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white86 Regular Location: Brisbane Registered: May 2004	Re: Double clutching? Sun, 14 August 2005 05:20 mithy, what you say is true - double clutching is a way of caring for a sick gearbox and stopping it from chrunching in some cases. However, can I just make the definition between double-clutching and heel-and-toeing clear? Both of these practices refer to changing DOWN gears, ie 4th to 3rd. DOUBLE CLUTCH - Driving in 4th gear. Throttle completely lifted. Clutch in. Shift to neutral. Clutch out. Blip the throttle. Clutch in. Shift to 3rd. Clutch out. HEEL AND TOE - Driving in 4th gear. Right foot presses the brake peddle with toes. Clutch in. Shift through neutral directly to third gear while rotating the right foot and tapping the throttle with the heel/side. Then immediately lift the left foot of the clutch. This whole process is sort of a fluid motion. Can also be done without the braking, ie to shift down to go up a hill. Both of these techniques aim to ease the box into gear and reduce driveline stresses/associated compression lock by matching engine revs to the lower gear. By this I mean that driving at 60km/h in 4th gear, engine revs might be at 2500 rpm. However, at 60km/h in 3rd gear, the engine might be pulling 3500rpm. Therefore the blipping of the throttle in both techniques aims to raise engine revs by this amount (as loss in road speed is negligable). Doing so stops the engine from being forced to speed up while the clutch is being released. In a racing situation, heel-and-toeing allows very quick downshifts, and you don't have to worry about slowly letting the clutch out to avoid lock-ups. Sorry if I am being overly simple, there just seems to be a lot of confusion in the above thread. [Report message to a moderator]

	Subject	Poster	Date
	Double clutching?	#Fiend#	Sat, 13 August 2005 11:50
	Re: Double clutching?	CrUZsida	Sat, 13 August 2005 12:04
	Re: Double clutching?	Cool1	Sat, 13 August 2005 12:26
	Re: Double clutching?	Corona RT142	Sat, 13 August 2005 13:03
	Re: Double clutching?	kingmick	Sat, 13 August 2005 13:52
	Re: Double clutching?	verbatim210	Sat, 13 August 2005 14:31
	Re: Double clutching?	justcallmefrank	Sat, 13 August 2005 14:40
	Re: Double clutching?	mithy	Sat, 13 August 2005 15:14
	Re: Double clutching?	verbatim210	Sat, 13 August 2005 23:07
	Re: Double clutching?	79rollaboy	Sun, 14 August 2005 01:05
	Re: Double clutching?	xolent	Sat, 13 August 2005 15:28
	Re: Double clutching?	dizzy	Sat, 13 August 2005 15:49
	Re: Double clutching?	TougeVitz	Sat, 13 August 2005 16:04
	Re: Double clutching?	mc68	Mon, 15 August 2005 23:29
	Re: Double clutching?	cannonball	Tue, 16 August 2005 04:32
	Re: Double clutching?	SIMDOG	Sat, 13 August 2005 16:11
	Re: Double clutching?	river	Sat, 13 August 2005 22:01
	Re: Double clutching?	Evan	Sun, 14 August 2005 03:20
	Re: Double clutching?	Corona RT142	Sun, 14 August 2005 01:08
	Re: Double clutching?	79rollaboy	Sun, 14 August 2005 01:23
	Re: Double clutching?	jackel	Sun, 14 August 2005 03:05
	Re: Double clutching?	kingmick	Sun, 14 August 2005 01:35
	Re: Double clutching?	finney	Sun, 14 August 2005 01:39
