Hi Mr. Cox thank you for checking in,
There is a RC Carb on the Norvel I need to remove that portion of the muffle (it did come from a heli engine I have). I may try to tap out the side tube and press fit a 9mm ID aluminum tube over that area to block off the open holes or just dremel off that entire section just in front of the side tube.The AME Norvel has a Nelson head conversion, Im guessing on the watt range hence approximate 50w to 150w. If you have dyno data with a Nelson plug please share.