earlwb

I was thinking that if the cam timing is looking good, then maybe the valve adjustments are off. Too large of a gap can cause a power loss too.
wow! 30% nitromethane in the fuel, sheesh, I find 5% suits my engines just fine. I used to use 25% and 30% or more for pylon racing years ago, not sport flying.
it has me wondering if you have some detonation going on or not.