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petevb petevb is offline
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Join Date: Nov 2003
Location: Bay Area, CA
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Lowering C/R on a race motor

Let's say that you had an 11.2:1 compression ratio 3.8L twin plug race motor with motec engine management, TMW throttle bodies, etc. Itís tuned for race gas, but you need it to run on CA 91 octane. What do you do so it can run it on pump gas, at least from time to time?

A few things crossed my mind, including headwork, shims to space the heads up, tulip valves, an engine remap, and finally new pistons. Anyone know how the options would stack up?
Old 08-08-2004, 11:47 PM
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