To Rambo:

I purchased/owned the first Quadra 35 sold in the U.S. Also was the very first Quadra dealer, and introduced that engine to modelers world-wide 28 years ago, in 1976. We've come a long way since then - but that was the start. The settings for a Q35 are .010 coil gap; .015 point gap; and .025 spark gap. I used to gap the points at .012/.013, and that would increase the RPM of the engine like crazy. I had one engine that would turn an 18/10 Zinger (old style - very thin blade) at 8500, and using a sound tachometer, it would turn close to 10,500 in the air at wide open throttle. If you don't crash the engine, it will just get better and better with time.