305 tbi to 305 tpi
Thread Starter
Joined: Jan 2007
Posts: 976
Likes: 4
From: Newfoundland, Canada
Car: 1991 Pontiac Trans Am GTA
Engine: V8 305
Transmission: Automatic Transmission
305 tbi to 305 tpi
Whats the difference in the 2 and how can u change a tbi to a tpi?
Supreme Member
Joined: Dec 2002
Posts: 1,101
Likes: 0
From: Kingsport,tn
Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
TPI is a multi port fuel injection, thats the biggest difference. In my opinion, it wouldnt be worth it. Have to have new intake manifold, tpi setup, i think a different fuel pump, the new wiring harness and computer. And im sure there some other things that im missing but thats the majority
Supreme Member
Joined: Oct 2006
Posts: 1,974
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Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
if you have tbi stick with it if you have tpi stick with it...each has its own drawbacks as tpi sorta falls on its face past 4500 but makes more torque than tbi but i notice my tbi is pulling past 5500 while my bros tpi is in need of a shift
Supreme Member
Joined: Dec 2002
Posts: 1,101
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From: Kingsport,tn
Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
With all the time and money it would take, its just not worth it, it may be a little faster but not enough to justify all the work and money. Spend the money on other modifications to your TBI and youll see better results.
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Joined: May 2002
Posts: 772
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From: Montgomery, AL...for now
Car: 1987 F150...PAAARTY FOUL!
Engine: 300 I6 stump pullin sumbiscuit
Transmission: 4 speed grind box
Axle/Gears: 3.55 unlimited slip differential
...or just bypass all the crap and get a Holley Stealth Ram setup...it's kinda like TPI but with all the shortcomings fixed...it will make that 305 feel like a BEAST!
it's about $2,200 or so last time i checked but thats for EVERYTHING...ECU, wiring, intake, injectors, EVERYTHING...it is DEFINITELY worth it!
Josh
it's about $2,200 or so last time i checked but thats for EVERYTHING...ECU, wiring, intake, injectors, EVERYTHING...it is DEFINITELY worth it!
Josh
Supreme Member
Joined: Dec 2002
Posts: 1,101
Likes: 0
From: Kingsport,tn
Car: 1991 camaro RS
Engine: 305 Carb
Transmission: 700R4
...or just bypass all the crap and get a Holley Stealth Ram setup...it's kinda like TPI but with all the shortcomings fixed...it will make that 305 feel like a BEAST!
it's about $2,200 or so last time i checked but thats for EVERYTHING...ECU, wiring, intake, injectors, EVERYTHING...it is DEFINITELY worth it!
Josh
it's about $2,200 or so last time i checked but thats for EVERYTHING...ECU, wiring, intake, injectors, EVERYTHING...it is DEFINITELY worth it!
Josh
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Senior Member
Joined: May 2002
Posts: 772
Likes: 0
From: Montgomery, AL...for now
Car: 1987 F150...PAAARTY FOUL!
Engine: 300 I6 stump pullin sumbiscuit
Transmission: 4 speed grind box
Axle/Gears: 3.55 unlimited slip differential
you would still see a performance increase...you could upgrade heads later...some guys have to do it one piece at a time...
Josh
Josh
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