Some new Tower .75 numbers with and without a Jett-Stream muffler.

all with 15% cool Power. all APC puller props.

With Tower 75 muffler

11x7 - 13,500
11x8 - 12,800
12x6 - 12,600

With Jett-Stream Muffler

11x7 - 13,600 - 100 rpm gain
11x8 - 13,150 - 350 rpm gain
12x6 - 13,000 - 400 rpm gain
12x7 - 12,575 - ? didn't test the 12x7 with std muffler.

Bil