My local indoor clay track does not allow boost in any stock classes. I'm running 69/33(b4.1) and still coming off at no more that 105 degrees. Doing this with a Ballistic motor and Tekin in blinky mode.
2 weeks ago the announcer was calling me out in first round saying I prolly had it boosted...until after the round I showed him the blinks. So I'd say my setup is pretty fast.