Quote:



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



I will have to check vacuum and get back to you
on that. The primary PV I have is a 5.5 standard
not a high flow valve. I run 11 InHg at idle so
I thought that would be really close to the right
one. I've jetted the carb from the stock 65's to
68's because it was running well into the 16's
at 2500 rpm before and now it's right about 14.5

I will get it out on the highway and see if it
gets richer, but from memory it doesn't cruising
but running wot for extended time get it down into
low 11's. I have 68's in the secondaries but
didn't want to go smaller yet. Initial wot gives
a low 14 for about 2 seconds then she goes to
low 11's. Should I wire shut the secondaries and
see how it goes? was thinking she would run way
lean at higher rpms.