87TransAmGTA

For the Trans Am (87) I noticed they had a few less HP than the same year camaro's due to some engine restrictions or whatever, Anyone know what caused this and How would you get this HP back.

I was also looking at getting a big intake and a dual exhaust, not sure what kinds.

85_305

I *believe* it was intake design, but don't quote me on it

87TransAmGTA

So if i get like a custom intake it should add alot of hp?

sw89lt1

save your money and buy a 350. you can find good used 350s for cheeper than moding a 305.

cc89formula

well he has a point, a 350 is better. however some people dont want to make that kind of swap. if you look at some years, like 89, HP from a 305 and 350 was only 15hp. So if you want to you can throw an intake and exhaust on it. Just do stuff that you can take off and put onto a 350 if you want to later. I wouldnt mess with aftermarket rods, pistons, or crank.

iansane

I'd say the difference would be in the plastic intake tubing. Although the difference is negligible. Just get an aftermarket one. It probably won't even be a noticable difference. Start off with just a thorough tune up.

85_305

No, I'm talking along the lines of actual intake *manifolds* were different between the GM car and the Pontiac car

But 87TransAmGTA, I dont know about a *custom* manifold, there are SEVERAL good manifolds out there, and for decently cheap at that You just gatto know what your looking for.

But there is nothing wrong w/ the 305. Well, unless it's a tbi. THEN your SOL. Otherwise, you will be fairly well-off w/ that 305 unless you have the time, money, and patience to swap to a 350.

doug791

This i have a problem with. Thats just blatently not true, and you must be just making it up off the top of your head because not only is it not true ive definitly not ever heard anyone say that. The same engine between both cars is the exact same, only difference would have to be in the style of air box

Pneumatic_Tire

Im gonna chime in here and say that 85_305 is right. The intake runners are slightly different in some way. Can't remember how exactly.

Bow94z

N20!!!! then move onto a 350

85_305

Thank you Jon, I didn't think I was crazy. I am pretty sure that the design of the intake manifold on the Pontiac's was responsible for a 10 hp loss to it's Chevy counter part

iansane

No. You're just wrong. It's the exact same engine. It'll always have the exact same intake manifold on it. And if you can't prove your hearsay don't spread the false rumors.

EDIT: The only difference in horsepower is going to come from a different cam offered in a 5speed vs auto or non-g92 vs g92 car.

doug791

I didnt want to go too far out on a limb, because i dont know a whole lot about the tbi, cfi etc engines they used i couldnt say for sure there was absolutly no difference, even tho i was 99% sure they were the same. But as soon as youre going to start saying that there is a difference in the tpi runners flags are going up

cc89formula

the only difference between camaro and pontiac cars was the plastic intake, not the actual manifold itself. The camaro got the plastic Y type that went down in front of the car and thats why they picked out the extra few ponies, it was a ram air effect.

85_305

For the re-re's that dont know what their talking about, check this out
(Look at the botom of the '92 model year Camaro)
http://www.thirdgen.org/newdesign/tech/techdb.shtml

See that part where it says "Note: These are Camaro ratings. It is said to take around 5-10 HP and TQ from TPI Firebirds because of intake design."
??
Ya.. so Jon and I would appreciate that appology now