RE: Jett 50 FIRE anygood?
I don't own a jett yet. But from the information on this site they are very strong motors, above your average sport engine. I own a Viper so I can give you information on the pipe. Being this plane is a high wing and the engine mounts on its side. A Fire engine looks like it would run the pipe right along side under the wing without much if any mods at all. That shouldn't be a problem on this plane.
Also if you don't want to break the bank a TT.40 or .46 runs great on this plane and they last a long time if you take care of it (No lean runs). My TT.40 is probably in the 115mph range all stock. This is my first Q500 type plane, so i'm taking baby steps towards a jett.
A Jett will take it into the 150+ range
Hope this helps, good luck
Russ