Rcs
I've got a RCS 1.40 a bud had it on a10-11lb Extra and it flew it well, Ive only bench run it, a lil fudgin with the needle balance and it roars will turn a APC 16x8 around 9000rpm and it was rich. The Pitts is a bit loud at low rpms but tones down over 1/3 throttle settings. What were you thinking of hanging it on?