"SHIFT ON THE FLY": shifting without clutching tri
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From: North Easton, MA
not to start anything but..
Originally Posted by Diluvium
well i forgot to mention it can wear out your syncronized rings. but its so "COOL"!!!!!! "COOL"!!!! im getting a new cluch anyway... and this is something pretty neat to show off, not a routine.
I got a better discription.....
"Shifting without the clutch"
It is possible to shift gears without using the clutch at all, by careful throttle manipulation. When transmissions were unsynchronized this was usually the easiest method, and still works in modern cars, although it requires a lot more practice than the usual methods described above.
Although the technique works in synchronized gearboxes, it is inappropriate in nearly all circumstances. A synchronized gearbox has a small clutch called a synchronizer (or "synchro") in every forward gear which brings the input and output rotation to the same speed before allowing them to engage. Like the main clutch, these synchronizing clutches use friction. These synchronizing clutches will allow for a margin of error when engaging without the main clutch. If the engine speed is somewhat too high or too low, the synchro will essentially take on the job that the fully engaged main clutch isn't doing. However, a synchro ring is not intended to do the job of a main clutch. Its job is to spin up or spin down just the input part of the transmission that is assumed to be disconnected from the engine. It is not intended to speed up or slow down the entire engine. Such experimentation done on a regular basis will prematurely wear out the synchro rings, which will have to be replaced.
On cars with a freewheel, such as the older SAAB with a two-stroke engine, shifting without the clutch is standard procedure. But actually, the freewheel is a form of clutch: one that is disengaged whenever the input rotation is slower than then output rotation. One must disengage the freewheel by allowing the engine revolutions to drop, which is analogous to pressing the clutch pedal.
I got a better discription.....
"Shifting without the clutch"
It is possible to shift gears without using the clutch at all, by careful throttle manipulation. When transmissions were unsynchronized this was usually the easiest method, and still works in modern cars, although it requires a lot more practice than the usual methods described above.
Although the technique works in synchronized gearboxes, it is inappropriate in nearly all circumstances. A synchronized gearbox has a small clutch called a synchronizer (or "synchro") in every forward gear which brings the input and output rotation to the same speed before allowing them to engage. Like the main clutch, these synchronizing clutches use friction. These synchronizing clutches will allow for a margin of error when engaging without the main clutch. If the engine speed is somewhat too high or too low, the synchro will essentially take on the job that the fully engaged main clutch isn't doing. However, a synchro ring is not intended to do the job of a main clutch. Its job is to spin up or spin down just the input part of the transmission that is assumed to be disconnected from the engine. It is not intended to speed up or slow down the entire engine. Such experimentation done on a regular basis will prematurely wear out the synchro rings, which will have to be replaced.
On cars with a freewheel, such as the older SAAB with a two-stroke engine, shifting without the clutch is standard procedure. But actually, the freewheel is a form of clutch: one that is disengaged whenever the input rotation is slower than then output rotation. One must disengage the freewheel by allowing the engine revolutions to drop, which is analogous to pressing the clutch pedal.
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Joined: Aug 2006
Posts: 1,520
From: Pittsburgh, PA
Originally Posted by Scott17
And when you "MAGICALLY" lunch your synchros, ask yourself how "COOL" was this?????????? 
I did it a couple times about a year ago when i found out how to do it. And i can do it very well, however the synchros still get all messed up for awhile after you do it. and yeah its way better to clutch, faster and smarter. I almost fell off my chair laughing when i read what you wrote scott!!!
Yeah its cool to show off MAYBE once to someone who will be amazed, but to the everyday standard tranny driver they will just think your retarded. my .02
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Scinergy
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Joined: Oct 2005
Posts: 430
From: North Easton, MA
yeah... haha.. you guys who think its safe should try it on an R1 then tell me if u thinks its safe.. yeah sure my bike shifted right in to gear.. then threw me off the bike.. yeah it was fun.. another example of why not to listen to people who think shiffting on the fly is safe.. good thing i was wearing a full jacket and pants set.. or i would have been dead. moral of the story dont shift on the fly no matter how cool you think it is.
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