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Old 04-05-2005, 12:54 AM   #5
2phless
Scooby Specialist
 
Member#: 69343
Join Date: Aug 2004
Chapter/Region: South East
Location: 'tween Lewisville&Clemmons NC
Vehicle:
1998 TransAm cnvrtbl
Black

Default

This was something that we discovered at Turbo-Tunes in Greensboro NC. but I was not entirely sure of at the time. Mark, who runs that place, is a Grand-National genious and can build a heck of a turbo'd mustang... but he's not as familiar with the Subaru platform. So we were learning.

But we did some late-night UTEC road tuning and the bang-for-the-buck seemed to come from lean fuel and conservative timing. Timing advances didn't make a lot of difference, but the leaner condidtions were well felt even with the butt-dyno. And the bad knock results were a lot worse when adding timing than when pulling fuel.

I've been working on a 22 psi setup for my STi ( I have a very safe 20 psi map so far to work with) and trying to maintain richer than 10.9 under WOT. But I think I might pull timing and go for a bit leaner setup to see what happens.

Of course the weather is getting super warm in a hurry here to throw that monkey wrench into the works.
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