TPI differences, 86 and 89..
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Supreme Member
Joined: Apr 2002
Posts: 3,552
Likes: 5
From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
TPI differences, 86 and 89..
I have a spare TPI setup laying around from my 86 vette that I've spent a lot of time porting and I'm going to polish it up, my question is can I use it on my 89? I know the differences with the cold start injector but as far as I can tell the difference is only in the runners and the fuel rail, am I correct in that? Basically I'd like to know if the base and the plenium's are the same.. thanks!
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iTrader: (1)
Joined: Aug 1999
Posts: 2,842
Likes: 6
From: Rowlett, TX
Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
Re: TPI differences, 86 and 89..
The base is different, it has the old style bolt pattern. On 87+, the 4 middle intake bolts go into the heads at a different angle.
Thread Starter
Supreme Member
Joined: Apr 2002
Posts: 3,552
Likes: 5
From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
Re: TPI differences, 86 and 89..
good call, completely over looked that one that should have been obvious.. is that it? That's pretty easy to fix..
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