I too believe that revmatching and double clutching are not the same.
If you double clutch, and with the clutch out you rev match and press in the clutch, change gears, and let the clutch out, those're two different processes, of revmatching & double clutching.
You can revmatch and not double clutch, simply by letting the synchros do the work.
Hope I'm right on target

 

revmatching keeps the car settled, i.e. engine doesn't surge or stop when you let clutch out. This in turn keeps the car poised the same way - no nose dive or rear tires suddenly locking up. If you're at the limit in a turn and downshift in preparation for the exit, you really should revmatch.

double clutching matches the speed of the idle shaft in your transmission to the output shaft (driveshaft) so your gears mesh together cleanly. if don't properly, you do not need to depress your clutch at all during a "double-clutch" shift.

you don't need to do either technique.

revmatching is recommended when the car is at some kind of limit - cornering, braking. if you don't revmatch, the disruption of you just letting the clutch go can break your tires loose and you might go spinning off the road. in general revmatching will reduce wear on your clutch.

double clutching is not really needed but it's a good way of learning what speed corresponds to what rpm in what gear. I was double clutching a lot this morning in traffic to keep myself entertained. If my clutch failed, I might be able to get home (or to a garage or somewhere) without using my clutch. Twice I've had clutches fail (actually slave cylinders). Once I had to drive a couple hours, including about 20 minutes through relatively heavy New Years Eve traffic in LA, and made it okay. in general double clutching helps you learn your car, reduces wear on transmission, and allows you to smoothly shift a relatively worn transmission. and you can jump in a bus, truck, or any straight cut gear race car and shift it properly.

Are you driving to get from point A to point B? then you don't need either. Are you interested in becoming a more proficient driver? Then learn what both revmatching and double-clutching are and practice both.

Both can be used with heel/toe. If you're interested in driving well, learn heel/toe as well. And if you're really ambitious, learn left foot braking.

Good luck.

 

New tractor trailers as well.

 

??? new tractor trailers don't need to be double clutched???

 

youre right...

 

enough double clutch talk...anyone wanna talk about triple clutching?

 

They do get double clutched, unless you buy an automatic. New semis don't have synchros as well. To develop one to last the life of the truck is too cost prohibitive. Unless you don't use the clutch when shifting, which is easier, as long as your bosses don't find out.

I used to OTR and still hold my Class A.