Re: Carb Jets
I had Charlie NY do the carb and fuel pump for my "46 Coupe, 59AB, because I was getting 12-15 MPG. He service them both and ran them on his test engine.
When I got them back, I bolted them on, made no adjustments to idle or idle mixture, and the engine idled at 500 RPM, with good vacuum. He found that a previous owner had drilled the main jets oversized. Mileage now ranges from 17-20 MPG. and the plugs look good, at least to my eye, after 9500 miles.
Don't know if this information helps, but that is my story.
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