Originally Posted by
NoOneFlysAtMyClub
I have a .32 with carb mounted needle valve. Runs great on the muffler and screams on a Mac's pipe set up. Idles and transitions as good as any other engine. I have two .61's that I have not run yet. Hope they run as well as the .32.
Tony
The GMS engines are hard to beat on power. The biggest caveat to them is whether the carb operation is on the money or not. I got my .47 nearly new and free. That means I'm not broken hearted if I need to make mods to it so she runs right. Top end of my .47 blows the doors off my TT Pro .46 by 500rpm on the same prop, fuel, plug, and muffler. They're equipped with a real chromed liner too (if ringless), not too shabby for a "cheap" engine.