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the lean condition on top end may be high speed air bleeds. try two sizes smaller. that should richen it up a bit. do this with an air/fuel gauge so you can see whats going on.



how do you change them on a car with pressed in bleeds? Do i have to try and drill the old ones our and screw in the screw in type? I'd hate to do that on my original carbs. Is there a way to change something on the Promax jet plate that would accomplish the same thing?



Try some fine wires in the MABs to see if that pulls the curve richer. I take some fine strands from a little piece of 16 or 18 guage wire. You can mike them, they usually come out about to .008"-.012". Stick one or two in each MAB and record a pass. The wire test will tell you if the MABs need to be smaller and maybe even by how much. And it's quick and easy. I do it all the time on both air and fuel orifices.

Master, again and still