Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
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.
__________________ 1988 Formula 5.7L/6sp 3.91 gears,10.6 cr, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, Superram, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT, E-Tec 200 heads, SDPC Vortec manifold, ZZ-409 cam.
Best ET 12.17
Best 60 FT 1.754
Best MPH 113.1
RWHP 369
RWTQ 399
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.
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.
__________________ "Towering genius disdains a beaten path. It seeks regions hitherto unexplored."
--Abraham Lincoln
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
They ALL had the L98 camshaft from 1990-1992. Every factory 305 prom chip even has the same fuel tables in them.
Quote:
Originally Posted by Saculia
If such is the case, why does thirdgen.org list two LB9 engines for the camaro and firebird for the time period stated above?
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.
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.
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.
