratio number is, the less your engine has to work to do the same job.
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Re: 4.3 Chevy tips/tricks
« Reply #43 on Oct 31, 2011, 7:34am »
Oct 30, 2011, 9:34pm, C4 wrote:
^^^^^^^^^With those gears, in derby situations, such as being hung up, pushing a front end around with a busted tie rod, flat tires, metal dragging on tires, etc., you'll burn up automatic trannsmissions or stock type clutches on manual trannies. Might get lucky once, or even a few times.....but it WILL happen.
Also, the steeper your gears are, the less noticable your lack of power will be when you start having problems. The higher that ratio number is, the less your engine has to work to do the same job.
just what I needed to know thanks
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Re: 4.3 Chevy tips/tricks
« Reply #44 on Nov 6, 2011, 8:39pm »
i am wondering how to make headers for the 4.3 & dont want to buy some
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Re: 4.3 Chevy tips/tricks
« Reply #45 on Nov 7, 2011, 9:15am »
some 80s trucks with the 4.3 had steel manifolds on them.....pretty easy to fab some up from them, thats what I did for mine
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Re: 4.3 Chevy tips/tricks
« Reply #46 on Nov 7, 2011, 7:17pm »
i have a 1992 4.3
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Re: 4.3 Chevy tips/tricks
« Reply #47 on Nov 20, 2011, 1:50pm »
ok i have a question. how does a hei distributor from a v8 work in a v6. there has to be something else that needs to be changed. i dont see how u can just put on a v6 hei cap.
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Re: 4.3 Chevy tips/tricks
« Reply #48 on Nov 21, 2011, 7:05pm »
It works just fine all that's need is the 6cyl cap
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Re: 4.3 Chevy tips/tricks
« Reply #49 on Nov 21, 2011, 9:53pm »
A stock 4.3 cap looks just like a V8 cap, with 2 of the little tits plugged with plastic.
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Re: 4.3 Chevy tips/tricks
« Reply #50 on Nov 25, 2011, 2:53pm »
Sept 20, 2011, 6:28pm, dirty55 wrote:
[image] my 95 vortec 4.3 in a volvo wagon loved it ran great till roter button broke.
how did you do your headers & howd that wagon hold up?
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Re: 4.3 Chevy tips/tricks
« Reply #51 on Nov 25, 2011, 7:18pm »
The headers are just old SBC cut so there single. The wagon did good wasent allowed to build like I wanted so left rear corner bent a lil weird not bad I had some bigger cars in heat a six Banger Dippy and box Chevy with 3.8 . The 4.3 ran great till roter button exploded.
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Re: 4.3 Chevy tips/tricks
« Reply #52 on Nov 27, 2011, 2:25pm »
Hope this helps some of u guys out there. U can get a 4.3 hei distributor off ebay for around 50 bucks plus shipping.And DEC headers make a good set of headers for around 150.00 for them. And to the guys asking about the 3.8 mtr. If anyone had info on them. I ran one for 2 years in about 12 to 15 derbys and had great luck several 1st,2nd,and 3rd place finishes. As far as some things. Such as the heads, intakes and distributors u can change them from a 4.3 to the 3.8 aswell as the cams I found this out on accident. I ordered stuff for a 4.3 I was building and when I got the stuff I realized I had a 3.8 and I called crane cams and they told me the stuff would not work. I checked every thing with calipers and it all was the same as the stock cam out of the 3.8 So I put it together and ran it several times until it finally blew on me at a race that was more like a mud run then a derby. I had to hold it to the floor for a good 20 mins to keep from getting stuck hope this helps some of u guys.
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Re: 4.3 Chevy tips/tricks
« Reply #53 on Nov 27, 2011, 3:19pm »
Nov 27, 2011, 2:25pm, LT1 wrote:
Hope this helps some of u guys out there. U can get a 4.3 hei distributor off ebay for around 50 bucks plus shipping.And DEC headers make a good set of headers for around 150.00 for them. And to the guys asking about the 3.8 mtr. If anyone had info on them. I ran one for 2 years in about 12 to 15 derbys and had great luck several 1st,2nd,and 3rd place finishes. As far as some things. Such as the heads, intakes and distributors u can change them from a 4.3 to the 3.8 aswell as the cams I found this out on accident. I ordered stuff for a 4.3 I was building and when I got the stuff I realized I had a 3.8 and I called crane cams and they told me the stuff would not work. I checked every thing with calipers and it all was the same as the stock cam out of the 3.8 So I put it together and ran it several times until it finally blew on me at a race that was more like a mud run then a derby. I had to hold it to the floor for a good 20 mins to keep from getting stuck hope this helps some of u guys.
