Hey DM what size prop is that? I have a stock 46fx, and I was thinking of putting on a tuned pipe to get more power for my fazer as it struggles to put out of a hover. Is the tower muffler as good as a pipe?
Ive got a 12x4 APC ona 3.75lbs Uproar 40. I can hover the thing on the deck at 1/2 throttle, and rocket out of a hover.
Taking the baffel out of the stock muffler will add power, but reduce smooth idle, and smooth throttle transitions. The engine will also quit more (trust me i tried it!)
Hope i helped somewhat,
David