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#8: 01-31-2008, 12:26 AM
Boostjunkie's Avatar
Title: Flying W00t Monkey
Location: Santa Clarita, CA
Car: 05 Legacy GT, 06 Tribeca, 07 Outback
Posts: 7,111
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The same car made 500 whp on race gas. I targeted 12:1 AFR rather than the 11.5.1 I usually tune Evo's to. Ran 30 psi and quite a bit more timing. This particular car seemed to have a weak ignition system as it was incapable of firing the plugs cleanly at higher boost levels, so I didn't raise the boost as much as I might have liked and made the power with more timing. Since I couldn't cram any more air/fuel in to the cylinders, I just used more timing to get what was in there to burn. Of course, higher octane fuels inherently need more timing as they burn more slowly than pump gas.