04-02-2009, 10:07 AM
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#9 (permalink)
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A True Z Fanatic
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
Rep Power: 3595
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Quote:
Originally Posted by tbonesteak
double clutching is no longer necessary on today's transmissions. In the 70s yes it was necessary. lol
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You're right that it's no longer necessary (even in the 70s I think it was already unnecessary) with synchronized manual gearboxes - however the practice still has benefits. The extra engagement at the correct rpm mid-shift (while in neutral) spins up the clutch plate and the input side of the gearbox to the rpm you plan to engage the gears at. Then when you (quickly) re-depress the clutch and engage, there's less rotating mass spinning at the wrong speed for the engine to overcome inertia on, which means a smoother shift, which means less "kick" at the rear tires, which can be really important if the shift is happening during a hard turn where you're using most of your tire grip just to hold the corner.
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