ORIGINAL: Steve108

OS 40 LA
MAS 10x6
Morgan Fuel Omega 15%
17% oil 30/70 castor/synthetic
OS 8 plug
38 deg F, dew point 18 deg F, density altitude approx 750' below sea level
Stock muffler, no baffle, long (~3') rubber hose extension (to keep the neighbors happy)
Mildly ported sleeve

12,900rpm tuned for flight (3 clicks rich, probably -300 rpm)

I'll try to post the numbers with no extension and peaked when I get a chance.