I agree, sounds like you dont have the engine tuned right.. If it eventually gets going good, I'd try leaning your LSN by a 1/12 and see if its any better.. Do that a couple times and if it doesnt change, put it back to where it was and try the same with the HSN.. Just watch the temps when leaning the needles cause if ya go too far it'll get too hot.. If it gets up tospeed pretty quick, but then takes forever to reach max, then start with the HSN, doing the same, and if thatdont work, put it back and try the LSN.. Basically just remember where the needles were before ya start and if adjusting one doesnt help, put it back and try the other.. I've got the S30 w/ SH .18, and it gets up and goes with both the 2 speed and the single speed..