Just in case anybody is arriving late at the party and getting the impression that it takes a special brew to extract exceptional performance from the SAP 180, rest assured that excellent power is available with 87- or 89-octane pump gas, even with 10% ethanol mandated in this region of the country. I am using 89 octane pump gas, and with an APC 15.5x12W (my favorite prop thus far) and the ES 30G tuned pipe, performance with my 10.5 lb Focus II is absolutely superb.

Took delivery of my second SAP-180HP today, Serial #600! For my next pattern plane (whatever it might be) I already have the Macs header and will soon order another ES 30G pipe, and I also have the Tech-Aero IBEC and switch/reg and a couple of servos and some of the linkage bits. Got to build another soft mount.