Notices
RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.
Sponsored by:
Sponsored by: CARiD

what is double clutch

Thread Tools
 
Rate Thread
 
Old Oct 28, 2009 | 08:39 PM
  #1  
RemiNessin's Avatar
Thread Starter
Registered User
 
Joined: Oct 2009
Posts: 6
Likes: 0
From: Queens Newyork
Question what is double clutch

Hey everyone I got a question what is double clutch and what is the point of it does it give you a extra boost. And will it mess up the clutch if u do it alot
Reply
Old Oct 28, 2009 | 08:48 PM
  #2  
expo1's Avatar
He's as bad as Can
 
Joined: Feb 2004
Posts: 4,309
Likes: 3
From: Manchester, NJ
http://en.wikipedia.org/wiki/Double_clutching
Reply
Old Oct 28, 2009 | 08:48 PM
  #3  
Juice's Avatar
I made some poos
iTrader: (1)
 
Joined: Sep 2005
Posts: 841
Likes: 0
From: Pittsburgh, PA
This could be good.
Reply
Old Oct 28, 2009 | 08:49 PM
  #4  
ken-x8's Avatar
Registered
 
Joined: Aug 2006
Posts: 5,027
Likes: 5
From: Northern Virginia
It does not give any kind of boost. It makes life easier on the transmission.

You step on the clutch, shift into neutral, lift your foot off the clutch, step on it again, put the transmission into the next gear, then take your foot off the clutch. If you're shifting down, you step on the gas during the neutral foot-off part, to rev match.

Rather pointless on most cars to double clutch when upshifting - better to just granny shift - but it's beneficial on some heavy trucks and other big iron. Double clutching and rev matching downshifts is almost always beneficial.

If you google "double clutching" you should find lots of sites that describe it, and maybe some videos. If you're technical minded, see if your library has a copy of Taruffi's "The Technique of Motor Racing." That has a really excellent description.

Ignore anyone who tells you that synchromesh makes double clutching on downshifts irrelevant.

Ken
Reply
Old Oct 28, 2009 | 09:11 PM
  #5  
shazy's Avatar
Registered
 
Joined: Oct 2008
Posts: 2,256
Likes: 0
From: Montreal,QC
/\ listen To Ken
It's fun though, makes the car sound nice if you have a nice exhaust.
Reply
Old Oct 28, 2009 | 09:50 PM
  #6  
rodjonathan's Avatar
silent assasin
iTrader: (6)
 
Joined: May 2008
Posts: 3,398
Likes: 1
From: Houston
ken said it perfectly i thought he was talking about the dsg or sth lol
Reply
Old Oct 28, 2009 | 09:52 PM
  #7  
Spinning Sushi's Avatar
I <3 Sushi
iTrader: (21)
 
Joined: Aug 2006
Posts: 3,967
Likes: 4
From: SoCal
Double clutching is used in really old cars with no synchromesh in it and is almost pointless in today's cars.
Reply
Old Oct 28, 2009 | 10:13 PM
  #8  
alz0rz's Avatar
hakuna matata!
iTrader: (41)
 
Joined: Aug 2007
Posts: 6,002
Likes: 3
From: NYC
Originally Posted by Renesis SE3P
Double clutching is used in really old cars with no synchromesh in it and is almost pointless in today's cars.
lol
Reply
Old Oct 29, 2009 | 03:25 PM
  #9  
hush...'s Avatar
Registered User
 
Joined: Nov 2008
Posts: 15
Likes: 0
From: Penn
'granny shifting, not double clutching like you should'

listen to dominic toretto man, you GOTS to double clutch it.


jk. but it was funny when you asked if it gave you an extra boost

it's one of those things, I feel, where it's not much of a difference when upshifting as said before. but downshifting, like coming up to a stop or a light, it's nice to use especially if you're running any sound mods, ie intake, exhaust, pipes. sounds pretty as stated before.
Reply
Old Oct 29, 2009 | 04:22 PM
  #10  
pcs's Avatar
pcs
Registered
iTrader: (2)
 
Joined: Aug 2003
Posts: 445
Likes: 2
From: Los Angeles
why double clutch instead of just holding the clutch in and blipping the throttle to rev match?

when i'm at the track and downshifting, I don't double clutch, I just heel/toe and get it in gear... doubleclutching would take too long, i would think...
Reply
Old Oct 29, 2009 | 04:27 PM
  #11  
xun4gvn4everx's Avatar
True love is blue x2
iTrader: (2)
 
Joined: Dec 2008
Posts: 2,801
Likes: 1
From: Future
Originally Posted by Renesis SE3P
Double clutching is used in really old cars with no synchromesh in it and is almost pointless in today's cars.
Reply
Old Oct 29, 2009 | 04:57 PM
  #12  
tmak26b's Avatar
Registered User
 
Joined: Oct 2004
Posts: 1,141
Likes: 0
Something only Vin Diesel can do?
Reply
Old Oct 29, 2009 | 05:24 PM
  #13  
mikesol's Avatar
gas kilometerage
 
Joined: Sep 2007
Posts: 203
Likes: 0
From: vancouver bc
Originally Posted by pcs
why double clutch instead of just holding the clutch in and blipping the throttle to rev match?

when i'm at the track and downshifting, I don't double clutch, I just heel/toe and get it in gear... doubleclutching would take too long, i would think...
Seconding this question. When the hell would I have enough time to double clutch, and how is it much better than just regular downshift revmatching?