Badass, Now i'm going to start throwing money into my 3.8.
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Re: 4.3 Chevy tips/tricks
« Reply #54 on Nov 27, 2011, 5:34pm »
i have a 3.8 in one of my cars and it works pretty darn good. i am also building a 4.3 for another one of my cars.
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Re: 4.3 Chevy tips/tricks
« Reply #55 on Nov 27, 2011, 6:19pm »
All my dad and i run is 3.8's. He's won over 2k with his in the past 5 years, and his is still kinda stock.
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Re: 4.3 Chevy tips/tricks
« Reply #56 on Nov 28, 2011, 8:04pm »
Hey guys I found a website with great info. I don't know if it's been said before.
www.hotsixes.com/index.php?option....id=14&Itemid=12
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Re: 4.3 Chevy tips/tricks
« Reply #57 on Nov 30, 2011, 7:31pm »
will a 2 barrel motorcraft 500cf over load the 4.3
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Re: 4.3 Chevy tips/tricks
« Reply #58 on Dec 3, 2011, 8:45pm »
i ran a holley 500 cfm and liked it. Got a question does anybody no where I can get a aftermarket crankshaft for a 4.3, the only ones ive found is a scat oem replacement or a altered stock 4.3 crank thats a so called stroker crank,I dont trust it.
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Re: 4.3 Chevy tips/tricks
« Reply #59 on Dec 4, 2011, 11:18am »
I've got a pretty much stock 4.3 and a turbo 350 trans my question is what gear would be better my 4.10 or my 5.62 all my local tracks are pretty small
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Re: 4.3 Chevy tips/tricks
« Reply #60 on Dec 4, 2011, 11:31am »
4.88 or 5.10 is what I would recommend for gears
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Re: 4.3 Chevy tips/tricks
« Reply #61 on Dec 4, 2011, 11:49am »
I use 4:10's with my 3.8, My tracks are pretty small as well.
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Re: 4.3 Chevy tips/tricks
« Reply #62 on Dec 4, 2011, 2:04pm »
here are a few tips i have found for this motor that will swap over from a 350. cam bearings, main bearings,pistons, valvetrain parts, timing cover, oil pump, and front dress. im grabbing one to power my car hoping i wont have traction issues with my 7.5 stock rear gears welded solid with tractor lugs.
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Re: 4.3 Chevy tips/tricks
« Reply #63 on Dec 18, 2011, 10:19pm »
To the guy who asked about gear ratios. I would say go with 4.56s.If u run small tracks it will work perfect. It would be low enough to pick up speed quick but not low enough to rap your mtr out when your going for a full track shot.
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Re: 4.3 Chevy tips/tricks
« Reply #64 on Dec 24, 2011, 10:03pm »
what about 3..73 gears with a chain saw 3-speed???
