Thanks, I'll try that. You are right, in that I have noticd that the low needle is not too sensitive in it's effect on the low and mid-range running.

I basically leaned the low needle until the engine would "sag" in response to a quick throttle opening from idle, then opened it back up just enough to get rid of the sag. I then leaned the high down in very small increments until the top end started going lean, and response from part throttle was poor. At this point, very little change in the high needle makes a lot of difference in the mid-range and top end.

Your advice makes sense, especially for low and mid-range, since that is the only logical way to keep the high orfice from dumping too much fuel too early into the venturi. Of course, I would expect the top end to still be too lean under these conditions, but that doesn't concern me too much, as I expect to very rarely, if ever, use high rpms and high power in flying my Super Cub!

I'll let you know what I think after trying it. Can't do it today, though, we have a minor blizzard going on, and I test out in the open.

Thanks again,

AmpAce