Are you talking about shifting without the clutch at all? That can be terrible for you synchros if you arent perfect every time.

But i thought i was driving a race car . I heel and toe so does that make me a race car driver?



wait what? You dont need the clutch when you rev match? Than how would you rev match.

This post was edited by Krnboi12345 on Dec 9 2012 08:36pm

Let me get this straight. Double clutching is when you switch to neutral then switch to a lower gear, what exactly is rev-matching?

double clutch is when you're in a gear, pop it to neutral blip the throttle than put it back in a lower gear. Hence double clutch, you clutch in twice. Rev match is basically the same thing with one lesser motion. When you're in a gear, you clutch in and at the same time you blip the throttle, than you go to a lower gear.

its possible to shift without using the clutch at all if you can match the revs perfectly. You rev it to the RPM you are supposed to be in at a particular speed then just put it into gear without touching the clutch. Ive done it a few times just to try it and it works fine (a good technique to know if your clutch ever fails and you need to make it home, granted you cant really start off in first without a clutch to it only works if you never fully stop).
When executed properly its no big deal but if you are off slightly your transmission will let you know real quick. It will tear up your synchros and maybe gears if not dead on. I wouldnt recommend it.
Rev matching is just doing the same thing but using the clutch. You rev up the engine to the RPM it should be at and properly use the clutch to put it in gear.

Isnt that just called clutchless shifting, never heard it called a rev match.

well... sucks fat ones, but when I was in a bind with a screwed up clutch master in my 94 f150 I put in neutral, stopped, shut engine off, put in first, push clutch pedal all the way in, started. thus, truck started in first This is a disastrous idea though... burns up the starter.

Yes, but you have to rev match in order to clutchless shift. Rev match simply means matching engine revs to tire revs so that your engine is spinning at the right speed (depends on how fast you are moving and what gear you want to use)

A lot of term confusion in here. The only reason to rev match a synchronized trans is to make downshifts smoother under normal driving conditions. I don't mean coming up to a red light or stop sign. I mean downshifting when you need to drop a gear or two for a curve or turnoff. I don't know about you guys but I can't stand feeling my truck jerk and slow down when downshifting without a rev match. I also don't like thinking about the clutch and driveling absorbing the shock of 7400lbs and a few hundred lbs in rotating parts being forced to speed up by friction. Rev matching wont hurt anything, it only helps. Yes there are d-bags that rev match and downshift at 5k rpms just to make noise. That's a failure in application not technique.

If you look like vanilla ice and you drive a mustang you know im talking about you.

Wasn't me bro.