[fastd]

I agree with you guys about the pv at idle but the fact remains that the 6.5 4 window pv (previously I said it was a 7.5 4 window) did make it idle very richer. When warming up, feathering the throttle the vacuum did drop pretty easily below 6.5. It ran ok with the 2 window because the vacuum drop was momentary and the 2 window didnt drown it like the 4 window.

Anyway, I added a 50 cc acc pump on the back: didn't notice much of a difference except that throttle response is a bit better.

Also decreased the front Hsab from 34 to 28. Helped a bit at the margin I think.

Move idle a/f from around 13 to around 14.

Everything is very close but still have lean condition on WOT but getting closer.

Gonna next try a 3.5 or 2.5 4 window pv in the secondaries. I think that should be low enough not to upset my warm up idle and good enough to catch the vacuum at WOT. I have read on other forums that the pv may not be the restricting factor until pvcrs get bigger than .080 but my experience so far suggests otherwise. Gonna keep for now the 2 window 4.5 pv in the front.