[masraum]

Originally posted by island911
Great advice!?

Quick shifting about timing. (915 or G50) If one pauses to shift, the rev's drop too far and the syncros have to work much harder to re-match speeds.

Chirping tires happen more easily with a slight delay in letting the clutch out (more energy in the flywheel). . . a slower shift.

I suspect that there's a misunderstanding someplace.

I believe that I said that shifts should be deliberate and slow, not so slow that the revs fall too far though. I also said that you don't want to shift so quickly that you chirp the tires.

In my experience chirping of tires usually happens if you shift too quickly and let the clutch out so quickly that the engine revs are too high for the speed and gear and the tires slide for a tiny bit until the revs drop. Or it could be because you let the revs drop too low and let the clutch out too quickly which is the opposite of what I said before. The third and more rare instance that I know of that will chirp the tires is that you may have the revs perfectly matched, but you've got too much gas on so the engine accelerates and spins the tires. Regardless it's not smooth and is causing undue stress on various parts.

If the revs have to be changed up or down to match then your shift was off and will cause stress to the system. If you chirped your tires then there was enough force to break traction. That much force causes a fair amount of stress and strain to CV joints, tranny, clutch, tires, bearings, etc...