This Chevrolet L98 TPI engine has its displacement stroked to 383 cubic inches and has stealth mods installed including a new cam and an extrude honed tuned port. Language Learning Torrent. 1985 - 1991 Corvette: L98 Engine Throttle Body Diagram. If you're a Corvette Action Center forum member, you can login to the forums below. The Boos Performance L98 Head and Cam 375+ HP Package INSTALLED. 52mm Throttle Body. Professional Installation, setup. TPI THROTTLE BODY SIZE, 48mm-52mm. Install an intake manifold,cam and heads that can. This horsepower and torque with a production L98 throttle body.

This is the final segment in a 4 part video on how to rebuild a Corvette C4 throttle body. In this video I demonstrate how to install the new idle air control valve (IACV) as well as new gaskets for the throttle body assembly. I also discuss replacing original screws (worn down, brittle and some broken during the tear down in Part 1) with after market screws. What is not shown is how to reinstall the throttle position sensor (TPS) we removed in the first video but it's easy enough (see Part 1).