double clutching question??

[vtecattack]

I always hear people talking about double clutching!! What exactly is double clutching and whats the best way to do it?? Thanks.

[JasonAccord98LX]

im sure that you will get a much more technical response from fritz or someone like that, but in simple terms double clutching is pushing the clutch in two times instead of once in between shifts. ex. you start off in first gear,get to where you want to shift, push in the clutch shift to 'N', release the clutch, push the clutch in again, and shift to 2nd. Double clutching is used mainly to help line up the synchronizers inside your gearbox better, which makes for a smoother shift. This method is needed mostly on older trucks and large vehicles.

A pretty simple and basic explaination.....if you wait im sure that the more techical ones will come.

btw, my friend drives firetrucks for the fire department and they hae a really old truck which needs to be quadruple-clutched (push the clutch in 4 times in between shifts) to properly line up the synchros for a good shift.

[Marc-OS]

Double clutching is not really needed on recent cars. The only reason for double clutching in my opinion is when you are downshifting, and even then it's more rev-matching than double clutching.

[vtecattack]

thanks for the info. I didnt think that it sounded beneficial as far as when you are racing...seems like more time and trouble than just clutching once. So there really is no benefit from it as far as quicker 1/4 mile times??

[JasonAccord98LX]

for most normal applications and in your case, yes

[LjasonL]

its more of a technique for rally racing, tractor mud pulls, or hauling big loads than 1/4 mile racing. however in my awd car i do a version of it on launch to keep my rpms up and get a better takeoff, im holding the clutch, drop it on green, then instantly push it back in again and drop it again. i have shaved over 1.5 seconds off my time by refining this method at the local track but i have no idea why anyone would do this through EVERY gear, like they imply on the fast and ferocious. unless of course u were competing in a tractor pull or hauling a big load.

[vtecattack]

thats fast and furious for you!!

[jeisai]

Was the eclipse in F&F a GSX? If it was, it would have been all wheel drive, and they could've been talking about doing the same thing delaysion does with his scooby.

[drift]

Originally posted by jeisai
Was the eclipse in F&F a GSX? If it was, it would have been all wheel drive, and they could've been talking about doing the same thing delaysion does with his scooby.

he said, "granny shifting, not double clutching like ya should"

and if you know english and the definition of all terms used, you'll be able to realise that the term "double clutching" is used incorrectly in that statement, no matter how much you try and twist it around.

[jOYRiDe]

i thought only trucks double clutch do it when they go downhill

[drift]

Originally posted by jOYRiDe
i thought only trucks double clutch do it when they go downhill

that is true, but some race cars still doubleclutch when slowing down for a corner because one: it's a smoother shift without disrupting the drive wheels. dropping the clutch on a downshift can cause the drive wheels to break traction from the tranny trying to speed up to the motor.

two, some race cars still have a dog box... no synchros.


street cars dont have dog boxes, so double clutching a street car is pretty useless, unless you're racing and want to make a proper downshift and transition into a turn

[jOYRiDe]

Originally posted by drift



that is true, but some race cars still doubleclutch when slowing down for a corner because one: it's a smoother shift without disrupting the drive wheels. dropping the clutch on a downshift can cause the drive wheels to break traction from the tranny trying to speed up to the motor.

two, some race cars still have a dog box... no synchros.


street cars dont have dog boxes, so double clutching a street car is pretty useless, unless you're racing and want to make a proper downshift and transition into a turn

hey thanks for that info...
now i understand the concept of doubleclutching....
u americans will probably use dogboxes soon in the 'race' wrx...subaru have pretty weak trannys...

[JasonAccord98LX]

Originally posted by jOYRiDe


hey thanks for that info...
now i understand the concept of doubleclutching....
u americans will probably use dogboxes soon in the 'race' wrx...subaru have pretty weak trannys...

um.. that doesnt make any sense at all. i believe that if your trannys were weak, you would run synchros so when you shifted there would be less wear and tear on the gears and bearings. and i dont believe that subarus have weak trannys.

[jOYRiDe]

Originally posted by JasonAccord98LX


um.. that doesnt make any sense at all. i believe that if your trannys were weak, you would run synchros so when you shifted there would be less wear and tear on the gears and bearings. and i dont believe that subarus have weak trannys.

i do
ive seen them go pop... and its very common from where im from (swapping trannys)

[drift]

Originally posted by JasonAccord98LX


um.. that doesnt make any sense at all. i believe that if your trannys were weak, you would run synchros so when you shifted there would be less wear and tear on the gears and bearings. and i dont believe that subarus have weak trannys.

you should stay abreast in the WRC... scooby trannies go pop a lot.

but the new 2002 WRX should have taken care of that problem... they beefed up the tranny.