I kept a sharp eye out for muffler cantidates. I have a bunch of old transformers. The shell halves on a less desirable
one worked great. I also used a piece of old shotgun barrel for the pipe. Now the solder won't melt!

This engine is running pretty good. IT tops out at 8K with a 22x8 Bambula and about 6800 with a menz 22x10. The idle is a bit rough. I can get it down to about 1800. I am questioning the ignition. I am absolutely certain the fuel side is good. The bearings and seals are new. The carb is a new HDA. The intake manifold is brand new, PFTE plastic, and fits perfect.

I carefully timed it to 29*. It did not give good power. I ajusted the timing by tach to, what turned out to be 36*, to give the better numbers. Could it be that it is not advancing properly? The ignition is a well known unit of which I own five. They are probably the most popular Chinese unit around. All work well. This one has less than an hour on it. Would this be a candidate for replacement by the vendor? I hate to tear into an airplane to get a known good unit but I guess I will late next week.