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ATS gas/E85 tuning

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For those guys using HP tuner or equivalent, what kind of timing are you able to run around 20-22psi and what A/F do you shoot for. I keep timing low around 0-1 ° and try to targer 11.9-12:1 A/F but have not had success with logging zero knock. Anyone on E85 what A/F do you target? I noticed the PE table is low for alcohol compared to gas, does it use another table to add fuel for alcohol under wot?

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