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Re: 4.3 Chevy tips/tricks
« Reply #65 on Dec 24, 2011, 10:10pm »
you no what ratio you 3speed is i think it would depend on if the tranny was a 0 grove or on up to a 3 or 4 grove i believe, never ran a 3speed but always wanted to but i would base your rear gears off of how you first gear is in your car, lol prolly dont help much
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Re: 4.3 Chevy tips/tricks
« Reply #66 on Dec 25, 2011, 2:06pm »
ill get 2 test it when i can get the broken bolt out of the egr setup and get it blocked off
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Re: 4.3 Chevy tips/tricks
« Reply #67 on Jan 1, 2012, 11:54pm »
couple questions........just got a 4.3 , someone stuck it in a 80s blazer that originally had a 2.8 so not sure what it originally came out of.....................has black plastic center bolt valve covers stamped vortec, block #s are 4.3 LG from left to right backside of block behind dist...........2sg.........d297.......10066011
intake casting # is 14094011
have been trying to to decode it with little success.......from what ive read it says its a non vortec 87-94 tbi engine with no balance shaft , but does not really give any more info than that ...........and I guess the plastic centerbolt valve covers are throwing me off...............any ideas guys
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Re: 4.3 Chevy tips/tricks
« Reply #68 on Jan 2, 2012, 5:40pm »
Check www.hotsixes.com
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Re: 4.3 Chevy tips/tricks
« Reply #69 on Jan 15, 2012, 8:15pm »
Hey guys I read through all the building a 4.3 section, and i have a few more questions hopefully i didnt just miss the questions. So a regular v8 disributor will go right in a VORTEC 4.3 also? I know they will work in the tbi engines. Just not sure about the vortecs. Also, I can get a carb 4.3 MARINE vortec intake and carb. Any downside/upside to a marine carb? Thanks
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Re: 4.3 Chevy tips/tricks
« Reply #70 on Jan 17, 2012, 8:53am »
Jan 15, 2012, 8:15pm, junker00 wrote:
Hey guys I read through all the building a 4.3 section, and i have a few more questions hopefully i didnt just miss the questions. So a regular v8 disributor will go right in a VORTEC 4.3 also? I know they will work in the tbi engines. Just not sure about the vortecs. Also, I can get a carb 4.3 MARINE vortec intake and carb. Any downside/upside to a marine carb? Thanks
should be no prob's on the marine carb .but you can run anadapter to run a holley, or any other carb really.
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Re: 4.3 Chevy tips/tricks
« Reply #71 on Jan 18, 2012, 8:11pm »
also i have a non vortec 4.3.....would a 350 cfm be big enough? it is a stock engine. Or should I go with a 500 cfm?
Thanks
Let's get it started.
There just like a small block chevy with two cyls missing.
You can use a V-8 distributer with a 6cyl HEI cap.Sounds like it wouldn't work but it does. There was a bunch of info and pics on the old site,anyone still have any?
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Re: 4.3 Chevy tips/tricks
« Reply #1 on Sept 15, 2011, 8:50pm »
if anyone has a list of aftermarket parts for these id like to no whats out there really looking for a crank....problem is ive seen one stroker crank that was really the stock crank modified, heard of oddfire cranks but i cant find any.....biggest tip of of all is keep these motors cool
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Re: 4.3 Chevy tips/tricks
« Reply #2 on Sept 16, 2011, 1:47am »
Get a few good tips in here & I'll sticky it back up there with the 2.3 thread where it belongs.
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Re: 4.3 Chevy tips/tricks
« Reply #3 on Sept 16, 2011, 11:00am »
Why did you say keep em cool widefrikenopen? If there just like a sbc then they should be fine if they get hot.
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Re: 4.3 Chevy tips/tricks
« Reply #4 on Sept 16, 2011, 1:21pm »
They sre similiar to a small block chevy however nt the same a 4.3 is a even fire motor the rod journal size is different block cannot be bored more the 40 over or atleast I wouldn't recommend it but when these motor get hot they start going south in a hurry lack of power hard starting short derbies this motors are the way to go real long runs the 2.3 hass the advantage...atleast for now until I get these 4.3s figured out and bulletproof
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Re: 4.3 Chevy tips/tricks
« Reply #5 on Sept 16, 2011, 9:44pm »
Started working on mine today,if you grind out the TBI intake and redrill the bolt holes you can bolt on a rochester 2bbl.
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Re: 4.3 Chevy tips/tricks
« Reply #6 on Sept 17, 2011, 6:43pm »
Sept 16, 2011, 9:44pm, ron17t wrote:
Started working on mine today,if you grind out the TBI intake and redrill the bolt holes you can bolt on a rochester 2bbl.
;D r you just get a 4.3 4 bbl intake and bolt the intake on and put a 2 bbl apt. on it
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Re: 4.3 Chevy tips/tricks
« Reply #7 on Sept 17, 2011, 7:21pm »
It really didn't take long to fit up the carb,the intake was aluminum.
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Re: 4.3 Chevy tips/tricks
« Reply #8 on Sept 18, 2011, 1:02am »
Nice tip ron....one I will likely use when/if I build my 4.3
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Re: 4.3 Chevy tips/tricks
« Reply #9 on Sept 18, 2011, 9:57pm »
Anybody else run the chevy 3.8?? I have good luck with mine. Anybody know if i can take vortec head from a 90's 4.3 and bolt them up to a 3.8??
