Vito324
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Posts: 2,189
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Post by Vito324 on Sept 24, 2011 10:20:18 GMT -5
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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Post by widefrickenopen on Sept 24, 2011 18:13:06 GMT -5
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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Post by smok531 on Sept 26, 2011 21:59:00 GMT -5
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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Post by C4 on Sept 26, 2011 23:32:14 GMT -5
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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Vito324
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For badass roof signs, Check out BlackFlag Designs on Facebook!
Posts: 2,189
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Post by Vito324 on Sept 30, 2011 16:57:26 GMT -5
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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Post by stang40 on Oct 10, 2011 17:29:48 GMT -5
dose anyone know what the block numbers on 4.3s are
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Post by derbydriver666 on Oct 12, 2011 7:52:28 GMT -5
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 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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Post by rbrown77 on Oct 15, 2011 17:40:22 GMT -5
What point on a 6cyl hei cap is number one?
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ron17t
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Post by ron17t on Oct 16, 2011 19:12:01 GMT -5
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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Post by rbrown77 on Oct 17, 2011 17:40:55 GMT -5
Is anyone running the adjustable rev module and what are you setting ur rev limiters at
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Post by mrchevy on Oct 30, 2011 19:55:00 GMT -5
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Post by celebertyman12 on Oct 30, 2011 21:49:53 GMT -5
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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Post by C4 on Oct 30, 2011 22:34:43 GMT -5
^^^^^^^^^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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Post by celebertyman12 on Oct 31, 2011 8:34:19 GMT -5
^^^^^^^^^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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d45
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Post by d45 on Nov 6, 2011 21:39:39 GMT -5
i am wondering how to make headers for the 4.3 & dont want to buy some
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