Quote:

What I actually said is that the mains circuit should have no effect on idle.



Jack, I don't disagree with you regarding the mains at idle, however what you wrote (in part) was "Neither of those items should affect idle...", & the only other item that I attributed a slight improvement at idle, all other things equal, was loss of the shim. I actually went up a size on the main, lost the shim, & the idle improved with no other changes.

FWIW my reply wasn't directed solely to you. My "what happens if the needles are removed" question regarding idle mixture was only to illustrate a point with an extreme example that one can either accept or reject on its own merits.

The dyno is the easy way out, however it is not the only way. This is entertaining to me...