Nezz10

Now I have almost mastered my heel/toe driving I wanted to try this double clutching malarcy.

Anyone know what it is, how to do it and what good it is?

Dave T-S

It is where you depress the clutch, move the gearstick to neutral, blip the throttle, then depress the clutch again and select the gear you want as normal.

Double declutching is an anachronism from when gearboxes did not have syncromesh ("crash" boxes), and you had to synchronise the gear wheel speeds in the box yourself so they didn't crunch.

If you heel and toe and drive a modern car there is no need to double declutch - the synchro does it for you.

darlodge

Dave T-S, what are the benefits of double clutching?

Darren

JGRIFF

Dave's nearly got it right, follow his procedure on the down changes 6-5-4-3-2-1 where the output side is revolving more quickly than the input side, but on the up changes 1-2-3-4-5-6 you don't need to blip the throttle as the output side is revolving slower than the input side. The whole idea is to let the input shaft and the output shaft to rotate at the same speed. Because of gearbox inertia (drag/friction)rotational speed differences build in milli-seconds. Dave is right modern synchro rings do the job for you, but you can still make the changes smoother by double de-clutching, the downside is slower gearchanges. it's worth practicing however, because when you get it off pat, you can drive the car even if the clutch cable has gone ( a good skill to get you home)

Steve001

iTrader: (7)

Nezz

You got a Wagon, right? :d

Nezz10

No mate, I've got a MY00 in dark metallic blue. 18" BK's Full HKS system and filter, Eibachs and link.

Nezz10

Sorry, missed the answer to your question. No I do not have a wagon it is a saloon. Why do you ask?

Dave T-S

LOL at John - that was my abbreviated reply as I was off out

PS John - don't assume everyone's got a 6 speed box like you

Darren
John's summed it up, but not many benefits to double declutch with modern cars (it was useful with the first car I drove, a 1957 Austin A30 ).

nigelward

So in a 5-speed it's 5-4-3-2-1-R

JGRIFF

Dave, I was showing off!!!

No In a 5 speed car it will be 5-4-3-2-1-R-CRRRUNNCCHH collect small cardboard box from boot, get out of stationary car, collect gearbox pieces from side of road behind you!!! You MUST stop before engaging reverse.

Shark

Err with the clutch cable gone pressing the clutch pedal will do nothing

David