How to dubble D clutch

[Mr Revhead]

At speed i find it quicker to (heel-toe) double de-clutch

what????
heel and toe, and double clutch are two different techniques.....

double cluthing is used in trucks and f**ked boxes.

heel and toe is when you hit the clutch and while using right foot on brake you 'roll' the foot to blip the throttle to match the engine to the box, thereby using your right foot on both the brake and accel at the same time.
normally a racing technuqie but usable on the road.

watch the v8 supercar racing, they quite often show good close ups of the pedals there, youll see that on the down change all three pedals are used at once. and there is no on/off the clutch during a change. thats heel and toeing.

to see a demo of double cluthing go for a ride in a truck.
some one asked this same question in an interveiw with craig lowdnes. his reply was:

i heel and toe in the race car, double clutching is some thing i do on my tractor

sums it up really

[fatgtr]

flag double clutching it's not required on the road. most modern cars have syncro gearboxes these days making double clutching pointless. if however you are really keen then go ahead.

[Stealer Of Souls]

You can heel-toe double de-clutch. It would be the ultimate in hardcore techniques... But could have some serious use for the track.

[Al]

You can heel-toe double de-clutch. It would be the ultimate in hardcore techniques... But could have some serious use for the track.

why bother? u have already rev matched with blipping the throttle in heel toe, its more retarded than hardcore

[Lloyd]

when changing down, its clutch in, blip throttle, shift down, then release clutch, works perfectly 90% of the time

That only matches engine speed to what the gearbox output shaft speed will be, not what the gearbox itself is doing (synchomeshed gears and whatnot). Point of letting the clutch back out, blipping and then in before changing from neutral to the desired gear is to match the engine speed to the gearbox so that it locks into the output shaft easier without needed the synchros to get things to the right speed.

[Al]

Errr ok

i can pretty much get it sorted (meaning nice n smooth even tho ive just dumped my foot off the clutch) with just a blip before i let out the clutch on the downshift..and this technique would be 100x quicker than double d clutching estimated under half a second very easily for on and off the clutch...even quicker on the upshifts but thats because i dont rev on the upshifts

[Lloyd]

Be warned, I'm tired so the accuracy of the above statement may not be 100% correct.
But its how I understand it to be at this point in time.

[NZ_AE86]

Why? you will never need to do this!
It is when you push the clutch in and change out of gear into neutral and release the clutch then push the clutch in and select the next gear and release the clutch.

Errr.... I fail to see the point of it! You could cut out some of the steps by just pushing the clutch in, take it out of gear and put it into the next gear without releasing the clutch... Like normal people!

As you see I did not think he would ever need to use it but to learn you must ask the question and here I have answered it!

[RedMist]

The only advantage I could see to double declutching is it forces you to slow the change. A speedy change can most certainly damage synchros.
Most race boxes have no synchros and have straight cut teeth on all gears. You have to blip the throttle to engage gears, incorrect gear speed means you won't get a gear! Saying that you have to apply a heel toe technique to your road car because race car drivers do is bollocks. It's like saying you should heel toe an auto because the race car drivers do it in their straight cut box!

What you will get from a heel toe in any box is less weight transfer during deceleration. It's a technique that will get you faster lap times (on a race track) as you can brake hard and not lock the driving wheels during the "dead time" of deceleration and gear changing.

[Stealer Of Souls]

Be warned, I'm tired so the accuracy of the above statement may not be 100% correct.
But its how I understand it to be at this point in time.

That's pretty much what I understand about double de-clutching... makes sense to me...

Try double-declutch went you're shifting down without using brake...
And if you're on the brake use heel-toe...
Or just let the synchros do the job...
It's all personal preference really...
I use both techniques to help my box's synchros last longer... I should just get a tougher box... but hey... I'm cheap.

[UTERUS]

Yep, i had to blip the throttle changing down gears in my levin cos 2nd gear synchro was $&#$%, even when i got my new 'box it was just such a natural thing to do. I even do it now in my volvo.......
I suppose it does save your sycnhros and clutch giving the throttle a stab changing down gears, but changing up gears? Not sure about that.

[jr007]

The only time I ever used double declutch was in my old mini. gearbox requirement, no synchro. Grinding teeth when I f**ked it up used to scare the shit out of me

If I EVER do it on the street, please slap me.

BTW Heel-toe is dope if you can do it at hell speed on gravel, but if you do it driving to the dairy for milk, your are ghey. (unless it's practice for the track )