Double Clutch

[MRulz]

Double clutch looks pretty cool to look at Lol.

It is only used for down shifts correct???

How many of you know the art and practice it? What are the real benefits of it??

Looks like actually loosing time to change a gear. I donot know how I would do that if I was racing on a track where you have to change gears so ofently.

[ANILE8]

I double clutch all my shifts in my Z4-MC.

Never get the 1st to 2nd gear grind with this technique and it is so built into my driving habit pattern now I don't even consciously think about it.

[psygnosis]

It's also known as rev-matching, when you down shift it's gets the engine RPM where it should be for that gear, results in a much smoother downshift.

[O-cha]

Useless, you're wasting time and are a bit of a tool (like the guy in the video) if you do it any other time but say, going into first gear while still rolling. Even then it's pretty unnecessary.

[O-cha]

Originally Posted by psygnosis

It's also known as rev-matching, when you down shift it's gets the engine RPM where it should be for that gear, results in a much smoother downshift.

It's not also known as rev matching, what you said is rev matching, what double clutching is is an extra step on top of that to synchronize the gearbox speeds with the soon to be new engine speeds.

It's for *downshifts*, in cars without synchros. Then idea of using the technique to downshift a synchronized gearbox is a level of ricer idiocy that boggles the mind.

[nickpapa]

Originally Posted by O-cha

It's not also known as rev matching, what you said is rev matching, what double clutching is is an extra step on top of that to synchronize the gearbox speeds with the soon to be new engine speeds.

It's for upshifts, in cars without synchros. Then idea of using the technique to downshift a synchronized gearbox is a level of ricer idiocy that boggles the mind.

100% correct. it drove me crazy when i saw the movie "fast and furious" and vin deisel said something along the lines of "you lost because you didnt double clutch". whoever made those movie are complete morons lol

[psygnosis]

Well I can't see the video (blocked at work) but I assumed it was something to do with matched downshift/heel-and-toe type stuff. If it was some Fast 'n Furious BS well then never mind.

[scottyD]

I double clutch all my downshifts. No need to wear the synchros in the transmission unnecessarily. As psygnosis said, it's a much smoother downshift too. Personal preference I guess. I prefer not to have a jolt of deceleration when downshifting, especially when moving to a lower gear to accelerate.

I wouldn't put much faith in anything that was said in fast and the furious.

I also cannot see the video, but regardless, double clutching on downshift is not an idiotic ricer concept.

[O-cha]

Originally Posted by psygnosis

Well I can't see the video (blocked at work) but I assumed it was something to do with matched downshift/heel-and-toe type stuff. If it was some Fast 'n Furious BS well then never mind.

It's not really, F&F bullshit, it's bullshit in F&F. It's a valid technique, for really old cars. Almost wholly useless in these times.


But it's clear the guy in the video just want's to be cool and impress people with his mad double declutching skills.

[O-cha]

Originally Posted by scottyD

I double clutch all my downshifts. No need to wear the synchros in the transmission unnecessarily. As psygnosis said, it's a much smoother downshift too. Personal preference I guess. I prefer not to have a jolt of deceleration when downshifting, especially when moving to a lower gear to accelerate.

I wouldn't put much faith in anything that was said in fast and the furious.

I also cannot see the video, but regardless, double clutching on downshift is not an idiotic ricer concept.

You're rev matching, not double clutching. Please do not come back saying "No I know what I'm talking about I'm double clutching" there's nothing wrong with confusing the terms like you did.

The jolt of deceleration you speak of when not rev matching and downshifting is located at the clutch not the synchros. It is by action of accelerating the engines RPMs by consuming the cars momentum, hence the sudden quick jerk of deceleration. Reason rev matching is used is to prevent wear to the clutch (not synchros) and prevent shock to the driveline.

[Rick Hunter]

Clutch??? What's that?

[MVF4Rrider]

I always blip the throttle when downshifting. All is required is blip while moving the gearshift lever with the clutch dissengaged. Habit from motorcycling. You don't need to double clutch to do that. In fact for motorcycling, it's impossible.

[M_Six]

Originally Posted by Rick Hunter

Clutch??? What's that?

Extend the life of your clutch.

Can someone explain the toothpaste on his face?

[Crimson92]

Originally Posted by Rick Hunter

Clutch??? What's that?

this tool bag annoys me

i hate people that drive leaning back like that


did his bf jizz on his face?


fucktard

[M_Six]

Originally Posted by Crimson92

this tool bag annoys me

i hate people that drive leaning back like that


did his bf jizz on his face?


fucktard

Really. He can barely reach the steering wheel. Quite the pimp.

[iranmeba]

does shifting without your clutch actually work?

[O-cha]

Define work.

[scottyD]

O-cha, good point with where the wear is occuring - there is probably some with the clutch as you said, but I think there is still some at the syncros as well.

You're rev matching, not double clutching. Please do not come back saying "No I know what I'm talking about I'm double clutching" there's nothing wrong with confusing the terms like you did.

I think you need a clarification.

For example:

In 6th gear, and I want to downshift to 5th.
Take foot off gas pedal and depress clutch pedal. (first clutch)
Shift to neutral and let go of clutch pedal.
Blip the gas pedal to give the engine and transmission some more revs.
Depress clutch pedal and shift into 5th gear. (second clutch)
Let go of clutch pedal and apply throttle.

Notice how there are two applications of the clutch pedal? Hence the term double clutching.

Try it sometime - I bet you'll like it

[CalRick]

Originally Posted by iranmeba

does shifting without your clutch actually work?

Sure - I used to do it all the time in my Dad's VW that I learned to drive on. It's very handy to know for when the clutch cable breaks (or the clutch cylinder leaks and loses all its fluid.) It also helps you learn to anticipate traffic to avoid stopping! Some gearboxes/shifters are more amenable to it than others though.

[denial512]

Wow, people thinking double clutching is unnecessary.. I can think of two cases:

1) coming to a turn, which you want to be in 1st, but you are locked out due to road speed. Definitely need to DCHT

2) if you synchros are shot or not working to well, you may need to do this just to shift into that gear without significant grind.

[KevinC]

Originally Posted by denial512

2) if your synchros are shot or not working to well, you may need to do this just to shift into that gear without significant grind.

My first car, a '69 Beetle, had 96k on it when I bought it and the 2nd gear syncro was toast. A buddy taught me how to double-clutch, and voila, problem solved.

O-Cha, cool your damn jets. Nobody is a "tool" for doing this - double-clutching prevents wear on the syncros. If you downshift without doing it, or only blip the throttle, you are gradually wearing out your syncros. A properly timed double-clutch maneuver completely saves the syncro from any wear at all.

[pbdm4k]

Perhaps some of you are confusing rev matching with double clutching.
Double clutch is only needed in a down shift from 2nd to 1st as there is no synchro between these two gears.

Originally Posted by scottyD

O-cha, good point with where the wear is occuring - there is probably some with the clutch as you said, but I think there is still some at the syncros as well.

I think you need a clarification.

For example:

In 6th gear, and I want to downshift to 5th.
Take foot off gas pedal and depress clutch pedal. (first clutch)
Shift to neutral and let go of clutch pedal.
Blip the gas pedal to give the engine and transmission some more revs.
Depress clutch pedal and shift into 5th gear. (second clutch)
Let go of clutch pedal and apply throttle.

Notice how there are two applications of the clutch pedal? Hence the term double clutching.

Try it sometime - I bet you'll like it

You just wasted 3 seconds depressing the clutch and stepping on it again for no reason. You have synchros for a reason. Try it on the race track and see how much slower your lap times are lap for lap.

Heel-Toe is your friend.