Which was the biggest surprise?
I have always tested my engines on a 9x8 APC and while the fuel % was different on a couple I think you guys will be surprised at how they ranked in my little corner of tach numbers---
Go ahead and rank 'em if you like then I will post the RPM figures I got a little later- In no particular order<>
The OS-50SX used a Tower muffler
OS-46FX Tower muff
The OS-50FSR (Heli) used a Bisson strap-on muffler made for a .90
The K&B was tested with stock, OS-35FP muffler, and Ultra Thrust mufflers
Webra was stock muffler
Rossi's with mini-tuned pipe
SJ-50 with Sport (Red) muffler/pipe
Enya Stock