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If you don't have a wideband, I wouldn't trust that you are actually running 11:1. With the stock O2 you are only pretty much guessing. Try throwing somemore gas at it, see what happens. Look at your logs. Where is it knocking? Right when boost hits, or at a certain RPM. Go to where its knocking and try a few things. And somebody correct me if I am wrong but should you go for more around 12:1 or 12.5:1 A/F when on race gas?
CRAIG
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