i ran it again yesterday and leaned both needles out some. we got it to 6000 rpm max. the only thing was, even with over a quarter turn on the high end needle, i could not get the rpms to drop any lower than 5950. i ran it like that for 5 flights and it ran great. didn't seem hot either. i am using an NX 24-10 and a pitts muffler. not sure of the make.

how many more rpms can i expect to gain after 10 gallons?