double clutching doesn't allow you to skip gears and it's not something you should be doing anyway. You should be downshifting 6-5-4-3. When do you actually do this on a track? This is racing and competition right? Since we've concluded this is not something that you need to do, should do or would want to do in competition or on a track why are we still talking about it?

Maybe this should be in Street Encounters?

 

so you don't think the 2nd gear synchro is going to get damaged if you just push it into gear from 6th? Or going to redline in 2nd and just pushing the gear into 6th? I haven't competitively tracked the car, so i don't know about slower lap times. I'm just basing my differing opinion on the conceptual idea of how a transmission works and what the synchros have to do to compensate for the difference in rpm of the output shaft to rpm of the engine! I know this is the race forum and the point is to decrease laptimes, not increase the life of the synchros, so i'll respect the other side of the coin!

 

When i start tracking my car in the spring, i'll have to experience all of this for myself, first hand! Until then, i'll post up my 5 fast 5 furious esque double clutching experiences on Street Encounters!

 

Can someone explain to me what they feel the dangers of double-clutching are? From the passion in these arguments you'd think it was going to break something!

If the OP wants to learn this piece of 'quaint history', why not let him? ABS brakes almost negate the need to learn to threshold brake, yet we still advocate learning that!*

* Yes, I'm exagerating.

[QUOTE]While decelerating?

 

Captain_Pants, I agree with you on all points of your last post (and I'm or used to be a racer ).
Unlike slow upshifting, slow downshifting shouldn't impact laptimes, and double clutching isn't really slower as you pointed out.
I should practice more though my F2000 doesn't need a clutch once rolling.

 

racing is hard on parts..... i haved raced 3 years in an S2000. anyone racing should be out there to win..... not out there to save your equipment..... I am pretty sure laptimes suffer a fair amount with double clutching.....

so anyway... if you want to double clutch, shift at 4000, start breaking mid straight, that is up to you..... you posted in the racing section and we are telling you that you don't get around the track the fast way by double clutching....

why the hell would anyone on a race track go from 2nd gear to 6th? strange... optimal gas mileage?

 

[QUOTE]why the hell would anyone on a race track go from 2nd gear to 6th?

 

Aha! I found the video I was looking for - Gary Sheehan racing a WRX in the 2003 USTCC at Infineon Raceway:
http://www.teamsmr.com/movies/Footbox%20Small.wmv

Do you honestly think he lost any time by double-clutching?

 

Can't argue with Gary Sheehan.

 

There is nothing wrong with it. There is nothing right with it either. It's totally unnecessary which means it's just one more thing to do at a very busy time and one more thing to screw up. There is no track situation which requires you drop 3 gears and you never want to find yourself in neutral at any time on the track. If you are coming into a hairpin like say Turn 11 at sears then you will be in 4th. You'll downshift to 3rd and then downshift to 2nd as two separate shifts. If you are dropping 2 or 3 gears then you are burning off a lot of speed and that gives you plenty of time to downshift through each gear. Dropping into neutral and coasting while your brakes bleed off speed so you can later put it in a much lower gear is really bad form.

You must always be in gear unless you're changing them and that takes less than a second.

Double pumping the clutch may be an old habit rather than a conscious decision. If that's the way you learned to do it way back in the day that's fine but it doesn't mean you have to learn to do it like that now. It does no harm if you already have the motor memory to do it. So, if you want to double clutch/double pump through 6-5-4-3 then fine, more power to ya, but you should never be shifting 6-3, ever.