TB Bypass question
Thread Starter
Joined: Jul 2010
Posts: 833
Likes: 17
From: The Jersey Shore
Car: 1991 Firebird Convertible
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.45 9 Bolt Posi
TB Bypass question
On a L98 what are the pros and cons of bypassing the TB? Went to change the lower gasket by the IAC valve and 2 bolts broke in it, concerned that it might leak. Can I just run the hose from the port coming off the manifold to the heater core?
Supreme Member
Joined: Jul 2009
Posts: 2,328
Likes: 9
From: Kitchener, ON
Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: TB Bypass question
Yes you can run the hose directly from the intake to the heater core. No cons on this one. The only function of the throttle "heater" is to prevent icing in sub zero temperatures because the TB doen't get enough heat from the engine because it's too far away.
Thread Starter
Joined: Jul 2010
Posts: 833
Likes: 17
From: The Jersey Shore
Car: 1991 Firebird Convertible
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: 3.45 9 Bolt Posi
Re: TB Bypass question
so i guess for a car that will only be used in the spring/summer/fall no sense to have it....
Joined: Sep 2000
Posts: 2,504
Likes: 195
From: Moorpark, CA
Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: TB Bypass question
I ran my car even during the winter in Colorado and I never had a problem with icing. I don't see any real negatives at all to doing the mod.
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