Double Clutchng - Please explain

[TZENU]

Originally Posted by nat_daly

it's used alot in racing, especially drifting.

I think your confusing double clutching with a compression lock......

I did try it a couple of times in my T but it didn't work too well; was popping the clutch out too late

[superpursuit83]

Originally Posted by sprjenkins

No your right, the brake pedal sits higher in my BA XR6T, makes it hard to blip the throttle with your heel and when you do hit the throttle the throttle response is crap because its electronic and not very sensitive.

I'm kinda wondering if its even worth learning in the BA because its so hard to do.

Its not that hard and if you have a flash box you can set up the throttle with a 1:1 response and make it so much nicer.

In the B series I just put 3/4 of my foot on the brake and twist my foot to push throttle. Using side of foot. Hard bit for me is getting my left foot onto the brake around the steering collum

[tetgreg888]

I do this all day every friggin day in my truck. you don`t fully disengage the clutch when changing gears, just enough to get out of gear and give the go pedal a squirt , about 500 - 600 rpm above your currant rpm, light squeeze on the clutch again then it should drop easily into gear thats downshifting. With up shifting you clutch the same but try to complete your gear change before your revs drop by about the same 500 - 600 rpm. It also depends a bit on your road speed. I now couldn`t be frigged with clutches so I change gears up shift without using the clutch and down shifting I use the clutch but slow down using the brakes then miss 2 or 3 gears. take a bit of practice and even now after 10 years you still it up occasionally

[sleekism]

Originally Posted by ken2903

Not sure about racing but for someone driving a modern car on the road the main benefit is that it increases the size of the drivers ego and is a good skill to boast about on the internet and other places.

I'm not seriously having a go at anyone but whenever this subject comes up on an internet forum the responses seem to descend into some kind of primitive, body part measuring contest :

Like i said, i'm not having a go at anyone, its just something amusing that i've noticed.

EDIT: I've tried it a few times in my BA but as someone posted earlier, the brake feels way too high. I've got bigish feet but it feels like i need clown shoes on. Tried it once or twice in my old work car (90's rodeo) and while the pedals in that felt perfect, i was still pretty bad at it

EDIT2: I guess that means i don't measure up

Yes the first time I experienced "double clutching" in a car was from a ricer who would rev his piece of junk Hyundai out between gear changes.

I could see no benefit in it whatsoever.

[XR6WGN]

It's something I'm going to have to learn one day - my father-in-law has a 1939 Willys sedan which is sitting in the back of his garage - it was restored sometime ago and I am thinking about getting it back up and running. Whilst i've been driving manuals for years - it'll be interesting to see if I can "master" a non-synchro box!

[XR06T]

i find my brakes have enough of a dead zone to line the brake and accel pedal up, and like john said, its more of the use of the side of the foot in a ba than heel and toe. LHS of the foot on the brake, RHS just touching the accel.

double clutching is defn not required in a car with syncros. bringing the revs up with the clutch still engaged works just as well.

[snakeoil]

I'm kinda wondering if its even worth learning in the BA because its so hard to do.
__________________
Guys pretty easy in late model cars except if you have size 12 feet.Near on impossible in early OZ cars and as I said for the guys driving autos left foot brake

Smooth equals fast and as one poster mentioned a rough change down will really upset a bike which equals hello trees cows barb wire fence good bye gonads

Cheers

[Sloth]

Originally Posted by Dezza!

It's kind of like getting reverse in the EA. It doesn't have a reverse synchro, so if I try to force it, it'll crunch. Be gentle and it usually goes in pretty easily.

In my EB gently takes too long. I quickly formed a habit of slotting it into 4th, then reverse, and it goes in smooth as. I know why but it works. It makes me cringe when anyone else drives my car and crunches the hell out of it trying to select reverse.

[old_mate]

for all those out there who cant heel toe a BA dont worry, i can't either. my old EL was way better for it.

however you will notice most racecars have pedal boxes far different to a normal road car, its very easy to do it when the pedals are in the right spot. a mate let me steer his Gemini race car that he modded the pedal positions, was real hard to drive at first because the throttle and brake were pretty close together but you soon got the hang of it and man, it was real fun.

[NC1183]

I 'heel-toe' in my AU ute on downshifts. Had one of the guys at work say about it to another bloke there and i said to go and try changing down gears in a hurry and not have the car jerk and shudder when you release the clutch, he rides motos so you'd think he'd understand why. Sounds and feels 'mean' to the driveline.

When i'm in the truck i drive like tetgreg888, generally no clutch on the way up and clutch out - no clutch in going back down gears, found it heaps easier to get into gear on the way down without the clutch.

[snakeoil]

practise practise practise once you have learnt it you can do it almost any car and you will notice how much difference it actually makes.

An associate of mine has recently bought a very high powered car but cant heel and toe or left foot brake...................wont be long now before he and the road part company.Compression lock up in a high speed corner speed equals terminal oversteer

[Dezza]

Originally Posted by Sloth

In my EB gently takes too long. I quickly formed a habit of slotting it into 4th, then reverse, and it goes in smooth as. I know why but it works. It makes me cringe when anyone else drives my car and crunches the hell out of it trying to select reverse.

Yeah, my method usually works but not always. Once in a while I put it in 5th, then into reverse. I find 5th works just as good as 4th.

[lukep]

Originally Posted by ken2903

Not sure about racing but for someone driving a modern car on the road the main benefit is that it increases the size of the drivers ego and is a good skill to boast about on the internet and other places.

I'm not seriously having a go at anyone but whenever this subject comes up on an internet forum the responses seem to descend into some kind of primitive, body part measuring contest :

Like i said, i'm not having a go at anyone, its just something amusing that i've noticed.

EDIT: I've tried it a few times in my BA but as someone posted earlier, the brake feels way too high. I've got bigish feet but it feels like i need clown shoes on. Tried it once or twice in my old work car (90's rodeo) and while the pedals in that felt perfect, i was still pretty bad at it

EDIT2: I guess that means i don't measure up

It helps reduce wear and tear on your clutch a bit to.I do what your on about on freeway after coasting down a hill.i bring revs up to speed let clutch out.No friction

[ebxr8240]

On a modern car just a blip on throttle is enough to prevent compression lock up. In most cases people don't even double clutch properly.. Gear boxes have much closer ratios now.. I often do it if I change down two or three gears at a time especially turning into corner or roads look like they have oil on road..Like going over blue mountains etc..

[3vXT]

I think some people (myself included judging from the edit in my post) are confusing 'double clutching' with 'heel and toeing'. They are two different things aren't they? I realize you can combine them but they can be mutually exclusive too.
Every Endurance round of the V8's i've ever seen shows the pedal cam view with the drivers banging though the gears on the way up and heel and toeing on the way down, i've never seen them double clutching.