Sassafrass

Can anyone explain to me if this is essential? Or even how to do it.

Thanks
Greg

imported_JookSingKid

From my understanding, double clutching was pretty critical back in the day before synchro rings, so in a word, no its not essential, BUT if you have any gears that grind when you try and shift into them, you can double clutch and that will help you match the timing of your engine to your tranny and you can shift into gear without grinding.

SiR-Racer

double clutching is used when you want to downshift. simply shift to neutral, release the clutch and blip the throttle to match revs for the gear you are shifting into. then press the clutch and shift into that gear.

it makes downshifting much smoother and quicker.

imported_Stock Si

Is that really it! So why in the movie (i know movie is not always true) does it say that, cause there was no downshifting at all??? I just don't get it!

SiR-Racer

You mean in The Fast and the Furious? Yes, that line when Vin Diesel says "you lost because you didnt double clutch" is total bs. no one double clutches during a drag race. that's why people laughed in the theatre when that line was said

imported_Stock Si

Ah i see, wow, i have been doing this the whole time!..and i didn't even know it!...

imported_Shaun

rofl double clutching....
not needed for today. u dont have to release the clutch when u hit neutral...just stay on the clutch and blip the throttle as ur downshifting. that will match the revs.

SiR-Racer

actually no.

if you stay on the clutch you arent actually matching the revs with the layshaft and you arent saving work on your synchros.

here's an explanation:

http://integra.vtec.net/driving/dclutch.html

scroll down a bit and you'll come to this paragraph:

"Can you rev-match the layshaft to the transmission gears by throttle - blipping with regular single clutching? No. The layshaft is not connected to the engine while the clutch is in. Those that recommend throttle-blipping rev-matching are right that it gives a smooth transition when they let the clutch out, but it does absolutely nothing to match the layshaft and does not save your synchros any work at all. "

Is double clutching essential? No, but it does save work from your synchros and makes the shift smoother. That's why I do it all the time.

hope this helps.

imported_fine2ne

i was pretty sure that double cluthing was for 18 wheelers use clutch 1 to take out of gear use clutch again to put into gear

SiR-Racer

trucks use it because they dont have synchros

imported_v33k

I used to drive trucks without synchro, double-clutching is an option, not necessary. Just blip the throttle will do. When you drive one all day and you have to shift like few hundred times. You will know what I mean, double-clutching just double your work. Ask the truckers around. Most of them don't double-clutch when they drive a company truck. Unless that truck is in very bad shape must need double-clutching.

As for the civic, new gearbox design is not necessary to double clutch. It maybe better for the gear box, but it is definitely not necessary when you drive normally.

imported_dented dx

ask rich to show you some double cluching, i thought his foot was going through the floor! way to go rich, ya see you are my hero!

imported_Shaun

gah just do some rev matching. saves wear on ur clutch....if ur syncros go...just get a used tranny! zc tranny plus si final drive *drool*

krAzyMonk

ok so what do you call it when people hit their clutch twice most often when they are racing ....makes the rpm jump and seems as if your going a little faster

imported_Shaun

pushing the clutch twice doesnt make that rpm jump...pressing the gas for a brief period of time while ur on the clutch does<---but that is not double clutching. that's just rev matching for downshifting. i personally dont see why double clutching is necessary for today's gearboxes.

imported_94EG6HB

I happen to like the gear grinding noise....

SiR-Racer

that's why everyone said it's NOT necessary. but it DOES save your synchros. so if you want your synchros to last longer, then double clutch. eitherwise dont.

Import Racer

but double clutching does help you downshift smoother, that's only if you blip the throttle to the exact RPM that you'll be downshifting to. Kinda like heel and toe....correct? Except heel and toe you add in the brake. Correct?

SiR-Racer

yup, heel and toe is the same as double clutching except you add the brake.

illmatic_si

yah I've done this a couple of times to get a little jump after shifting or to scare j-walkers off the road (hehe). I have no idea what its called..

I rarely do it however cause it will inevitably FRY my clutch!!!