Hey guys
After doing some searches i am finding that my sk 90 has basically the power of the 120 size 4 strokes
With 5% fuel and a tower muffler i am getting
9300 15-6
8500 15-8
9200 16-4
All of this is running rich (nice smoke trail out the muffler) and only 3/4 of a gallon through it. I have heard that they gain power over 2-3 gallons of gas.

All of these props have instant spool up.

I can't wait to try the APC 16-6 i ordered
Plus, at 5% nitro i am getting great fuel economy and it is cheap too.