I know that it will spin the intermediate shaft in the transmission up, but is that really all that necessary? Shifting the transmission into the lower gear (while the clutch pedal is in) causes that intermediate shaft to spin up to the speed the wheels need it to be at, does it not?
Reply
Old Oct 29, 2009 | 05:38 PM
  #14  
Marklar's Avatar
Registered
 
Joined: Aug 2008
Posts: 935
Likes: 3
Originally Posted by mikesol
Seconding this question. When the hell would I have enough time to double clutch, and how is it much better than just regular downshift revmatching?

I know that it will spin the intermediate shaft in the transmission up, but is that really all that necessary? Shifting the transmission into the lower gear (while the clutch pedal is in) causes that intermediate shaft to spin up to the speed the wheels need it to be at, does it not?
It doesn't take long once you've practiced it enough, it can be done very quickly, it only adds a fraction of a second to the shift. It allows you to manually do the job of the synchros, which can save wear on the tranny. It's not absolutely necessary, but for large downshifts (two or three gears down) I always double-clutch it, aside from being nice to the transmission it also makes for a buttery-smooth downshift and it's actually easier than single-clutch rev matching IMHO.
Reply
Old Oct 29, 2009 | 06:05 PM
  #15  
Uncivilizedracer's Avatar
Turbo SR20deT Son!
 
Joined: Jun 2007
Posts: 790
Likes: 0
From: North. dallas(Texas)
Just watch fast and the furious 1 and you will get all the info you need.
Reply
Old Oct 29, 2009 | 06:23 PM
  #16  
Kevo's Avatar
3.2 Liter Inline Sex
 
Joined: Mar 2004
Posts: 635
Likes: 1
From: South Texas
Originally Posted by RemiNessin
Hey everyone I got a question what is double clutch and what is the point of it does it give you a extra boost. And will it mess up the clutch if u do it alot
Hmmm...double clutch? Let me take a stab at this one...double clutch = useless, pointless, ridiculous, insane, retarded, silly and totally uneccessary.

I think that about sums it up.
Reply
Old Oct 29, 2009 | 06:29 PM
  #17  
Kevo's Avatar
3.2 Liter Inline Sex
 
Joined: Mar 2004
Posts: 635
Likes: 1
From: South Texas
Originally Posted by pcs
why double clutch instead of just holding the clutch in and blipping the throttle to rev match?

when i'm at the track and downshifting, I don't double clutch, I just heel/toe and get it in gear... doubleclutching would take too long, i would think...
Right on...NO ONE at the track double clutches...anybody who knows how to properly rev-match and heel-toe downshift has ABSOLUTELY no need for double clutching.

Unless of course you have a secret desire to become acquainted with an occassional wall or barrier because you missed your brake/ shift zone while you were busy futzing around in the footwell with a double clutch.
Reply
Old Oct 29, 2009 | 06:32 PM
  #18  
epikeddie's Avatar
Registered User
 
Joined: May 2009
Posts: 448
Likes: 0
From: Socal
If you ever get a chance to drive a dog box transmission with straigh-cut gears, you'll know what double-clutching is

Again, as many have already stated, it's completely useless for upshifts on our modern sychromesh transmissions.

I think the first time I drove a racing transmission with no sychros I had thought that I broke the transmission with my mighty shifts lol. Then the guy next to me says, "Hey, that's not bad - most guys can't even get that sucker in gear."
Reply
Old Oct 29, 2009 | 06:37 PM
  #19  
laythor's Avatar
I zoom therefore I am.
 
Joined: Mar 2007
Posts: 4,919
Likes: 12
From: San Jose, CA
http://www.teamsmr.com/movies/Footbox%20Small.wmv
Reply
Old Oct 29, 2009 | 06:47 PM
  #20  
Grungepup's Avatar
Oilfield trash
iTrader: (2)
 
Joined: Feb 2008
Posts: 2,509
Likes: 0
heel toe? whats that?
Reply
Old Oct 29, 2009 | 06:50 PM
  #21  
Kevo's Avatar
3.2 Liter Inline Sex
 
Joined: Mar 2004
Posts: 635
Likes: 1
From: South Texas
Here is another heel-toe clinic for ya...

http://www.4shared.com/file/14473800...oe_Clinic.html
Reply
Old Oct 29, 2009 | 06:56 PM
  #22  
Grungepup's Avatar
Oilfield trash
iTrader: (2)
 
Joined: Feb 2008
Posts: 2,509
Likes: 0
when did you start racing porche's? lol
Reply
Old Oct 29, 2009 | 07:03 PM
  #23  
Kevo's Avatar
3.2 Liter Inline Sex
 
Joined: Mar 2004
Posts: 635
Likes: 1
From: South Texas
Originally Posted by Grungepup
heel toe? whats that?
Reply
Old Oct 29, 2009 | 07:04 PM
  #24  
SageJMP's Avatar
Registered
 
Joined: Sep 2007
Posts: 36
Likes: 0
about the only time it is really really needed is to get back to first. First is the hardest gear to get back into if you are at 20+ mph.
Reply
Old Oct 29, 2009 | 07:14 PM
  #25  
Grungepup's Avatar
Oilfield trash
iTrader: (2)
 
Joined: Feb 2008
Posts: 2,509
Likes: 0
Originally Posted by Kevo
why you gotta laugh at me
Reply


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 05:39 PM.