Need Opinions. Have nothing to compare to.

When I set up my holley 850 on my 500 motor I jetted and change the power valve (Holley) and insstalled wideband sensor . My #'s are very close to what you posted oi post 53.

Mattax said

F is Fuel/Air ratio for gasoline. Invert the numbers on the vertical axis to convert to Air/Fuel ratio.
0.08 = 12.5
0.667 = 14.7
0.06 = 16.6

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