footbrake racers

Hold it against the verter at 2200 and leave on last yellow. any higher and it tries to push the wheels thru the beams.this was with an mp 509 cam so off idle would be too sluggish. Cam didnt make good power till 2500 or so.A lot of it depends on your package. Leaving at an idle has to leave a lot on the table. I have never seen a pro class car leave off idle.