"Never too fast? Really? Isn't why Indy drivers can't compete in F! and F! eats indy cars for breakfast. They just dont have the skills. Not all things are equal. Seen too many fast mods and nitros get lapped by "slower cars".
So don't hit the throttle so hard...genius.
If you don't give it full throttle, it goes slower...duh! Or, if you can't control yourself, try limiting the EPA. Brushless is so efficient, you could run the 5.5 all day long at half throttle and be alot more efficient than a brushed motor. Indy guys and F-1 guys go to the same school, and who cares about F-1, this is RC racing...
I don't know anyone whose gone to RC racing school.