Bill Pemberton
0ld Ford Automotive Racing Terror
The whole concept of heel/toe downshifting is to keep the revs up when you are braking and going down through the gears. If you are just braking the rpms will drop , hence it will take time to get the car back up to the speed/rpms you were at before, so you in a sense overslow the car. Keeping the revs up gets you out of the corner faster and keeps the motor from falling on it's head whenever you brake --- this is the reason it is the method taught at virtually all Driving/Racing schools as it is intended to be one fluid motion. No offense , but I do not know of a single school that teaches a double clutch method , as it was a concept used 30-40 years ago with older gearboxes and clutches.