The Alpha Truggy Engine - no bottom really ? ? ? I brought one when Truhe start running Orion.......... I didnt like the thing, it was to much bottom IMO. And it was off and on, couldnt get control of the throttle on that thing.
Just make sure the modder you get, have ample experiance with that engine.. I have had engines messed up by modders who never touched my particlular engine, just an FYI bud