petee_c

I've been driving standard vehicles since 1995. I never got formal training on it.... My buddy in University let me learn a bit on his Nissan Frontier truck.

Do you double clutch? I never really did before, except for getting into 1st after coming to a stop sign...

then I watched this video as it came up on my YouTube feed....

Interesting... I started practicing a few weeks ago, and find myself double clutching more than not... Don't think I'll get my footwork to be fast enough for the track, I've got a ton of other things to work on if I ever go back to the track...

Watcha think? How do you shift?

993GT

yes (+ heal-toe when slowing) every downshift, just is habit
saves gearboxes and easy on timing chains/belts/bits

reacp911

double clutching the upshift? what a waste of time. You don't even need the clutch to up and downshift.

double clutching sounded great in bullitt, but apparently that sound was dubbed from a nascar stock car

993GT

99% of cars only for downshift
don't need the clutch but either you're effectively doing the same rev match, or just mashing synchros/dogs

#1SomeGuy

Pretty pointless on modern synchronized transmissions....it's "cool" but not necessary at all. Odds are you'll just shift the wear around to other components (e.g. throw out bearing, clutch linkages, etc.).

Lemikson

Only if you are into driving an Magirus Deutz truck...

Brian 162

No on the double clutch, I sometimes heel and toe .
I used to drive a 5 ton truck at work that had a 4 speed. I only used the clutch for reverse or from a standing start. All other up or downshifts were without using the clutch. It only took a day or two to get good at it.

993GT

^yup no clutch except for starts on 'rigs...fun to drive occasionally

993GT

somewhat true, it's the difference between 200km and a million k...
I'm in the business, if you guys want to burn through more parts its all good... lol

#1SomeGuy

The transmission is going to need a rebuild and a few clutches to make it to a million miles anyway. I doubt there's any evidence out there proving that double clutching lowers cost of ownership.

993GT

Copans and Rader are very approachable guys if anyone wants to talk Porsche trans with the experts

petee_c

So.... should I continue to practice double clutching? or only on the downshifts while braking? or stick to the 'single' clutch.....

993GT

well double clutching means the synchros/dogs are experience little to no work/wear, not to say the gearbox will destruct if you don't...but less wear is less wear...

reacp911

Do what feels/sounds good to you

On downshifting, if you don't double clutch, and blip the throttle while in neutral, the synchro/blocker ring must raise the speed of the input shaft to the matching output shaft speed. On upshifting the speed of the input shaft naturally falls through the matching speed.

Imo000

I don't use the clutch when talking it out of gear during slowdown. There is a way to do this without causing any wear to any of the parts. Have been doing this for 15 years but not because I want to save the transmission but to save the release bearing. I use the brakes to slow the car while the transmission is in neutral, not the clutch. Rev matching during declaration makes the clutch do the job of the brake pad. Much easier to replace the pads so let them do that work.