Double Clutching?

[VzVzVz]

I recently started double clutching on both upchanges and downchanges. The result is a better gear mesh when a gear is engaged. Just wondering does anyone else double clutch when diving normally? Or is it just a waste of time? Also, is it any better on the syncros seeing as they dont need to change speed when a gear is solotted in?

[old mate]

ahh dont double clutch a synchro gearbox. it is not good for them. we've had to rebuild many gearboxes in our trucks due to drivers double clutching a synchro box.

[Jesterarts]

I heal/toe sometimes of down shifts sometimes on downshifts to avoid a compression lockup, and if I'm feeling lazy or wearing my boots I just the throttle a quick nudge coming off the brake to bring the rpm up... but in normal driving I can't imagine there is much benefit to double clutching in terms of wear and strain on mechanics. Might even be bad for it since the clutch has to work twice...

Abit of fun I guess is the main gain, you get to enjoy your drive a little bit more if it floats your boat.

[old mate]

ps. are you doing the double clutch correct? or just messing about.

[VzVzVz]

I'm pushing the clutch in when I disengage a gear, let the clutch out when the revs have dropped down to the speed of the counter shaft, push the clutch in once more to engage the next gear (which just slides in without any pressure), then let the clutch out as I normally would.

I can't be bothered typing how I double clutch downshift, there's a bit involved.

[soop]

lol, Its a total waste of time. They designed a syncro box in the 30's so you don't have to do this.

[minux]

Only time i have ever double clutched is when doing HR/HC/MC licences. Otherwise it is pointless and not required.

[soop]

Most of the time big trucks have dog box.

[wraith]

The gearbox has synchros for a reason. Stick to granny shifting and not double clutching this ain't the fast and furious.

[Luke52]

Pointless doing it when upshifting.

If I'm on twisty roads or doing a bit of spirited driving, I'll double-clutch and rev-match into corners to keep it smooth and stable, and occasionally do it when driving normally just for the fun of it.

[STEEV888]

The gearbox has synchros for a reason. Stick to granny shifting and not double clutching this ain't the fast and furious.

even fast and the furious fail at it.. if it does anything it slows them down.. but 100% agree

i used to double clutch 2nd on my 4wd as it was stuffed but all other gears that work dont bother

i do however double clutch when changing down a couple of gears (i.e. 4th to 2nd) when i want to put the power down fast.

[old mate]

just heel and toe on every shift.

simple. done.

[Darren_L]

only car I ever double clutched (on downshift only) was the old mans HK Holden, because it had no 1st gear synchro
apart from that, hate to say it, but others have said it's a waste of time. I 'heel & toe' on downshifts if I'm out on a track day or similar - just to prevent the rear wheels from locking, but that's totally different to double clutching.

I always get a chuckle out of that F&F movie when Vin Diesel ridicules the guy for 'granny shifting'... a good driver can flat shift most modern gearboxes, why would you waste precious time double clutching...

[wraith]

I managed to shift without the clutch in my old 33. Mainly because I had no choice. 5k launches aren't easy on the factory clutches.

[axemurderer101]

I tried to do the heel/toe in my vy ss but i can never get my heel to touch the accelerator lol must be some trick to it

[soop]

Nah its a prick. Pedals aren't setup to do it.

[wraith]

Nah its a prick. Pedals aren't setup to do it.

Who would of thought it would be tricky in a family car to heel toe.

[vr1uz-fe]

i couldent heel toe in my old car tried it but failed tried double clutching waste of time i find cluthless shifting the go or just a little tap of the clutch

[GRPABT1]

This thread brings the lols, Double clutching is for old trucks with crash boxes ffs. I heel tow down shift in both my VN and my suzuki sierra daily. It saves clutch wear and compression lock up. If you're going fast you should be able to up shift without the clutch or very little clutch at all, double clutching takes ages comparitively

[tim005]

heel toeing i understand, i do it ever now and then when i am in a fun mood and want to go into a corner that bit quicker.
double clutching i am not sure of, the only time i have any heard anyone say anything about it is on fast and the furious, hence i am a granny shifter haha.
someone care to explain?

[soop]

Who would of thought it would be tricky in a family car to heel toe.

I know, stunning isnt it :P

[GRPABT1]

Heel toeing isn't hard if you're not a complete moron. It takes a bit of practice to get right at first but once you get used to it it's like second nature, just like most facets of driving. Regardless of if it's a family car or not, like I said I do it in my VN and sierra which aren't exactly ergonomically designed as race cars. But even still I find myself doing it to most cars I drive, it's and effort not to really after doing it so often, just like when you go for the clutch or gear stick in an auto car after driving a manual for a while.

Double clutching (if that is in fact what you are actually doing) is/was primarily practised in trucks of yester year with non sincro "crash" gearboxes where revs had to be perfectly matched to change gear. In these trucks changing up was still done without double clutching (unless you missed your window and took too long to change). It is only on down shifting that double clutching was neccessary, to bring the revs up to the next gear then engage it.

So it would go like this * braking, clutch in and dis-engage gear, clutch out, bring revs up to match lower gear at particular speed, clutch in engage gear, clutch out *.

And this was only really used for down shifting as up shifting could be done on the drop of revs as you engaged the clutch and took your foot off the accelerator. Often up changing was done without the clutch at all, which can still be done today in modern cars and is the fastest way to change gear (watch Skaifey or the likes on foot cam in V8 supercars).

So why on bloody Earth did they mention double clutching in f"n"f is beyond me and and just another reason why we laugh hard at that film.


take a look at these films and notice how often they change without the clutch at all but note the accelerator
YouTube - Twin Stick Shifting
YouTube - Twin Stick Pappy