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Just a gas mileage question with perfomance engine!!

Guest traub83

By Guest traub83
in Gen I & II Chevy V8 Tech Board

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Alf Newbie

Alf

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I have a 69 camaro with a 355 it has a extreme energy comp cam .490 lift, flat tops, msd 6al, roller rockers, edelbrock performer rpm intake, 67 chevy double hump heads ported 3 angle valve job, and a 750 cfm holley double pumper, i have run a best of 12.82 at 108 and i have calculated it to be right around 425 hp and i get about 15 mpg and thats with 3.73s and a muncie no overdrive.

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