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I don't understand how rev-matching without putting the car in nuetral helps. I've heard that it isn't necessary to double clutch with modern cars for smooth downshifts but I am under the impression that the speed of the layshaft won't change unless you double-clutch. So what I'm asking is for someone to explain how rev-matching without double-clutching works.

 
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The synchros match the shaft speeds, thats their job. So on a syncornized gear box, double clutching is unnessisary.

Though if you do double clutch, your synchros will last a bit longer. Especially so if you do multiple gear down shifts.

 
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Ok thanks. So do you double-clutch or rev-match?

 
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I do alotta rev-matching... keeps you in your power band so when you need to go, just go.

 
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Both.

 
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I tend to rev-match. I just stay on the clutch. Double-clutching feels kinda unnatural o_0

First Post!

 
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i rev match

 
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I usually double clutch but in my new car the revs drop so fast (and I get free maintenance for 50,000 miles) I am thinking about just rev matching without releasing the clutch.

 
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i rev match...but what ive noticed about alot of people who drive manual is that they dont rev match at all and the car(wheels) and engine speed dont match and it jolts the car hard...when downshifting that is

 
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Rev matching is key if you don't want to upset the chassis. This is a very big ordeal when you are talking about sport bikes. I would think that it would be important for cars as well.

 
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rev matchin is where its at smoothest shifts around!!!

 
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I rev match with heel-toe most of the times that I downshift, even on my accord when I can't really reach the gas pedal from the brake. It just makes you a ton better at heel-toe when on the track.