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Old 04-08-2002, 06:33 PM   #1
Psyco Diver 69

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Post question about the buick 252 V6

So how good were the Buick 252 v6 engines

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Old 04-08-2002, 06:53 PM   #2
85cutty231

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about....and these are factory figures..105hp worth of good
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Old 04-08-2002, 06:55 PM   #3
85cutty231

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i think at least
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Old 04-08-2002, 07:36 PM   #4
Rob

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252's are as good as 231's for reliability and 260's for power. Not much of a recommendation.
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Old 04-08-2002, 07:49 PM   #5
Kcze9159

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Contrary to the opinion so far I would recommend a 252 engine highly.... you already get a 4bbl intake which you can build off of or follow the idea below, and the crankshaft and rods in the engine are identical to those used in the turbo buick v6 engine found in a grand national capable of handling a ton of horsepower. I'd snag a good running short block, and best case scenerio port the heads a bit, buy a 1987 3.8 bare block for rebuild out of a boneyard (look for the 109 casting): end product would be the same motor (if you turbocharged it and swapped a intake/injectors/harness etc onto it) as the grand national motors had
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Old 04-08-2002, 07:56 PM   #6
Rob

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I could be wrong, but I've heard that the later Grand National turbo v6's were actually identical to the 88' and later 3800 v6 Buicks.
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Old 04-08-2002, 08:13 PM   #7
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Quote:
<font face="Verdana, Arial" size="2">Originally posted by 1986442455:
I could be wrong, but I've heard that the later Grand National turbo v6's were actually identical to the 88' and later 3800 v6 Buicks. </font>
nope. other than the fact that its a buick motor with the same displacement, the 3800 is a totally different engine.

and since this isnt olds related, moving to the lounge.

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Old 04-08-2002, 09:46 PM   #8
Rob

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[quote]Originally posted by 1986442455:
[b]I could be wrong, but I've heard that the later Grand National turbo v6's were actually identical to the 88' and later 3800 v6 Buicks.

Sorry. I thought I heard from someone the 3800 was based on the GN v6 with turbo. 252's aren't that bad of an engine. All came with an original 4bbl carb and intake and dimensions were based on a 231 v6 block. Key to getting power out of it just like any other engine: More compression and bigger cam.
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Old 04-08-2002, 10:36 PM   #9
Kevin

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I'm still confused about those horsepower ratings. Back in the days of old, simply upgrading from a 2bbl to a 4bbl made the factory rating go up 15-20hp, yet this 252 which has the carburetor advantage and 21ci more displacement is barely any better than the 231. I somehow don't see GM wasting all the money to tool a different block, different pistons, different intake, etc to make an engine that only has 10hp more than the 231. Perhaps they didn't want to make the 260 look worse...

Anywho, there's a nice 252 in a '83 Riviera at a local junkyard. For some reason, I'm buying the entire drivetrain from it. Does anybody know anything about the fuel-injected 3.8L used in late-'80s cars (the ones with distributors instead of coil packs)? It looks to me like the Buick intake will bolt on backwards, so I'm going to get the intake off a 3.8L in hopes of someday making a port fuel-injected 252 for a RWD car. Also, is there any source for pistons for a 252? I had my machine shop check, but all they could come up with was stock replacement cast pistons for 8:1 compression or $600+ JE pistons.
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Old 04-09-2002, 12:46 PM   #10
Psyco Diver 69

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Quote:
<font face="Verdana, Arial" size="2">Originally posted by Kevin:
Anywho, there's a nice 252 in a '83 Riviera at a local junkyard. For some reason, I'm buying the entire drivetrain from it. Does anybody know anything about the fuel-injected 3.8L used in late-'80s cars (the ones with distributors instead of coil packs)? It looks to me like the Buick intake will bolt on backwards, so I'm going to get the intake off a 3.8L in hopes of someday making a port fuel-injected 252 for a RWD car. Also, is there any source for pistons for a 252? I had my machine shop check, but all they could come up with was stock replacement cast pistons for 8:1 compression or $600+ JE pistons.</font>
My mom has a 89 Buick Le Sabre Limited with the 3.8 and in her book it says 205 HP, but I can't remember the torque rating. I asked that question before about switching the FI mainfold with mine and a buch of people said it wouldn't work because of the computers and everything

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Old 05-04-2002, 09:01 PM   #11
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hey just testing the signature

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84 cutlass, buick 231. very stock; very slow
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