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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,719
Dean, you're right. There's one vacuum retard curve that shows some retard under pressure but it doesn't retard much and it appears to be for 78 Cali and Japan cars (?).

I glanced at my curve last night and saw 17 BTDC. I just looked closer and realized it's 17 at 8000 RPM where I never plan to go. Mines right around 26 at 6000 RPM.
2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 11-12-2007, 03:02 PM
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