Drawing on the incredibly diverse knowledge of HAMB members... Our Kurtis KK500 runs a 235 Blue Flame 6 with a SCOT supercharger and is fed by what we believe are two Zenith 80BV10 carbs. We are getting it ready to participate in the Colorado Grand next month. We've found it burns a little rich at idle but seems really lean elsewhere as the exhaust pipe is really light colored after a drive. We wouldn't be too concerned if the engine wasn't supercharged but I'd rather be a little on the rich side at cruise and in boost. The idle adjustment seems pretty simple. Presumably the screw on the top of the carb with the spring under it... The big question is...is there some way to adjust the cruise mixture? Thanks!