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To be aggressive with the timing advance you need to use a knock sensor (or two) as the S, turbos and 2.7 do. I would think that going to a higher compression would require a knock sensor too.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
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