Convert to replaceable idle air bleeds?

DrCharles said

Yes, I have a wideband gauge on the dash ;)
Once I get a clean transition, then I'll start going after the PVCRs. Cruise on the mains is good and lean (14.5-15.5).
First step is to put an 8.5 or 9.5 PV in, since I now know that Holley's rule of thumb is completely wrong (there's a 4.5 or 3.5 in there now!)

Click to expand...

I am currently basing my power valve selection on 1/2 idle vacuum, but am going to change it based on 1/2 cruise vacuum.

I have a good article regarding drilling, tapping and relocating the power valve channel restrictors to the bottom of the metering block, but I will have to dig for it. It made a noticable improvement in stabilizing my A/F ration at idle with the large cam I am running.