Quote:

Thanks guys, all good information.

I am having trouble wrapping my head around why my
carb runs perfect 14.5 at 2500 rpms at 5 mph but
at 3200 rpm at 702 mph it is running at 12.5
Since I am not loading the motor, should I not still
be on the primaries only? and the powervalve should
not be open either correct?



I assume you mean
14.5 - 2500 RPM - 55 MPH
12.5 - 3200 RPM - 70 MPH

Does it get progressively worse as you speed up even more? Which primary PV are you running, and what is the vacuum at 2500/55 and 3200/70. You can temporarily, as a test, block the PV with a plug and see if the problem persists.

If it's not the PV, and if it gets progressively worse (or doesn't lean out) as speed/RPM increases further, larger Main Air Bleeds may be in order. Be aware that larger MABs might cause it to run pig rich at very light throttle/load. How's the AFR now at 2-5% throttle at light load?

Jim