These engines run awesome. Lots of power through the mid-range and very easy to drive. Runs incredibly with a Jammin' JP-1 pipe and header.
I got 10 minutes and 15 seconds of run time with my engine during the A-Main warm-up yesterday at the Nitro Challenge; be aware, however, that you will not get that kind of run time if your engine is too rich, as I found out...haha.
Aaron Waldron - LiveRC