Right now im not sure on the compression ratio but around her just 91 octane is about 1.30 to 2.00 more the E85, 100 octane is around 6.00 a gallon. The car like to ping after driving it for a long time, I have been messing around with fuel mixtures and timing but it just wont go away and people told me to try a higher octane then 91.
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"Nightmare"- 1972 Dodge Challenger
Daily Driver- 1994 Trans Am
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