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Re: 4.3 Chevy tips/tricks
« Reply #10 on Sept 19, 2011, 10:08pm »
how do you adjust the valve on these motors and will a eldelbrock 650 work fine on these
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Re: 4.3 Chevy tips/tricks
« Reply #11 on Sept 20, 2011, 7:45am »
Sept 19, 2011, 10:08pm, krazy-k wrote:
how do you adjust the valve on these motors and will a eldelbrock 650 work fine on these
zero lash then 1/2turn, just like a sbc, 650 will work but you will prob need to drop the jetting down.
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Re: 4.3 Chevy tips/tricks
« Reply #12 on Sept 20, 2011, 4:32pm »
HEI distributer-if running one off a v-8 is there more to it than just switching the cap looking to buy msd for a v8 and swap the cap but dont wanna spend the money if its not gonna work...thanks
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Re: 4.3 Chevy tips/tricks
« Reply #13 on Sept 20, 2011, 6:28pm »
[image] my 95 vortec 4.3 in a volvo wagon loved it ran great till roter button broke.
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Re: 4.3 Chevy tips/tricks
« Reply #14 on Sept 20, 2011, 8:27pm »
I will be trying out the distributer soon. From the old site-you just use a v-8 distributer and a 6 cyl hei cap. It doesn't sound like it would work but I guess it does.
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Re: 4.3 Chevy tips/tricks
« Reply #15 on Sept 20, 2011, 10:58pm »
what is the advantages of using a v8 dist as apposed to a the v6 hei?
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Re: 4.3 Chevy tips/tricks
« Reply #16 on Sept 21, 2011, 11:41am »
Sept 20, 2011, 8:27pm, ron17t wrote:
I will be trying out the distributer soon. From the old site-you just use a v-8 distributer and a 6 cyl hei cap. It doesn't sound like it would work but I guess it does.
It does work that is how I have mine done.
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Re: 4.3 Chevy tips/tricks
« Reply #17 on Sept 21, 2011, 12:03pm »
i have a chance to buy a 4.3 tbi (non vortec) what al needs to be changed to but a carb on it? also what trans fits behind them.
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Re: 4.3 Chevy tips/tricks
« Reply #18 on Sept 21, 2011, 3:52pm »
Regular Chevy bell. Any transmission that came off of a V8 Chevy, any other 4.3 or 3.8 Chevy, old school iron duke, And pretty sure the straight 6's had it, too.
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Re: 4.3 Chevy tips/tricks
« Reply #19 on Sept 21, 2011, 5:57pm »
thanks c4... any thought on putting the a carb on it.
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Re: 4.3 Chevy tips/tricks
« Reply #20 on Sept 21, 2011, 6:04pm »
I guess yours is throttle body? Remove throttle body,set rochester base gasket over the holes where the throttle body was on the intake trace it out with a marker mark the bolt holes. Drill and tap new bolt holes,grind intake with a die grinder until the throttle plates on the carb will open.
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Re: 4.3 Chevy tips/tricks
« Reply #21 on Sept 21, 2011, 11:28pm »
ok so i go next monday or tuseday to pick up my new 4.3 tbi engine....just some qusetions..
1. what carb do you guys like to use.
2.do you add a carb spacer i know some motors it make them easier to light when they get hot.
3. how would you build a cardle for one of these motors il be putting it in a 87 volvo wagon.
thanks for all your help.
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Re: 4.3 Chevy tips/tricks
« Reply #22 on Sept 22, 2011, 7:01pm »
holley 500 carb spacer doesnt hurt and a small block chevy cradle bolts up perfectly
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Re: 4.3 Chevy tips/tricks
« Reply #23 on Sept 22, 2011, 7:22pm »
Sept 20, 2011, 10:58pm, sada4 wrote:
what is the advantages of using a v8 dist as apposed to a the v6 hei?
Availability, alot of demo guys got a sbc hei distributor sitting around, then all you need is the $10 cap
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Re: 4.3 Chevy tips/tricks
« Reply #24 on Sept 22, 2011, 7:25pm »
Sept 21, 2011, 3:52pm, C4 wrote:
Regular Chevy bell. Any transmission that came off of a V8 Chevy, any other 4.3 or 3.8 Chevy, old school iron duke, And pretty sure the straight 6's had it, too.
