Made a new purchase
May 23, 2011 | 11:56 PM
#82
Teamspeed Pro
Joined: Mar 2010
Posts: 4,454
From: Pennsylvania
When you down shift normally (in performance driving especially), the speed of the engine (RPMs) rises from a lower RPM to a higher RPM very quickly. This causes the car to jolt, and the tires to cherp (the engine speed doesn't match that of the wheels). Sometimes in racing a car can even spin out or go off track because of the imbalance. When you "heel and toe" you lightly blip the throttle when you have the clutch pedal pressed in and are down shifting. This raises the engine speed gradually, and avoids the instant 4k-8k rpm jolt. Thus making the down shift smooth. Seldom do racing drivers ever not heel and toe.
Kind of hard to explain, hope I helped!
BTW, watch this video. See as he blips the throttle upon downshifting?
YouTube - ‪Porsche Carrera GT Heel-toeing‬‏
Last edited by Carrera; May 24, 2011 at 12:01 AM.
May 25, 2011 | 09:57 AM
#84
Teamspeed Pro
Joined: Nov 2010
Posts: 2,463
From: Singapore
I've never driven a car, but here's why.
When you down shift normally (in performance driving especially), the speed of the engine (RPMs) rises from a lower RPM to a higher RPM very quickly. This causes the car to jolt, and the tires to cherp (the engine speed doesn't match that of the wheels). Sometimes in racing a car can even spin out or go off track because of the imbalance. When you "heel and toe" you lightly blip the throttle when you have the clutch pedal pressed in and are down shifting. This raises the engine speed gradually, and avoids the instant 4k-8k rpm jolt. Thus making the down shift smooth. Seldom do racing drivers ever not heel and toe.
Kind of hard to explain, hope I helped!
BTW, watch this video. See as he blips the throttle upon downshifting?
YouTube - ‪Porsche Carrera GT Heel-toeing‬‏
When you down shift normally (in performance driving especially), the speed of the engine (RPMs) rises from a lower RPM to a higher RPM very quickly. This causes the car to jolt, and the tires to cherp (the engine speed doesn't match that of the wheels). Sometimes in racing a car can even spin out or go off track because of the imbalance. When you "heel and toe" you lightly blip the throttle when you have the clutch pedal pressed in and are down shifting. This raises the engine speed gradually, and avoids the instant 4k-8k rpm jolt. Thus making the down shift smooth. Seldom do racing drivers ever not heel and toe.
Kind of hard to explain, hope I helped!
BTW, watch this video. See as he blips the throttle upon downshifting?
YouTube - ‪Porsche Carrera GT Heel-toeing‬‏
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