Thunder Tiger's rpm
Today I tried out my new TT I had on my funstar, and put it on my F-20 with my Dubb Jett muffler. I was amazed when I got 15,000 rpm sitting on the ground! And it was a little on the rich side. So in the air it's probably unloading another 1,000-1,500 rpm!
My other TT I had on it before was 7-8 years old and more worn out. The highest I saw on it was about 14,000 rpm. But I had a few too many lean runs on it.