I had to modify a straight six bell housing to bolt up a sbc in a driver gmc truck something with how the starter bolted up.
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Re: 4.3 Chevy tips/tricks
« Reply #25 on Sept 22, 2011, 7:52pm »
An aftermarket v-8 gear reduction starter bolts right up.
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Re: 4.3 Chevy tips/tricks
« Reply #26 on Sept 22, 2011, 8:09pm »
Sept 22, 2011, 7:25pm, runinoutofgas wrote:
Sept 21, 2011, 3:52pm, C4 wrote:
Regular Chevy bell. Any transmission that came off of a V8 Chevy, any other 4.3 or 3.8 Chevy, old school iron duke, And pretty sure the straight 6's had it, too.
I had to modify a straight six bell housing to bolt up a sbc in a driver gmc truck something with how the starter bolted up.
older truck bellhousing had a 3 bolt starter nosecone that bolted the starter to bell instead of block.
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Re: 4.3 Chevy tips/tricks
« Reply #27 on Sept 22, 2011, 8:59pm »
Sept 22, 2011, 8:09pm, smashbob12 wrote:
Sept 22, 2011, 7:25pm, runinoutofgas wrote:
I had to modify a straight six bell housing to bolt up a sbc in a driver gmc truck something with how the starter bolted up.
older truck bellhousing had a 3 bolt starter nosecone that bolted the starter to bell instead of block.
Both good details to know. Thanks for sharing!
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Re: 4.3 Chevy tips/tricks
« Reply #28 on Sept 24, 2011, 8:08am »
ran my 4.3 again last night in a 74 Chrysler with 4.78s out back...... had plenty of power but didnt take the heat well.....gonna get another one and try it again
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Re: 4.3 Chevy tips/tricks
« Reply #29 on Sept 24, 2011, 9:01am »
derby666 is your 4.3 stock? also if your running a temp gauge at what temp did the 4.3 start to go down hill.....just curious thanks
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Re: 4.3 Chevy tips/tricks
« Reply #30 on Sept 24, 2011, 9:20am »
Sept 18, 2011, 9:57pm, Vitolizer324 wrote:
Anybody else run the chevy 3.8?? I have good luck with mine. Anybody know if i can take vortec head from a 90's 4.3 and bolt them up to a 3.8??
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Re: 4.3 Chevy tips/tricks
« Reply #31 on Sept 24, 2011, 5:13pm »
im not 100 percent sure but i do believe they will not swap over. a 4.3 and a 3.8 is a completly different block I checked into it awhile back because there is aftermarket cranks avaible for the 3.8 but not much out there the the 4.3 so i was hopin i could swap cranks....nope not so much lol
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Re: 4.3 Chevy tips/tricks
« Reply #32 on Sept 26, 2011, 8:59pm »
so i got my 4.3 today got most of the junk off of it. just a question are you guys running tachs? what kind of rpm you turning. also what acc u run? just a waterpump or alt too? is it hard to wire the alt up?
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Re: 4.3 Chevy tips/tricks
« Reply #33 on Sept 26, 2011, 10:32pm »
GM 3 wire alternator.....twist all 3 together (one of the small ones don't matter, but I never remember which one), run through a toggle, then to + side of battery. I also install a hefty fusible link fairly close to the switch.
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Re: 4.3 Chevy tips/tricks
« Reply #34 on Sept 30, 2011, 3:57pm »
Sept 24, 2011, 5:13pm, widefrickenopen wrote:
im not 100 percent sure but i do believe they will not swap over. a 4.3 and a 3.8 is a completly different block I checked into it awhile back because there is aftermarket cranks avaible for the 3.8 but not much out there the the 4.3 so i was hopin i could swap cranks....nope not so much lol
Dammit..
