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View Full Version : How do you Double Clutch


dogstar672
01-27-2002, 11:14 PM
How do you double clutch? And to do it do you need a performance clutch or can you use stock?

WhiteS13
01-27-2002, 11:34 PM
Double de-clutching is used to help engage into gears that have weak or no synchros (dogtooth gears).  There's absolutely no performance benefit from double clutching because it takes longer to do.

1) Clutch down
2) Shift out of gear into neutral, and release clutch
3) Clutch down
4) Shift into gear, rev-match, and release clutch

I double de-clutch in the cold mornings when shifting into 3rd gear. &nbsp;Helps minimize the grind. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>
Guess that quote from F&amp;F really got to a lot of people.

BadMoJo
01-27-2002, 11:50 PM
yeah, #### F&amp;F for that quote.

DSC
01-28-2002, 12:07 AM
I think this is the 30th time I've posted this link because of that awful and inacurate movie, F&amp;F. <a href="http://www.turnfast.com/tech_driving/driving_heeltoe.lasso" target='_blank'>http://www.turnfast.com/tech_driving/driving_heeltoe.lasso</a> there is a paragraph on double clutching at the bottom. Its basically what whites13 already said, but a bit more detail.

BadMoJo
01-28-2002, 12:09 AM
hey DSC, i remember your sig. &quot;F&amp;F, almost as gay as liking men&quot; &nbsp; LoL that was great stuff. &nbsp;:biggrin:

DSC
01-28-2002, 12:41 AM
<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> heh, yeah
Its back

(Edited by DSC at 12:43 am on Jan. 28, 2002)

sspikey
01-28-2002, 05:02 AM
i love how its all the name brands in there
you can have any beer as long as its a CORONA
motech exhaust <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=':D'>
NOS (used a good 50 times)
and so much other stuff which im too tired to think about at 7am

silk
01-28-2002, 09:26 AM
actually, i find that when downshifting, double clutching helps..reduces the stress on the clutch if the revs are matched before you drop down.

DSC
01-28-2002, 10:32 AM
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from silk on 9:26 am on Jan. 28, 2002
actually, i find that when downshifting, double clutching helps..reduces the stress on the clutch if the revs are matched before you drop down.</td></tr></table><span id='postcolor'>How would double clutching be better than just heal-toe downshifting?

anthony240
01-28-2002, 10:41 AM
from what I've read, they're pretty much the same, double clutching is just that, pressing the clutch two times, one for going into neutral and another for going to the lower gear. in heel-toe, you press the clutch and downshift, and you don't release until you shift into the lower gear.

I never really got his &quot;double-clutching like you should&quot;, cause you shouldn't, not in drag racing anyway. you double clutch in drag racing and end up doubling your time. if anything he should've said power shifting or getting a good launch.

and don't forget the tire brand, what was it again? Sumimoto ZX? God I hope they don't make a part 2, well if they do they can stick to Domestic cars.

'91 D21 beater
01-28-2002, 11:08 AM
Heel&amp;Toe has absolutely nothing to do with double clutching... well, it does, but not one and the same

...Heel&amp;toeing refers to when you have to be on the brakes coming into a corner, you clutch in, change gear (or double clutch if you want), then you roll the heel of your foot over while the toes or more like the ball of the foot is still on the brake and blip the throttle, to better match the engine speed to vehicle speed/tranny speed...

Double clutching is like what it's explained above. It's just a way to get the inputshaft of the tranny matched to the engine speed to help gear engagement.

Rally drivers on the other hand doesn't even touch the clutch pedal... but they do heel&amp;toe to rotate the car in turns

(Edited by '91 D21 beater at 11:25 am on Jan. 28, 2002)

MyFirst240SX
01-28-2002, 03:00 PM
Man from what ive heard around here Double clutching is when you press in the clutch when you are going and give it gas so your RPMs shoot up higher then reengage the clutch. &nbsp;My freind in his eclispe RS beat my freinds 92 S10 Vortech doing that. &nbsp;

chickenmanq
01-28-2002, 04:38 PM
Ok, sorry, but no. &nbsp;pushing in the clutch and revving the engine and reengaging will only do one thing: Wear out your clutch. &nbsp;And as far as 92 S10's, with the V6 or not, an Eclipse should NEVER have a problem beating that. &nbsp;I beat those constantly in my truck. &nbsp;The V6 is a good engine, but the way the rest of the truck is designed sucks, and they're still too slow for the kind of hp they can generate.

01-28-2002, 05:13 PM
I believe your definition of double clutching is wrong WhiteS13. Please don't take this personally and let me know if you disagree or what I say doesn't make sense.
1) Clutch down
2) Shift out of gear into neutral, and release clutch
3) Clutch down
4) Shift into gear, rev-match, and release clutch
The way it's said here is the way a car would be driven by a normal joe, nothing happens between putting the car into neutral and putting into gear. Maybe you mistyped the steps, but it should go like this.
1) Clutch down
2) Shift out of gear into neutral, and release clutch
3) rev-match, Clutch down
4) Shift into gear and release clutch
That way you actually match the input shaft with the drivetrain, even with a synchroed gearbox, if you get them matched it's amazing how easy it slides in when they are matched.

spd racer05
01-29-2002, 01:34 AM
I find double clutching does not take longer than a single blip of the throttle because you should only be double clutching when you are braking to enter a turn. It does not wear the clutch or the drive train. In fact it acutally helps save the drivetrain. The object is to match the input shaft speed of the trans to the speed of the motor. It helps to mesh everything smoothly, as well as prevent disrupting weight shift as you enter a turn. In fact many race drivers use this in road racing. The is no need to use this in drag racing. drag racing you would just power shift the gears.... I hope this helps!

HippoSleek
01-29-2002, 06:54 AM
ENOUGH! &nbsp;No more F&amp;F for any of you... match your friggin revs and call it a done deal. &nbsp;If you want to burn your clutch just to claim your title as nUmBa 0nE sTunnA, be my guest.

idunit
01-29-2002, 08:02 AM
I have only used the double clutch technique ONE TIME! &nbsp;It was when driving my friends 66' ford pickup with a three on the tree. &nbsp;Try speed shifting that bad boy. &nbsp;Although we did make a short shifter for it. &nbsp;haha. &nbsp;Anyway, if you didn't double clutch when you stopped it wouldn't go into to first gear, it would just grind really loud and generally make you look stupid. &nbsp;Same thing with reverse.

DSC
01-29-2002, 11:31 AM
Why the fuck doesn't anybody ever follow links. TURN FAST DOT COM ARTICLE ON HEAL-TOE DOWNSHIFTING WITH A PARAGRAPH ABOUT DOUBLE CLUTCHING AT THE END (http://www.turnfast.com/tech_driving/driving_heeltoe.lasso)

AJ
01-29-2002, 12:23 PM
because people like to run thier mouths off for no reason... what can i say...

they do it with the best of intentions <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

s14guy
01-29-2002, 07:14 PM
I don't know too much about it , but I think the double clutch the loser in f+f is reffering to would be when you launch . 4000 rpm launch on a turbo car would put you in the lag zone when the clutch is fully engaged . I f you let the clutch 1/2 way out , at your launch (just to get 10-15 mph momentum, then depress pedal , raise to redline and dump you would avoid the lag and have a better 60' time . I've seen it done and it is quite effective . (on Turbo Cars!!!!)

S13Grl
01-30-2002, 09:40 AM
I'm agreeing with S14Guy not because he's my boyfriend, but because he's actually right about this one.