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Video!!! My GTP vs 87 firebird



80's engines sucked for the most part. Minus the GNX's 3800 of course.

Also, what are his mods? And why hasn't he dropped a built 350 or at least a cam'd 350 in there?
 


Wow. Can't say I enjoyed watchin that. I owned a 305 '87 firebird. They aren't exactly fast. But, good kill anyway bro
 
ls1camino said:
Didn't they have the 3.4?
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Buick Regal - Wikipedia, the free encyclopedia

Read that... In short, no because it was a Buick and carried the Buick 3800 and the 3400 is a larger version of the Chev 3100, a Chevy 60 degree V6.

If you're talking about F-bodies then I believe they also had the smaller 2.8L V6 60 degree chevies in the third gen (3100 for 90,91,92), 3400 for half of the fourth and then they switched over to the buick 3800.
 


superv6 said:
Wow. Can't say I enjoyed watchin that. I owned a 305 '87 firebird. They aren't exactly fast. But, good kill anyway bro
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Yeah actually I want a firebird like that to build. One of my friends is a dang good mechanic so he would help me build it. At least he got beat by another pontiac instead of a mustang lol
 
I know for a fact, having a 305 in the garage, most stock GP GTs could run them into the ground... the 91 Maro in the garage runs 190HP with it's 305... GP GTs run about the same, and I'd like to bet they are lighter...
 
SaW1833 said:
I know for a fact, having a 305 in the garage, most stock GP GTs could run them into the ground... the 91 Maro in the garage runs 190HP with it's 305... GP GTs run about the same, and I'd like to bet they are lighter...
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Wrong on the lighter, and apparently wrong on the HP ratings.

GP=3400 and Camaro =3000-3300

I forget which magazine but they took an LG4 i believe (80's smogmobile 305) rated at 150 horse from the factory and it put out ~195. With a new intake, cam and heads it was at 330 horse. You can make a 350 put out 400 at the crank for a grand.
 


SaW1833 said:
I was reading on a 3rd gen site that 91 Camaro RS V8 makes 190HP, but I guess if im wrong im wrong.
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my sister had the 92 RS w/305 and I raced her with my 1991 Z-34 Lumina which had the 3.4 DOHC motor rated at 200 HP. I was just a little bit quicker than her. From a roll@10mph until about 70 I beat that car by about 1.5 lengths. It was close until my R's got up there and she shifted into second, then I pulled on her. So, I would say that those are fair ratings. These were both autos btw.
 
Come on guys... those old 80's 305's have a redline of 5 grand... They have no valvetrain (no roller lifters and cam here), no intake, no exhaust. How do you expect a 5L V8 to breath if its got exhaust manifolds that are smaller (probably the same size) than the stock GP ones?

Doing the mods I listed in that last post (including headers) to a GT GP nets you ~200 WHP so ~250 at the crank from 231 cu in engine which is ~1.08225108 HP/cu in. 330 CHP with 305 cu in of displacement means ~1.08196721 HP/ cu in.

In english? Take a GM 60's engine design, optimize it (heads up, intake and exhaust) and keep it N/A, you'll get roughly 1.08 HP/ cu in.

Modern cars are much more advanced that we seem to give them credit for.
 
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