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Old 10-26-2003, 11:04 AM   #1 (permalink)
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3.8 or 4.3

I figured I would post this here since I dont have experience with either engine. I need some feed back on the 4.3 and 3.8 chevy engines. Particuliarly parts options for the 3.8. Build options etc., weight, top hp and torque. Pro's and cons please. The rest of the drivetrain will consist of a powerglide/d300 and mog rears. Personal experiences please.

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Old 10-26-2003, 01:40 PM   #2 (permalink)
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the 3.8 is a great little engine and makes good power, but id say for durability and brute torque i would go with the 4.3. plus the 4.3 will bolt up to any tranny that fits a SBC whereas the 60 degree'd 3.8 wont. parts will be easier and cheaper to find for the 4.3, and im not sure of the weight difference between the two.
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Old 10-26-2003, 05:19 PM   #3 (permalink)
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Go with a 4.3. There's not any reason otherwise to go with the 3.8 Like it was said. The 4.3 is a better choice for mating trannies to it.
Scott
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Old 10-26-2003, 07:53 PM   #4 (permalink)
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Not to hi-jack, but what trannies will work with the 3.8. I'm also debating this question. My motor will be on propane and I have a supercharger for a 3.8 sitting in the shop. However if the benefits of the 4.3 outweigh the free supercharger, the supercharger can be sold. Whatcha guys think?? I'm still undecided which I will go with, auto or standard. Thanks

Ary
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Old 10-27-2003, 10:17 AM   #5 (permalink)
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Good question Arya. Anybody know. Is it even feasable for the powerglide to mate up to it?
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Old 10-27-2003, 03:03 PM   #6 (permalink)
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i do beleive that there are adaptors out ther to mate the 3.8 to the normal bell, never looked into it that much. i dont know whay u would wanna run either, go out and get urself a nice tpi 305, itll run on any angle, and it does make more than enough power to make up for the extra weight. but if ur gonna go with a v-6, id say the 4.3, theyre cheap and plentiful, plus gettin them with tbi is ez thanks to the s-10. of course theres always the other v-6 alternative.....the 2.8
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Old 10-27-2003, 03:36 PM   #7 (permalink)
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Quote:
Originally posted by Po' riggity
Go with a 4.3. There's not any reason otherwise to go with the 3.8 Like it was said. The 4.3 is a better choice for mating trannies to it.
Scott

200-r4 I can't think of any others unless you go custom.
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Old 10-27-2003, 03:56 PM   #8 (permalink)
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It also depends on what 3.8 youre using. A favorite of 4 wheelers for decades have been Buick 3.8's. The distributor is in the front like a ford, so more firewall room, ton's of th350's w/Buick or BOP bolt patterns. I've got a BUILT Buick th350 with a AA to Dana20 or Spicer 18 tranny sitting in my garage right now.
If you really wanted power, get one of the Turbo 3.8 from an early 80's Regal. Just gotta watch where the water splashes then.
But there are a blue million of them around!! Tons of performance mods. Really one hell of a motor..
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Old 10-28-2003, 06:31 AM   #9 (permalink)
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Wanna stay away from the 8's because of weight. Dont have the big money for all aluminum this and that that would make a 8 really powerful. Can use either the 3.8 or 4.3 chip it and have power in the 240-275 hp range for a lot less and with a lot less weight. Less weight being the key ingredient.

Sooo that being said will the 3.8 go to a powerglide and has anybody done it?
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Old 10-28-2003, 09:38 AM   #10 (permalink)
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Um.. Buick 3.8 turbo is a V6
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Old 10-28-2003, 11:58 AM   #11 (permalink)
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8's as being v8s not 3.8s. Referring to the 305 tpi comment from thunder. I could dump a v8 in it all day long but at the cost of another what 100 lbs?


Soooo back to the original question: Has anybody run a 3.8 to a powerglide?
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Old 10-30-2003, 07:44 AM   #12 (permalink)
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Anybody have anymore info on this subject???
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Old 11-01-2003, 09:51 AM   #13 (permalink)
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JW makes an Ultra bell housing that looks like it has the BOP pattern. I run a 4.1 Buick V6 (same externally as the 3.8) with a TH350. I went with the Buick over the Chevy 4.3 because the Buick is lighter, an about an inch less in height, width, and length.

http://auto2000.com/jw/

I was considering going to the PG, down side is the high first gear.
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Old 11-01-2003, 10:53 AM   #14 (permalink)
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Ive got an old 4.1 w/3.8 turbo heads laying in my garage.. its my old motor. Do you need a really strong th350 Buick with AA/spicer 18? TC included? I dont use the Buick stuff anymore.
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Old 11-01-2003, 08:44 PM   #15 (permalink)
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I would go with the 4.3 for the power and reliability and also the parts are a bit cheaper. The EFI is a piece of cake too. Besides, they have the same bore and stroke as a 350. It's like cutting off 2 cyls from a 350. Bolts directly to all the same trannies. Just mt 2 cts.
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Old 11-02-2003, 11:23 AM   #16 (permalink)
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how hard is the efi on a 2003 4.3 to wire?
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