C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

85-88 and 89-91 throttle body difference

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Old Jul 5, 2006 | 12:11 PM
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Default 85-88 and 89-91 throttle body difference

Hello,
Does anyone know what the difference is between the 85-88 and 89-91 TPI throttle bodies? Are they interchangable at all?
THanks in advance
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Old Jul 5, 2006 | 01:10 PM
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Here is a link to Street & Performance' pictures
of throttle bodies.

.
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Old Jul 5, 2006 | 02:00 PM
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Originally Posted by Cam69ss
Hello,
Does anyone know what the difference is between the 85-88 and 89-91 TPI throttle bodies? Are they interchangable at all?
THanks in advance
The early TB were a cable on the arm and the later were cable over cam. They are interchangeable and the early TBs have a quicker opening rate.
P.S. Pretty car, I had a non rallye sport L35 4spd rallye green SS that I sold 20 years ago. Oh if I only had known!

Last edited by Bruce Witherspoon; Jul 5, 2006 at 05:08 PM.
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Old Jul 5, 2006 | 04:16 PM
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From: eville in
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Originally Posted by Slalom4me
Here is a link to Street & Performance' pictures
of throttle bodies.

.
Reply

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