Thread: Carb

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Originally Posted by Ken1960

Yea I got one in my car I installed suppose to be top of line I can watch it all time ,my builder thinks it will lean out on big end

What number are you thinking is "good" running down the road and at idle? An EPA tune in a newer vehicle is going to be no lower than 14.6 AFR at any time, but for a non-EPA tune running mid 14's at cruise, but down in the mid to low 13's any time you touch the throttle is going to give you a lot better transitions and snappier response. Trying to run 14.6 to 14.7 with a carb all the time is going to be tough, and skirting with running too lean and getting into trouble.
Just my $0.02, I'd say quit worrying about the AFR gauge so much. Just use it as a tool, and read your plugs.