"Isn't that Air Fuel Ratio kind of lean?"
Nothing was hooked up to measure A/F so I don't even look at those numbers.. I may gander at BSFC but the dyno operator is used to those numbers not being as "clean" as some of the Holley style carbs they use, but those "ugly" Q-jets still make as much as and often more power on back to back pulls.......FWIW.......
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran!
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),
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