Sorry about the pic quality, I took those last nite on a whim. The 80 is a four stroke, and after new bearings and many hours of playing with it(perry pump, no perry pump, insualted tubing exhaust, etc), I had it running like a top with a 13/7 13/8 APC prop on a Kyosho Majestic). That plane didnt take too well to running thru a stand of birch trees, so the engine was looking for a home. By going with the can, I was able to get muffler pressure on it, and have removed the perry pump. I have been testing it in the driveway with a zinger 14/6 wood prop, and went from 8300 to just about 9700 with this can. I also have a much broader needle valve on it too. I now have an APC 14/4 on it, so the RPMs should go up a tad more.

Steve