hey,
i know the basic concept of this, i think?
go up in the gear, clutch in, shifter to neutral,clutch out,rev it up, clutch in, drop in next gear, clutch out.... or thats the way i read it. is that right?
whats the deal with that? why does it help you out? is it the same as just revving high in neutral between shifts (or powershifting)?
thanks

 

only useful if your driving a 18 wheeler Tractor Trailer,waste of time.

 

unless ure taking turns double clutching is useless....wait were u watching f&f.ahhh nm im not even goina go there

 

In racing it saves wear on your tranny. That's it. Your shift times will be about twice as long - not practical for drag racing. (Fast and Furious = ) Most experienced drivers only do this in endurance races where tranny durability is a key factor. I guess you could do it on the street in traffic or whatever to save wear on your synchros if they're starting to go bad.

edit: hammer: ) not hammer


[Modified by pub, 1:59 PM 7/27/2002]

 

thanks for the response cookiemonster with mouth intercooler..., no thanks for the f&f comments, lol

 

Only way you can double clutch is if you have a motec exhaust and a spoon engine w/ t66 turbo

 

you must be an amateur! you forgot the 2 10lb bottle of NOS in trunk!!!

hahah shady fast and the furious

 

Are you trying to double clutch while up shifting????? I'm afraid I would have to agree with the F&F statement.

Double clutching is a down shifting technique my friend. Same steps you described, only shifting down, not up.

For those of you who said it's a waste of time, I would have to disagree with you. Ever try dropping a gear w/o double clutching? You get that nice loud thump and your car feels like its going to break if you keep it up? A nice double clutch while dropping gears will remedy that problem and your tranny (synchros) will thank you for it.

 

you can double clutch on an upshift too. Unlike downshifting there is no performance advantage only reliability advantage.

 

The only time I would double clutching on an upshift is if the RPMs dropped too much. But I guess you're right, it is still a double clutch technique.

 

so that's called "double clutching"? i thought it was "rev-matching" or are they same thing? i do it (whatever its called) because when i shift my car, it tends to jerk alot so i do it to get a smooth transition to the next higher/lower gear. i always thought rev-matching was for the smooth transitions and double clutch was just pushing down the clutch while your foot's on the gas for a split second to get that extra "kick" when your engine kinda lags at take off.

 

rev matching doesnt have the step where you rev the engine with the clutch engaged and in neutral.

 

i don't get it. isn't it still the same thing because you're revving while the gears are disengaged?

 

Double clutching involves rev-matching. By your description, they are one in the same. Don't worry, you're doing the right thing.

 

rev matching is different, since you don't disengage the clutch. double clutching involes 18 speed trannys and mullets! oh and the f&f

 

i prefer granny shifting in traffic

 

i wouldn't double clutch...u will blow the welds on ur intake manifold, and then you will have to tear down the block and replace the piston rings you fried!


mike

 

I "double clutch" so I don't grind my 5th gear (which would happen every time if I didn't). But I don't hit the gas before I disengage the clutch again, so maybe I'm rev matching. whatever, it stops my grind completely.

 

What steps do you take to do this without using the gas?

I'm guessing you:

1) Clutch in shift to neutral (currently in 4th)
2) Release clutch
3) Clutch In, shift to 5th
4) Release clutch

???

 

youre pretty much right

for a 4-5 upshift:

1-clutch in, shift from 4 to neutral
2-clutch out, let motor coast down to proper RPM for 5th gear
3-clutch in, shift to 5
4 clutch out
5-enjoy your double clutching skillz

the key step, just like in double clutch downshifting, is step 2 with the RPM match.

 

Why not

1- clutch in, shift from 4 to neutral
2- let motor coast down to proper RPM for 5th gear
3- shift to 5
4- clutch out

????

Is there really a need to let the clutch out then put it back in?

 

thats what i was wondering

 

 

yes, to match the input shaft speed to the engine speed.

 

double clutching comes from older trucks and Semi Diesel trucks.

Modern cars/trucks don't need to do this because we have synchro's in our trannies with mesh the gear fork into the actual gear. When a synchro goes out, you have to press in the clutch and put it in to neutral then release clutch to neutralize all the gear forks and put it out of gear, then push in the clutch again to engage the new gear

other than that, pointless, don't watch F&F