	Re: Double clutching?	white86	Sun, 14 August 2005 03:55
	Re: Double clutching?	bubbles	Sun, 14 August 2005 04:12
	Re: Double clutching?	86DRFT	Tue, 16 August 2005 06:15
	Re: Double clutching?	white86	Sun, 14 August 2005 04:14
	Re: Double clutching?	bubbles	Sun, 14 August 2005 05:34
	Re: Double clutching?	oldcorollas	Sun, 14 August 2005 05:55
	Re: Double clutching?	Dorio86	Sun, 14 August 2005 06:17
	Re: Double clutching?	feral4mr2	Sun, 14 August 2005 08:27
	Re: Double clutching?	mithy	Sun, 14 August 2005 05:06
	Re: Double clutching?	white86	Sun, 14 August 2005 05:20
	Re: Double clutching?	oldcorollas	Sun, 14 August 2005 05:33
	Re: Double clutching?	Rona_Drifter	Sun, 14 August 2005 11:12
	Re: Double clutching?	kingmick	Sun, 14 August 2005 08:08
	Re: Double clutching?	unforgiven	Sun, 14 August 2005 08:13
	Re: Double clutching?	ae86drift	Sun, 14 August 2005 08:38
	Re: Double clutching?	Arch	Sun, 14 August 2005 10:53
	Re: Double clutching?	KOPDIS	Sun, 14 August 2005 11:29
	Re: Double clutching?	#Fiend#	Sun, 14 August 2005 12:18
	Re: Double clutching?	Corona RT142	Sun, 14 August 2005 23:03
	Re: Double clutching?	Rona_Drifter	Mon, 15 August 2005 11:50
	Re: Double clutching?	tricky	Sun, 14 August 2005 13:49
	Re: Double clutching?	Shraka	Mon, 15 August 2005 12:06
	Re: Double clutching?	jesseT18	Mon, 15 August 2005 12:20
	Re: Double clutching?	kingmick	Mon, 15 August 2005 23:15
	Re: Double clutching?	Blown86	Mon, 15 August 2005 15:03
	Re: Double clutching?	Mookie	Tue, 16 August 2005 02:07
	Re: Double clutching?	rthy	Tue, 16 August 2005 02:24
	Re: Double clutching?	EvilJack	Tue, 16 August 2005 04:46
	Re: Double clutching?	Smokey228	Tue, 16 August 2005 04:11
	Re: Double clutching?	ke382TG	Tue, 16 August 2005 04:16
	Re: Double clutching?	Corona RT142	Tue, 16 August 2005 04:34
	Re: Double clutching?	cannonball	Tue, 16 August 2005 04:38
	Re: Double clutching?	Corona RT142	Tue, 16 August 2005 04:40
	Re: Double clutching?	cannonball	Tue, 16 August 2005 04:44
	Re: Double clutching?	Merudo	Tue, 16 August 2005 05:22
	Re: Double clutching?	Merudo	Tue, 16 August 2005 06:18
	Re: Double clutching?	86DRFT	Tue, 16 August 2005 07:37
	Re: Double clutching?	mc68	Tue, 16 August 2005 15:48
	Re: Double clutching?	cannonball	Tue, 16 August 2005 23:07
	Re: Double clutching?	Corona RT142	Tue, 16 August 2005 06:18
	Re: Double clutching?	86DRFT	Tue, 16 August 2005 07:21
	Re: Double clutching?	Shraka	Tue, 16 August 2005 07:45
	Re: Double clutching?	cannonball	Tue, 16 August 2005 06:28
	Re: Double clutching?	kingmick	Tue, 16 August 2005 08:38
	Re: Double clutching?	tricky	Sat, 20 August 2005 08:59
	Re: Double clutching?	mc68	Tue, 16 August 2005 23:14
	Re: Double clutching?	Corona RT142	Tue, 16 August 2005 23:17
	Re: Double clutching?	cannonball	Tue, 16 August 2005 23:35
	Re: Double clutching?	Corona RT142	Tue, 16 August 2005 23:40
	Re: Double clutching?	#Fiend#	Wed, 17 August 2005 11:07
	Re: Double clutching?	RWDboy	Wed, 17 August 2005 22:43
	Re: Double clutching?	Siktoy ra23	Fri, 19 August 2005 09:53
	Re: Double clutching?	tricky	Sat, 20 August 2005 08:53

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