Skip Barber Racing School: "Going Faster"
I am quoting from Going Faster, Mastering the Art of Race Driving
from The Skip Barber Racing School, page 93 and 94 (their photo)
"Heel-and-Toe
Since your left foot is on the clutch, and your right foor is on the brake pedal, you have to make some adjustments in order to blip the throttle. The way to do it is to adjust the pedals in the car so that with the ball of your foot pressing on the brake pedal ,there's a few inches of right foot left-over to roll your foot to the right and tap the throttle, blipping the engine up to the required RPM so that when the clutch comes out everything will be smooth and gentle. (see photo below)
This downshifting method is called "heel-and-toe" although, as we've just discribed, it doesn't involve your heel or your toe. The phrase was coined more than forty years ago, when many racecars had the pedals arranged so that the brake pedal was on the right, the clutch pedal was on the left, and [B]the throttle was between them and about six inches lower[/B]. Under braking, the driver had the ball of his right foot on the right-hand (brake) pedal and when the "blip" was needed, pushed down on the throttle with his heel - hence, "heel-and-toe". Pedal arrangements have changed but the term lingers on.
The pedals in most street cars aren't set up to facilitate heel-and-toeing, so drivers are forced to go through some real contortions to be able to touch the brakes and throttle at the same time. To do it right you have to do more than just be able to reach both pedals with the same foot. You need to accurately control how hard you're pushing on the brake pedal, a skill that's lost to many drivers who twist their feet into deformed postures to accomodate the awful pedal positioning in their cars."
And quoting [B]Jackie Stewart's[/B] [I]Principles of Performance Driving[/I], page 133.
"A word about the "heel-and-toe" technique for keeping the engine revving while you are shifting down gear. Heel-and-toeing never existed in the sense its name suggested: in real terms one just rolled the side of one's right foot off the brake pedal and blipped the throttle momentarily as required. Perhaps, way back in history, the initiator of this technique may have had a pedal configuration which literally required him to employ this technique, but the practical reality of the concept today simply involves the side of the right foot."