JCM900

ok we all heard the famous line from the fast and the furious.... "Granny shifting, not double clutching like you should." ok.... so what is double clutching any way... a friend tried to explane it, but i dont get it.... is it worth even learning

Hyghgynx

It's when you fake a shot once and shoot it the second time all while in tha air in basketball.


Wikipeida is your friend...

Double Clutch

Pacer

How do I double clutch? I never thought you'd ask.

1. Push clutch pedal down
2. Shift to neutral
3. Lift clutch pedal up
4. "Blip" throttle to raise engine speed, "engine half" transmission speed
5. Push clutch pedal down
6. Shift into lower gear
7. Lift clutch pedal up

Lol got that from Honda forum.

ZTC

not good to laugh at your own jokes
especially when they suck...
jk
anyway i think its when you shift and while clutch is engaged you rev your rmps or something to get a better shift idk.
i heard it a while back on a tutorial but i dont remember.
truck drivers use it alot tho if i remember correctly

BionicJuic3

somewhat... you dont need to take it into neutral you can just hold down the clutch, rev the engine and shift weather your going shifting down or up

InfideL

you don't need to double clutch with a synchronized tranny

chrisNOF

Try this on the highway in 5th gear when your going about 70mph. Gas it in 5th and stomp on the clutch at the same time. That way you get a feel for it. After you get the hang of it try it in all gears. All it really does is give your car a little push.

captainlaziness

Did you watch the video? That guy's practically dancing on the pedals.

kungpaosamuraiii

Yea that's fine but that's not double clutching. Like someone said, it's not necessary to double clutch on the up shift on synchronized cars. Since the engine is connected to the wheels with three components and two linkages, double clutching lets you set all of them at the same speed. The first part is the engine. That's simple rev matching. The second part is the transmission (I don't know how to really accurately describe this part) and this is what you would need to synchronize with everything else in the absence of synchros. You shift it into neutral and then rev the engine to match the wheel speed. When you shift into neutral and let go of the clutch, the engine is attached to the transmission so you rev that whole assembly up to match the wheel speed and everything is synchronized.

Edit: Right. Double clutch is ONLY the the clutch in/out action. The rev matching is optional for down shifting. That's the only time that I double clutch.

engifineer

Clutch in, shift to neutral, clutch out and then back in, shift to gear, then release clutch. Just revving while shifting is called rev matching. When downshifting on a non-synchronized transmission you double clutch AND rev match. They are not the same thing.

And no, there is no reason to double clutch a synchronized transmission... unless you synchros are trashed

Blacklistcustomz

its really called heel-to-toe downshifting or upshifting. you push the clutch in, with the other foot half on the brake, throw your leg over towards the gas to rev it, shift, take out clutch and there ya go. I went to a skip barber racing school and thats what they said

engifineer

But that is still not double clutching. Heal toe is rev matching, double clutching is a different thing.

Varsis

see though you can just pull back out of gear on most modern transmissions though, clutch in, gear in, clutch out.
i would think that might not be "HEALTHY" for your tranny.
and if you'd really like you can just just rev THRU the shift.
if you shift quickly you wont over rev the motor.
as dumb as all this sounds.... wheeeeee

PlayinWithFire

you could do that but you arn't making your tranny very happy. at least rev match. Just blip the throttle so its up there and then let the clutch out.

Double Clutching = shifting into neutral, blip throttle, shift into lower gear

Heel Toe = clutch in with left foot, break with right toe and blip the throttle and shift while continuing to break (use right toe)

Rev matching - blip the throttle and shift.

jakedudeta

Double clutching = not something that 160hp car drivers need worry about. . .

PlayinWithFire

i took my tc to the track (lime rock) and despite being 10s of thousands less than the rs4s, porsches, and stis (heavily modded) I had a great time and learned alot about how cars should be driven. Surprisingly, those guys have a lot of respect for the tuners out there and would love to see some of the street racers take it to the track and fine tune their skills.

Learning this stuff is always a good thing because it will help you understand how to go fast an not necessarily rely on parts to make your car fast.

engifineer

Again... people are way off here.

Double clutching = RELEASING CLUTCH while in neutral after shifting out of gear then PRESSING THE CLUTCH again before shifting into the next gear. This is a shifting method for non-syncronized trannies.. it has nothing whatsoever to do with how much power the car has. It is not a downshift only technique.. you do it both ways if you have no syncros to help you out. You only blip the throttle on the downshift to match revs.

Heel toe is simply rev matching while braking.. that is it.

kjmira

^^ i'm going to have to agree w/ engifineer

PlayinWithFire

^^ i'd trust him he knows more than me. no kidding and no sarcasm is being used here.

engifineer

nah... I have just had pos cars with trashed syncros before