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Old 08-10-2008, 08:27 AM
Junior Member
Join Date: Oct 2006
Location: Littleton, CO
Posts: 18

Another thing... with aluminium you can run a little more compression on the same grade of fuel. I switched to pro1's last year and bumped c/r to 12:1 and still run 91 oct pump gas. My old ported 461's wouldn't take more than 38 deg total timing. Pro1's like 44 deg total. I saw a big gain, picked up 7 tenths.
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