Corvette TPI VS Firebird TPI 88-96
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Junior Member
Joined: Dec 2004
Posts: 6
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Car: 1991 FireBird Formula
Engine: 355 TPI
Transmission: 5 Speed Manual
Corvette TPI VS Firebird TPI 88-96
What is the main differences between these 2 TPI motors is the vette motor better than the firebirds in these years. And does the ZR1 have the TPI set up or LT1. what years did they start the LT1 in the Vette?
Joined: Jan 2001
Posts: 3,188
Likes: 59
From: Conroe, TX
Car: 1987 GTA
Engine: LS1
Transmission: 4L60e
Well, to begin the vette had alluminum heads with D-shaped exhaust ports. I believe they also had a slightly more aggressive cam (could be wrong) and the solenoid in the transmission was different. Because of the different heads, the chip was slightly more agressive as well.
Not too sure bout the ZR1 - if memory serves me correctly it used an LT5. In 1992, the corvette used the LT1
Not too sure bout the ZR1 - if memory serves me correctly it used an LT5. In 1992, the corvette used the LT1
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Joined: Apr 2004
Posts: 52
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From: Oswego, IL
Car: 87 Pontiac Firebird Formula
Engine: 355 SBC-Thats all I can say or they will break my legs.
Transmission: 5 Speed
The ZR1 (LT5) was a totally different engine. It was a joint venture between GM and Lotus. It was an all aluminum DOHC engine (4 cams) had 16 injectors, and no common engine parts with a SBC. Totally different engine, and extremely expensive. The long blocks went for $24,000 from GM. Not worth it for the 405hp they made. THat is why they stopped making the ZR1
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