Hi guys,

I'm running a Super Tigre 90 on E85 and ~10% Klotz Super Techniplate. We're using a CDI system for spark. I'm still trying to get the carb set right. The needle adjustment is very sensitive, a couple of clicks can make it go from too lean (engine won't pickup RPM when the fuel line is pinched) to so rich that the engine sounds like it is only running at 3/4 throttle when it is at WOT. It seems like most people are able to tweak their carbs enough to not have any major problems so maybe I'm missing something.

I have the fuel tank about 3 inches from the carb to keep it closer to the CG so I may try some tuning with the tail raised up to see if that makes any difference. I did see winspan99's post about soldering the spraybar and leaning out the midrange, I might try that but I don't know if that will make the top end less sensitive. My goal is to get the engine to run just a little bit rich as you would with glow fuel without having it unflyable. I already had one small crash due to it being too lean and quitting right after takeoff, enough of that!

I'd like to stay away from having to add any nitro as we're trying to keep the cost down. Any advise or lessons learned would be great!

Thanks,
Charlie