I tried a T-fitting to add a return line to the tank and obtained no better results.
Poor idle (too rich), burbly midrange, etc. I tried a Perry regulated pump with the same less than stellar results. I tried many times to make a uniflow work with an RC carburetor to no avail. If you use the throttle at all, it rarely works correctly due to the behavior shown above. If you fly RC at WOT all the time, it works fine. The uniflow tank setup (carb line, vent line, exhaust pressure clunk line) was designed for non-RC applications - control line, free flight, etc. The tuned exhausts exhibited the worst behavior - fuel would actually spray from the exhaust on throttle up if it didn't flameout.
I have used stock mufflers, tuned mufflers, full tuned pipes, and even a tongue muffler.
I have used Uni-flow tanks for decades in both sport R/C flying, scale planes and and Q-500 pylon!So how do you prevent the muffler from loading with fuel after dropping to idle from WOT which causes the engine to run pig rich and sometimes flame out? Every engine I've tried it on exhibited this problem.
