you can always use the throttle to control the engine. I don't know...i think that's what the throttle stick was design for.
You're ganna go through the trouble of hooking up a servo to the carb and dial it in and stuff..you might as will use it.lol
How do think guys get trainers to torque roll ?
You can also change prop size ...I don't know, that's what a the hobbie store was built for.

Just don't do evasive manuvers at great speed.lol