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Re: 4.3 Chevy tips/tricks
« Reply #35 on Oct 10, 2011, 4:29pm »
dose anyone know what the block numbers on 4.3s are
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Re: 4.3 Chevy tips/tricks
« Reply #36 on Oct 12, 2011, 6:52am »
stock 4.3, this motor had issues the 1st time I ran it getting hot quick but it was the same setup in a 77 Caddi that was under full throttle beating almost the whole time lol , then sat a year before i threw it in the Chrysler a week before showtime .......at Idle would stay around 195 but when you started opening her up on the track it would jump up pretty quick....ended up chuggin and dieing at about 290 which was less than a 20 minute heat .....truck that it came out of had over 200,000 on it but not sure if the motor was a rebuild because it was alot tighter than any 200,000 Motor ive messed with .....quite possibly the below statement didnt help one bit either
lolone major thing that I think doomed this motor right off the bat was that it was a test motor that I just took out of a truck sitting down back of my dads shop for the whole spring and summer with no hood on it and had no intake on it and water literally filled the whole motor .All I did was threw an intake and carb on, pulled plugs, poured oil in the cylinders, changed oil and put a tune up on it and went with it.......mainly wanted to see if it was something I liked before I did anything else to one and if it could take constant higher RPMs..... and it was a free motor so had nothing into it if it failed
Sept 24, 2011, 9:01am, widefrickenopen wrote:
derby666 is your 4.3 stock? also if your running a temp gauge at what temp did the 4.3 start to go down hill.....just curious thanks
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Re: 4.3 Chevy tips/tricks
« Reply #37 on Oct 15, 2011, 4:40pm »
What point on a 6cyl hei cap is number one?
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Re: 4.3 Chevy tips/tricks
« Reply #38 on Oct 16, 2011, 6:12pm »
Which ever one you want. Just bring cyl 1 to top dead center,drop in the distributer and line up to a terminal on the cap,that will be number1 follow the firing order around the cap
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Re: 4.3 Chevy tips/tricks
« Reply #39 on Oct 17, 2011, 4:40pm »
Is anyone running the adjustable rev module and what are you setting ur rev limiters at
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Re: 4.3 Chevy tips/tricks
« Reply #40 on Oct 30, 2011, 6:55pm »
we-crash.proboards.com/index.cgi?action=display&board=parts&thread=7730
Just posted one for sale in used parts if someone is interested. Ohio
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Re: 4.3 Chevy tips/tricks
« Reply #41 on Oct 30, 2011, 8:49pm »
ive got a well built 4.3 a torque monster. My question I have a mustang I want to put it in but the rearend only has 2.73 gears what problems would I run into running that combo?
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Re: 4.3 Chevy tips/tricks
« Reply #42 on Oct 30, 2011, 9:34pm »
^^^^^^^^^With those gears, in derby situations, such as being hung up, pushing a front end around with a busted tie rod, flat tires, metal dragging on tires, etc., you'll burn up automatic trannsmissions or stock type clutches on manual trannies. Might get lucky once, or even a few times.....but it WILL happen.
Also, the steeper your gears are, the less noticable your lack of power will be when you start having problems. The higher that ratio number is, the less your engine has to work to do the same job.
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Re: 4.3 Chevy tips/tricks
« Reply #43 on Oct 31, 2011, 7:34am »
Oct 30, 2011, 9:34pm, C4 wrote:
^^^^^^^^^With those gears, in derby situations, such as being hung up, pushing a front end around with a busted tie rod, flat tires, metal dragging on tires, etc., you'll burn up automatic trannsmissions or stock type clutches on manual trannies. Might get lucky once, or even a few times.....but it WILL happen.
Also, the steeper your gears are, the less noticable your lack of power will be when you start having problems. The higher that ratio number is, the less your engine has to work to do the same job.
just what I needed to know thanks
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Re: 4.3 Chevy tips/tricks
« Reply #44 on Nov 6, 2011, 8:39pm »
i am wondering how to make headers for the 4.3 & dont want to buy some
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Re: 4.3 Chevy tips/tricks
« Reply #45 on Nov 7, 2011, 9:15am »
some 80s trucks with the 4.3 had steel manifolds on them.....pretty easy to fab some up from them, thats what I did for mine
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Re: 4.3 Chevy tips/tricks
« Reply #46 on Nov 7, 2011, 7:17pm »
i have a 1992 4.3
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Re: 4.3 Chevy tips/tricks
« Reply #47 on Nov 20, 2011, 1:50pm »
ok i have a question. how does a hei distributor from a v8 work in a v6. there has to be something else that needs to be changed. i dont see how u can just put on a v6 hei cap.
