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Tech Question
Marcus Canon, Longview, TX, 1991 Dodge Shelby Daytona 2.2
Hi, all knowing Rick. I recently bought a real nice 1991 Shelby Daytona turbo I, auto. So far I have installed a K&N air filter,Gibson muffler, 2.50 inch tailpipe and gutted the cat. This car is really fast, but, I want a little more power.Can I advance the timing manually, if so, how much, or do I need the Mopar Performance computer? I will add a Spearco water injection system. The car does not have a intercooler. Thanks, Marcus.
Marcus, you say you have a 2.2L. But I think, if you check, you'll find that it's really a 2.5L, with a Mitsu, not Garrett, turbocharger, and a one-pc. tuned intake manifold (similar to the '88-89 T-II piece) - unless, of course, a prior owner swapped in an older mill.
As long as you run at least 93 octane (or the water inj.) at all times, you can safely advance the timing about 6 degrees (max.). Just twist the dist! Use the factory service manual procedure and underhood emissions label for guidance.
The MP SBEC (computer) will also bring up the boost a bit more quickly. But the stock 1991 2.5L T-1 calibration was pretty good, so you won't gain nearly as much, unlike the older 2.2L's which REALLY picked up with the MP calibration.
Rick
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