I'll be getting my new G2300 tomorrow from Tower. Have seen for myself what this engine will do with the stock muffler. Pulls 10lb+ planes around with ease. Have also seen the trouble they can be running a Pitts style. The fix for this "I've heard" is going with a differant carb like a Perry or OS.
I'm going to run the stock muffler on this 1.20 sized Edge540T because the cowling was already cut for a ST muffler. At least it looks like it was.

"Oops,,,, just read the forum rules for Direct Support. Sorry about posting on someone else's thread."