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Re: 4.3 Chevy tips/tricks
« Reply #48 on Nov 21, 2011, 7:05pm »
It works just fine all that's need is the 6cyl cap
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Re: 4.3 Chevy tips/tricks
« Reply #49 on Nov 21, 2011, 9:53pm »
A stock 4.3 cap looks just like a V8 cap, with 2 of the little tits plugged with plastic.
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Re: 4.3 Chevy tips/tricks
« Reply #50 on Nov 25, 2011, 2:53pm »
Sept 20, 2011, 6:28pm, dirty55 wrote:
[image] my 95 vortec 4.3 in a volvo wagon loved it ran great till roter button broke.
how did you do your headers & howd that wagon hold up?
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Re: 4.3 Chevy tips/tricks
« Reply #51 on Nov 25, 2011, 7:18pm »
The headers are just old SBC cut so there single. The wagon did good wasent allowed to build like I wanted so left rear corner bent a lil weird not bad I had some bigger cars in heat a six Banger Dippy and box Chevy with 3.8 . The 4.3 ran great till roter button exploded.
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Re: 4.3 Chevy tips/tricks
« Reply #52 on Nov 27, 2011, 2:25pm »
Hope this helps some of u guys out there. U can get a 4.3 hei distributor off ebay for around 50 bucks plus shipping.And DEC headers make a good set of headers for around 150.00 for them. And to the guys asking about the 3.8 mtr. If anyone had info on them. I ran one for 2 years in about 12 to 15 derbys and had great luck several 1st,2nd,and 3rd place finishes. As far as some things. Such as the heads, intakes and distributors u can change them from a 4.3 to the 3.8 aswell as the cams I found this out on accident. I ordered stuff for a 4.3 I was building and when I got the stuff I realized I had a 3.8 and I called crane cams and they told me the stuff would not work. I checked every thing with calipers and it all was the same as the stock cam out of the 3.8 So I put it together and ran it several times until it finally blew on me at a race that was more like a mud run then a derby. I had to hold it to the floor for a good 20 mins to keep from getting stuck hope this helps some of u guys.
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Re: 4.3 Chevy tips/tricks
« Reply #53 on Nov 27, 2011, 3:19pm »
Nov 27, 2011, 2:25pm, LT1 wrote:
Hope this helps some of u guys out there. U can get a 4.3 hei distributor off ebay for around 50 bucks plus shipping.And DEC headers make a good set of headers for around 150.00 for them. And to the guys asking about the 3.8 mtr. If anyone had info on them. I ran one for 2 years in about 12 to 15 derbys and had great luck several 1st,2nd,and 3rd place finishes. As far as some things. Such as the heads, intakes and distributors u can change them from a 4.3 to the 3.8 aswell as the cams I found this out on accident. I ordered stuff for a 4.3 I was building and when I got the stuff I realized I had a 3.8 and I called crane cams and they told me the stuff would not work. I checked every thing with calipers and it all was the same as the stock cam out of the 3.8 So I put it together and ran it several times until it finally blew on me at a race that was more like a mud run then a derby. I had to hold it to the floor for a good 20 mins to keep from getting stuck hope this helps some of u guys.
Badass, Now i'm going to start throwing money into my 3.8.
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Re: 4.3 Chevy tips/tricks
« Reply #54 on Nov 27, 2011, 5:34pm »
i have a 3.8 in one of my cars and it works pretty darn good. i am also building a 4.3 for another one of my cars.
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Re: 4.3 Chevy tips/tricks
« Reply #55 on Nov 27, 2011, 6:19pm »
All my dad and i run is 3.8's. He's won over 2k with his in the past 5 years, and his is still kinda stock.
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Re: 4.3 Chevy tips/tricks
« Reply #56 on Nov 28, 2011, 8:04pm »
Hey guys I found a website with great info. I don't know if it's been said before.
www.hotsixes.com/index.php?option....id=14&Itemid=12
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Re: 4.3 Chevy tips/tricks
« Reply #57 on Nov 30, 2011, 7:31pm »
will a 2 barrel motorcraft 500cf over load the 4.3
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Re: 4.3 Chevy tips/tricks
« Reply #58 on Dec 3, 2011, 8:45pm »
i ran a holley 500 cfm and liked it. Got a question does anybody no where I can get a aftermarket crankshaft for a 4.3, the only ones ive found is a scat oem replacement or a altered stock 4.3 crank thats a so called stroker crank,I dont trust it.
