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Hot rod 90 deg gm v6, Chevy or Buick? #5366269 03/03/20 01:25 PM
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Red91 Offline OP
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If you were going to build a carbureted, mildly cammed 90 degree gm v6, would you choose a Chevrolet 4.3 or a Buick 3.8/4.1? The engine would probably be backed by a th350 or a Borg Warner t5, and would see street use as well as auto x, maybe even drag strip.

Lol, yes I know there's a lot of variables, but I've got this crazy idea. I recently purchased a dirt cheap 2006 Suzuki grand vitara currently equipped with a 2.7 v6 and and 5 speed, 2wd. I'm very seriously considering yanking all that out and swapping in a GM 90 ohv v6. I'd like to build a street/track car out of it, and I'm thinking old school carb/cam/distributor setup. I could probably more easily get my hands on a Chevy engine, but it seems the Buick may have more potential long term.

Speaking of long term, that's what this project will be, so if I go with team Buick, I'm not opposed to waiting while searching around for parts. I'm not looking to do anything radical, and would probably keep the bottom end stock. So, to those of you with hot rodding experience, what say you?

Btw, if I do this, it will get a v6, v8 is not an option.


05 Chevy Impala
3.4 V6
Pit crew QS 10/30
Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366278 03/03/20 01:34 PM
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Any reason you are stuck on one of those old slugs? Lots of newer, more powerful, and lighter weight options out there...

If you are hung up on those classic style engines, there's the Mopar 3.9 and 4.2 Ford as well.

That said, I don't think it really matters, for what you are doing. Flip a coin, or see which engine falls into your lap first, and pick that one.


2011 Ford Crown Victoria LX 4.6L V8 auto
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Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: emmett442] #5366291 03/03/20 01:46 PM
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No particular reason at all. I just think it would be neat.


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Pit crew QS 10/30
Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366316 03/03/20 02:08 PM
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Is your area emission exempt? Just asking as i used to be an emissions Inspector and for the most part counties with emissions inspections don't allow engines that are older than the model year of vehicle. If not it looks like a cool project.


If at first you don't succeed fail fail again. (Waldorf and Statler.)
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Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366320 03/03/20 02:11 PM
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Since GM had ties to Suzuki back in the day I'd go with a chevy block. Wouldn't think a buick would be different as far as software but how do you plan on making everything run correctly?


If at first you don't succeed fail fail again. (Waldorf and Statler.)
1997 Geo Prizm...DEAD
1984 Mazda RX-7 Spec 7
2005 Dodge Neon
Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: 97prizm] #5366332 03/03/20 02:26 PM
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Originally Posted by 97prizm
Since GM had ties to Suzuki back in the day I'd go with a chevy block. Wouldn't think a buick would be different as far as software but how do you plan on making everything run correctly?


He says in the original post he wants to go carburetor. Ignition can be standalone simply enough. Factory equipment probably isn't going to matter much.


2011 Ford Crown Victoria LX 4.6L V8 auto
2009 Chevrolet Malibu LT 2.4L I4 auto
1974 Dodge D200 360 V8 4 speed manual
Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366341 03/03/20 02:33 PM
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userfriendly Offline
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The crankshaft is the weak link in the 4.3L even fire Chev V6. You can check GM performance parts for 4.3L options. Buick V6s have been installed in Toyota trucks, replacing the 20 & 22Rs.
A turbo'd Buick V6 would be cool.

Last edited by userfriendly; 03/03/20 02:33 PM.
Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366390 03/03/20 03:18 PM
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Lolvoguy Online Shocked
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I'd start with a DeLorean's V6 PRV engine (also shared with Volvo's 260/760 lineup).
Best engine for travelling thru time!
cool


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Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366399 03/03/20 03:30 PM
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I don't want to rain on your parade, but the won't the tall nature (width/height ratio) not allow that to run in an Auto-X race?


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Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366455 03/03/20 04:57 PM
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Kinda a dumb idea if you ask me. And expensive. It'd be a joke if you go through all that and get spanked by a stock late model V6 Camry, which you probably would.


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Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366462 03/03/20 05:03 PM
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Vitara for autox, eh? Cool.
Will an LS fit in there? Get a wrecked Chevy truck and swap everything over grin2

Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366502 03/03/20 06:09 PM
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ARCOgraphite Offline
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Originally Posted by Red91
If you were going to build a carbureted, mildly cammed 90 degree gm v6, would you choose a Chevrolet 4.3 or a Buick 3.8/4.1?
Btw, if I do this, it will get a v6, v8 is not an option.


I was going to say if there room for an I 4 there is room for an eight.

IIRC the chevy 262 which is a gen 1 SBC 350 minus 2 holes.It should have better breathing head options. But i havent looked at a Buick six-er

Tons of parts many V8 parts swap except the rods
This engine is also used as an inboard-outboard Mercruiser boat motor.

I would try to get any earlier block without the balance shaft - so that would be pre-mid 90's.

Great torque maker should be an easy 250+ hp with a decent cam, good heads, 11:1 comp and a little 4 bbl or big 2bbl carb.
Hard to beat the classic factory SBC hydraulic cam profile to make 1 hp/cu-in. IIrc it was 222/222 .447lift 114 lobe center

And I'm a Buick guy currently rebuilding a 340 for a '67 GS 340 smile

- Ken

Last edited by ARCOgraphite; 03/03/20 06:15 PM.

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Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: Red91] #5366542 03/03/20 07:20 PM
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I'll answer yalls questions best I can.

Currently Alabama doesn't have emissions testing, and the vehicle is going to be tagged and insured in its current stock form. I plan on driving it awhile as is.

I'd be looking to make changes to the suspension and steering to improve handling, if auto x is where it ends up. As mentioned, this thing could be a drag car instead.

The plan involves basically stripping the car out and starting from scratch. So I won't be using the PCM and would only try to retain the original wiring for the lights and turn signals.

Skyactiv: I'm really not concerned with being beat by a new Camry. Fun first. I can work on a pushrod carbed v6. I care not to get involved with the complexity of newer ohc engines and computers. I just want to have fun screwing around with an oddball car, and maybe do some amateur motorsport in the process.

I'm not certain the v6 project will end up going in to the Suzuki. I can make a little money on it as it is now. A v6 project period is really the point. A car to do amateur racing in is the goal. The vitara could just be a gateway. But hey, its what I got right now and regardless of vehicle, a gm 90 v6 is the desired engine.


05 Chevy Impala
3.4 V6
Pit crew QS 10/30
Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: ARCOgraphite] #5366549 03/03/20 07:25 PM
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I was actually thinking of using an edelbrock top end kit for either engine, which includes cam and lifters, four barrel carb and intake. Not certain of the numbers on the cam, but I can look them up.


05 Chevy Impala
3.4 V6
Pit crew QS 10/30
Re: Hot rod 90 deg gm v6, Chevy or Buick? [Re: userfriendly] #5366551 03/03/20 07:28 PM
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Red91 Offline OP
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Would you say the Buick crank is stronger? I'd be looking for an even fire Buick, but I'd still rather not met with the bottom end too much aside from maybe refreshing it. So if the Buick stock crank is stronger, that'd be a good vouch for going with a Buick v6.


05 Chevy Impala
3.4 V6
Pit crew QS 10/30
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