No Clutch Shifting 3109Back in high school we used to call it "speed-shifting". Originated, I presume, with racers, to minimize time that HP was not going to the wheels. There' a...
What you (and John) are neglecting are the relative sizes of the (synchro) clutches vis-a-vis the main clutch. The synchro clutch *does* adjust the speed of the input shaft to output shaft; however the size is only sufficient to speed-slow the clutch disk, input shaft and cluster gear. The rotational momentum of that sub-system is quite small compared to the engine's. Unless you're rev-matching, a jerk and possible gear damage is the result.
No Clutch Shifting 3110No, sorry. There is no particular range where the gears are any more aligned than at any other time. The big thing for some race cars is...
Try this: find a long downhill slope (coming down from Grouse or Cyprus should work). Take your car out of gear, let out the clutch (if you used it), and let the car get going above the speed at which idle would be in that gear, then try to get it back into gear. The synchro doesn't have enough friction to speed the engine back up to re-engage that gear (unless you rev-match with the throttle) thus disproving your buttertion.
I suspect that Harry hadn't realized that the conical surface of the synchro ring *IS* a clutch - although a very different one than the main clutch - geometry and materials are not a match - although the materials look quite a bit like the clutches in an auto tranny.
FloydR
