ORIGINAL: crtmmac
I have the TF P-47 with the G62. I'm running a Zinger 22x10 with a stock muffler. The muffler has 3/8 pipes (about 2 inches long) welded to the holes in the muffler. I removed the straight sided carb stack. I'm geting just 6000 RPM. I have tried all the tuning tips but 6000 is the max. I have heard of folks pulling out the baffles in the stock muffler. Is this doable, worth doing? I'd like to keep th muffler because it fits the hole in the cowl. I plan to try a 20x6x14 as suggest above. But any other info would help.
thx
/colin
Well, try a test run on the ground with the muffler removed and open exhaust. You should see well over 7000rpm on that prop. If so, you will know where you are having problems. There is very little you can do to increase power if the exhaust is corked up. If you really want to try ripping the baffles out of your muffler, go for it.
Mark