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Re: 4.3 Chevy tips/tricks
« Reply #59 on Dec 4, 2011, 11:18am »
I've got a pretty much stock 4.3 and a turbo 350 trans my question is what gear would be better my 4.10 or my 5.62 all my local tracks are pretty small
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Re: 4.3 Chevy tips/tricks
« Reply #60 on Dec 4, 2011, 11:31am »
4.88 or 5.10 is what I would recommend for gears
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Re: 4.3 Chevy tips/tricks
« Reply #61 on Dec 4, 2011, 11:49am »
I use 4:10's with my 3.8, My tracks are pretty small as well.
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Re: 4.3 Chevy tips/tricks
« Reply #62 on Dec 4, 2011, 2:04pm »
here are a few tips i have found for this motor that will swap over from a 350. cam bearings, main bearings,pistons, valvetrain parts, timing cover, oil pump, and front dress. im grabbing one to power my car hoping i wont have traction issues with my 7.5 stock rear gears welded solid with tractor lugs.
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Re: 4.3 Chevy tips/tricks
« Reply #63 on Dec 18, 2011, 10:19pm »
To the guy who asked about gear ratios. I would say go with 4.56s.If u run small tracks it will work perfect. It would be low enough to pick up speed quick but not low enough to rap your mtr out when your going for a full track shot.
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Re: 4.3 Chevy tips/tricks
« Reply #64 on Dec 24, 2011, 10:03pm »
what about 3..73 gears with a chain saw 3-speed???
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Re: 4.3 Chevy tips/tricks
« Reply #65 on Dec 24, 2011, 10:10pm »
you no what ratio you 3speed is i think it would depend on if the tranny was a 0 grove or on up to a 3 or 4 grove i believe, never ran a 3speed but always wanted to but i would base your rear gears off of how you first gear is in your car, lol prolly dont help much
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Re: 4.3 Chevy tips/tricks
« Reply #66 on Dec 25, 2011, 2:06pm »
ill get 2 test it when i can get the broken bolt out of the egr setup and get it blocked off
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Re: 4.3 Chevy tips/tricks
« Reply #67 on Jan 1, 2012, 11:54pm »
couple questions........just got a 4.3 , someone stuck it in a 80s blazer that originally had a 2.8 so not sure what it originally came out of.....................has black plastic center bolt valve covers stamped vortec, block #s are 4.3 LG from left to right backside of block behind dist...........2sg.........d297.......10066011
intake casting # is 14094011
have been trying to to decode it with little success.......from what ive read it says its a non vortec 87-94 tbi engine with no balance shaft , but does not really give any more info than that ...........and I guess the plastic centerbolt valve covers are throwing me off...............any ideas guys
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Re: 4.3 Chevy tips/tricks
« Reply #68 on Jan 2, 2012, 5:40pm »
Check www.hotsixes.com
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Re: 4.3 Chevy tips/tricks
« Reply #69 on Jan 15, 2012, 8:15pm »
Hey guys I read through all the building a 4.3 section, and i have a few more questions hopefully i didnt just miss the questions. So a regular v8 disributor will go right in a VORTEC 4.3 also? I know they will work in the tbi engines. Just not sure about the vortecs. Also, I can get a carb 4.3 MARINE vortec intake and carb. Any downside/upside to a marine carb? Thanks
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Re: 4.3 Chevy tips/tricks
« Reply #70 on Jan 17, 2012, 8:53am »
Jan 15, 2012, 8:15pm, junker00 wrote:
Hey guys I read through all the building a 4.3 section, and i have a few more questions hopefully i didnt just miss the questions. So a regular v8 disributor will go right in a VORTEC 4.3 also? I know they will work in the tbi engines. Just not sure about the vortecs. Also, I can get a carb 4.3 MARINE vortec intake and carb. Any downside/upside to a marine carb? Thanks
should be no prob's on the marine carb .but you can run anadapter to run a holley, or any other carb really.
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Re: 4.3 Chevy tips/tricks
« Reply #71 on Jan 18, 2012, 8:11pm »
also i have a non vortec 4.3.....would a 350 cfm be big enough? it is a stock engine. Or should I go with a 500 cfm?
Thanks