Quote:
Originally Posted by paulca
That's what synchros are for. Rev matching with the engine does nothing as the clutch is down the engine is not even connected to the gearbox. You rev match simply to prevent a lurch on a down change that might destabilise the car. So only really necessary when at the very limit.
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You can rev-match at any speed for smooth downshifting. I heel-toe everywhere when I'm not lazy and just popping it into neutral. Most my passengers don't even realize I'm driving manual at first.
Quote:
Originally Posted by paulca
Double de-clutching... would take him a lot longer than just waiting on the syncro.
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I can double-clutch a near perfect smooth downshift without even feathering the clutch upon let out. In NO WAY WHATSOEVER is this slower than merely waiting for the synchros. Synchros bridge small speed gaps, not large ones, and are thus much better for upshifting (not having to wait for rev to drop), and not as well for downshifting. Double-clutch downshifting forces the engine side of the gears to speed up to match (or nearly match) the faster spinning lower gears as opposed to waiting for the faster spinning lower gears to slow down (via braking) to match the slower spinning engine-side gears.