chevys383

well does it?? tpi formula firebird i know the 350 tpi but i'm getting flak on a 305 tpi formula anyone??

bjankuski

I am not sure if I understand your question but if I do this is my answer. GM made 305 TPI Formula Firebirds so they do exist. My car was a 1988 305 TPI 5-speed car.

Saculia

iTrader: (1)

Yes, it exists.
I have one. It is a 91 WS6 formula 5 speed.
I know that GM made two TPI 305 engines for the formula. I believe that they also put the 305 TBI in the formula as well.
There were the 305 TPI with automatic, which was rated at 205 hp and 290 ft-lb of torque, and the 305 TPI 5 speed, rated at 230 hp and 300 ft-lb of torque. The 5 speed 305 TPI car came with dual cats and the cam shaft from the L98.

Zepher

iTrader: (1)

I have one too

Fast355

iTrader: (2)

ALL the FACTORY 1990-1992 TPI 305s had the L98 Camshaft, PERIOD, NO IFs, ANDs, or BUTs about it.

KrisW

iTrader: (5)

My 87 Formula was a TPI 305 5 speed car as well. No dual cats, but it did have the L98 cam. No way for me to know if it was factory or not due to the age/mileage.

Viprklr

iTrader: (5)

Here's another one. My 88 Formula came stock with the 5.0L TPI.

chevys383

my friend was arguing with me i informed him of a 89 formula 305 tpi car and he said there was no such thing so i wanted to prove to him they are out there cause he thinks he is the know it all about firebirds and trans-ams just wanted to prove a point to him

Air_Adam

I thought only the 5-spd cars got the bigger cam?

Saculia

iTrader: (1)

If such is the case, why does thirdgen.org list two LB9 engines for the camaro and firebird for the time period stated above?

Fast355

iTrader: (2)

They ALL had the L98 camshaft from 1990-1992. Every factory 305 prom chip even has the same fuel tables in them.

Exhaust WAS THE DIFFERENCE between the two. The G92 cars got dual cats and more power. The non G92 cars got the same exhaust setup that chokes into a HORRIBLE Y and 2 1/4" pipe that the TBI cars got.

Saculia

iTrader: (1)

So how much power do the automatic 305TPI cars make without the dual cats? This web site only lists them at 205 hp. GM rated the dual cat system at only 10hp over the single cat system and the 305TPI T5s were rated at 230hp. I wonder where the rest of the hp comes from.

xxnightraven73x

mines a 90 305 tpi stock as i can see since the hood says "5.0 fuel injected"

1991CamaroRslow

iTrader: (3)

I've got one with a blown 305 sitting in my driveway, I think they were more common than the Formula 350's.