Lower TPI Intake Differences?
Thread Starter
Joined: Apr 2012
Posts: 79
Likes: 1
From: Pennsylvania
Car: 1989 Formula Firebird
Engine: 305 TPI
Transmission: 5-speed
Axle/Gears: 3:45
Lower TPI Intake Differences?
I have a stock 1987 Formula 350 TPI, and will be replacing the intake gaskets. The lower intake is filthy, and I came across one from an 89 Camaro that looks really good, also one from an 89 Corvette. Will either of these fit on my 87?
Joined: Dec 2004
Posts: 16,906
Likes: 1,014
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Lower TPI Intake Differences?
The 89 f body will work just no hole for csi timer switch. The Vette base has to have center holes elongated to fit 72 degree bolt pattern.
Joined: Dec 2004
Posts: 16,906
Likes: 1,014
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Lower TPI Intake Differences?
If you do use the Vette base block the rear egr feed and coolant hole 1/8npt hole.
Junior Member
Joined: Jun 2009
Posts: 71
Likes: 11
From: North Central Indiana! GO IRISH
Car: 89 PONTIAC TRANS AM
Engine: 5.0 TPI
Transmission: Stock 4SP 700R4
Axle/Gears: 4TH GEN 3:23
Re: Lower TPI Intake Differences?
Also wasn't 89 the first year to not have the cold start injector on the TPI intake? That might be an issue putting an 89 intake on the 87
Joined: Dec 2004
Posts: 16,906
Likes: 1,014
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Lower TPI Intake Differences?
The passage is still in the intake so it’s a matter of what runners are used if the provision is there on the runner itself.
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