double clutching
Thread Starter
Instructor
Joined: Feb 2004
Posts: 132
Likes: 0
From: hendersonville nc
Originally Posted by WaWaTuSi
"Rev-matching refers to matching the engine speed to the transmission input speed before re-engaging the clutch. Good for downshifting into a corner. In a hard corner, the suspension needs to be stable and the tires need to be loaded so that all of their traction is being used to generate cornering force. If the engine is at a different speed than the transmission input when the clutch is re-engaged, this will generate a force on the driveline that will upset the stability of the suspension and will cause the tires to exceed their traction capability if the corner is being taken near the limit.
It *is* necessary to rev-match if a corner is to be taken near the limit. It isn't necessary for slower corners, but it will make them smoother.
Double clutching is a technique for rev-matching the transmission's *intermediate shaft* to the output gear that is to be selected. This is a function that is normally handled automatically by the transmission's synchro-mesh gears (or synchro's). It is useful to double clutch for extreme gear changes, for older transmissions with worn synchro's, or simply to save wear on the synchro's. It's also an entertaining thing to do. "
"Double clutching" has nothing to do with so-called "amatuers" or "Beginners" as described by ztheusa when talking about a modern sports car such as the C5 and IMO unless you have a need to such as you seem to or are going from 5th to 2nd for some odd reason, it is a waste of time.
It *is* necessary to rev-match if a corner is to be taken near the limit. It isn't necessary for slower corners, but it will make them smoother.
Double clutching is a technique for rev-matching the transmission's *intermediate shaft* to the output gear that is to be selected. This is a function that is normally handled automatically by the transmission's synchro-mesh gears (or synchro's). It is useful to double clutch for extreme gear changes, for older transmissions with worn synchro's, or simply to save wear on the synchro's. It's also an entertaining thing to do. "
"Double clutching" has nothing to do with so-called "amatuers" or "Beginners" as described by ztheusa when talking about a modern sports car such as the C5 and IMO unless you have a need to such as you seem to or are going from 5th to 2nd for some odd reason, it is a waste of time.
THANKYOU! That was veyr helpful! I love this forum... less BS and more info!
Premium Supporting Vendor
Joined: Oct 2004
Posts: 36,838
Likes: 438
From: Manassas Park VA
St. Jude Donor '07-'08,-'13-'14, '16-'17
There is a practical application for double clutching as well.
When it is real cold out and you get started driving your car, it tends to "catch" a gear for a while until the tranny gets warmed up.
When you double clutch you car when it is cold, it will prevent you from "catching" a gear until it gets all warmed up...
Try it you'll like it!
Peace
Willfulone
When it is real cold out and you get started driving your car, it tends to "catch" a gear for a while until the tranny gets warmed up.
When you double clutch you car when it is cold, it will prevent you from "catching" a gear until it gets all warmed up...
Try it you'll like it!
Peace
Willfulone
...now thats edifying 
