I havent put the stock muffler on it to see what rpm it is. it has less than one hour on stock ring. i was going to mess with it and fly some on sunday but was raining all day and the games were on.
I will run it on wed. at the field. I will run the stock muffler over the Bisson wrap around muffler to see the difference. I also got my Bowman rings on sat. I ordered them on friday. i will also test the two Bowman rings on same day.