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Old 07-11-2019, 05:57 PM
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Cliff R Cliff R is offline
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Join Date: Nov 2000
Location: Mount Vernon, Ohio 43050
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10 mpg is way off the mark for that engine/drivetrain/vehicle combo. With a small cammed 400 and OD transmission I'd expect 15-18 city and 18-20 or so on the highway. The tune just has to be WAY off the mark or a fundamental problem someplace.......Cliff

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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),