Thanks Bax!
I will try less nitro, reduce the compression, improve the air flow near the cylinder head. The only item I can not change is the length of the muffler: it goes inside the the tank compartment. I am not using a resonance pipe. Thats why I need to know how to be sure that the costomized muffler is delivering enough pressure to the fuel tank!
Is there any way to check that?
Thank you.
Geared