Double clutching.

Ok so double clutching is when your shifting but you keep your gas pressed down and your RPMS go way up when you shift in to the next gear. I know that messes up your car. People say that if you have a sports clutch its ok to double clutch it wont really mess it up is that true? And if you double clutch with a stock clutch how badly will it actually mess things up cause i have done it a few times so i dont know.

What is double clutching? - dsm97gsx
Basically it is a driving technique that saves the life of your tranny and synchros. The goal is rather then simply downshifting, you take it out of gear, rev the rpms up to get the engine spinning to the correct speed, and then put it into gear. This saves the life of your transmission synchros and eliminates that lurching you get when you downshift. For a detailed explanation check out this web site: http://www.driversedge.com/dblcltch.htm

READ THE THREAD AT THE TOP OF THE PAGE!

The way that the link above explains it is how I always understood double-clutching. What coolguycooz explained is called speed shifting and yes it is bad for the clutch. Now the only thing I don't understand about double-clutching is why you must do it twice (that intermediate step where they tell you to put it in neutral briefly and put the clutch in then take it back out) because all I do is rev match without putting it in neutral, it's all one quick motion from a higher gear to a lower gear. I just blip the gas as I'm downshifting and I think this is what most people do. I makes for a smooth downshift without lurching.

So what's the advantage of putting it in neutral then letting the clutch in and out, then putting the clutch in and out again when going into gear? Just seems like an extra step that doesn't need to be there.

I think you have to do that extra step so the syncros get to that rpm also, otherwise if you don't do that you are just reving the car and not helping the syncros. All you are doing is rev matching which is what I do.

Okay well you guys wont be needing it unless your driving an 18 wheeler....i think the tranny will last the life of your car as long as you dont downshift too much, launch at every stop sign and stop light, etc.....you should be fine.

i think the tranny will last the life of your car as long as you dont downshift too much, launch at every stop sign and stop light, etc.....you should be fine.Well, I'm screwed. :rofl:

Good expl. 97 3clipse -

Got it... No one has ever been able to explain it correctly.

Its amazing how many people started using the term double clutching when fast and the furious came out... Or was that just me?

There is another thread with the same subject....search

Non-ricers who shift without lifting (NLTS) are using their soft rev limiter, aka stutterbox so they dont skyrocket RPM's while shifting. Anyone who does 'speed shifting' sounds to me like a Honda driver who is wearing out their tranny AND clutch, just to spin the tires between shifts. Quote from 95 GSXracer once said something like: "speed shifting is OK, as long as you can make use of the traction". He meant, if you just spin the tires at the beginning of each gear you aren't doing much.

I expect if you are making any FWD power, 'speed shifting' the first few gears will just be giving away your traction on a silver platter.

I thought double clutching was left back in the day with the three on tha trees and sincroless trannies.
I dont know if I would ever take the time to double cluch, especially in race conditions where it would help the most.
I do however rev up the motor before dropping the clutch to eliminate lurching. Heel toe is so automatic for me I use it every time I brake and shift.