I have several engines which were gas and converted to glow. This was the big thing a few years ago and you will get more RPM when converted. My best is a FPE 3.2 this is installed in an EXTRA 260. It uses plunty of glow fuel but performs like a top. Uses 5% nitro or no nitro at all. Higher nitro will make it overheat. I converted my 3W back to gas because on glow fuel it would run fine until you slowed the engine down to idle and when you raise the rpm again it was now running backwards. Engine did not make a sound when it reversed and went right up to 7500RPM. Kind of hard to land a 1/4 scale ship in reverse....