Quote:
Originally posted by 89transam
what is double clutching
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1 Shift into neutral
2 Rev engine (for downshift) or let it rev down (upshift) to where the RPM that the enging will be at for current speed in the next gear
3 Shift into next gear
You use the clutch twice, hence the name "double-clutching.) It reduces the amount of work the synchros do, and makes them last longer.
Power shifting is the same, but without using the clutch at all. Do not do this. I don't care how good you are at driving and shifting, don't do it. I'll laugh at you when you suddenly find that you can't shift into third because the teeth on the collar don't line up with the holes in the gear anymore.