SS said:
Another question...
Is the Z230 the only heli out there that uses the standard Zenoah 'box' muffler? The Xcells I've seen always seem to have different exhausts (a round canister exhaust) etc.
Maybe that could be why the Z230 doesn't seem to have the punch?

SS,
You can always see better performace with a better designed muffler than the box A certain amount of back-pressure does some good things to an engine..It seems that Bergen may have an answer for you z230 drivers out there with their new muffler...

I do like the idea of breaking the engine in with a box, to keep the back-pressure to a minimum so the needles want be so sensitive...
Regards,
Bill