granny shifting and double clutching

[talontedEcLiPsE]

Also dont confuse double-clutching with Power-shifting....

Double-clutching is basically just for shifting when coming out of a turn. You could move the shifter to neutral and then back into the same gear, but the main point is to try to match the trans speed with the engine speed, such as when you downshift from 3rd to 2nd, you push the clutch in, shift to 2nd, give it some gas to put the rpms up a little higher than they were in 3rd, and you have a nice smooth ride. This is a better idea than downshifting and just giving it a little bit of gas, so that the trans starts "dragging" to get you up to speed/rpms.

Power shifting is when you keep the gas about the same when you press the clutch down, shifting, and then popping the clutch and flooring the gas. This is not only used in downshifting, but for going from 1-2, 2-3, 3-4, 4-5. The reason for this is to keep the RPMs in the engine's powerband, so that all the horsepower is being used.

[RockinWRX]

Originally posted by talontedEcLiPsE
Also dont confuse double-clutching with Power-shifting....

Double-clutching is basically just for shifting when coming out of a turn. You could move the shifter to neutral and then back into the same gear, but the main point is to try to match the trans speed with the engine speed, such as when you downshift from 3rd to 2nd, you push the clutch in, shift to 2nd, give it some gas to put the rpms up a little higher than they were in 3rd, and you have a nice smooth ride. This is a better idea than downshifting and just giving it a little bit of gas, so that the trans starts "dragging" to get you up to speed/rpms.

Power shifting is when you keep the gas about the same when you press the clutch down, shifting, and then popping the clutch and flooring the gas. This is not only used in downshifting, but for going from 1-2, 2-3, 3-4, 4-5. The reason for this is to keep the RPMs in the engine's powerband, so that all the horsepower is being used.

Thats not double-clutching either , thats rev matching. I already explained D-C'ing earlier , maybe you should read it...........

[kjewer1]

Power shifting is shifting with no clutch. You shift the tranny "under power" hence the name. Keeping the gas floored while shifting with the clutch is called speed shifting. Everyone screws this up, but this is the way it is. Powershifting is done only on tranny that can take (dog box typically) and speed shifting's only real benefit is on turbo cars, its a fine way to keep the turbo spooled. There is no lag if boost never falls None of this has anything to do with keeping the engine in its power band. That can only be done by gear selection. No matter what you do with the clutch in, once you let it out the rpm is determined solely by the wheel speed of the car and the gear ratio you are in. Its a direct mechanical link. Many people are confused by this concept.

[myeclipseisnicer]

[RockinWRX]

Originally posted by 95 GSXracer
Power shifting is shifting with no clutch. You shift the tranny "under power" hence the name. Keeping the gas floored while shifting with the clutch is called speed shifting. Everyone screws this up, but this is the way it is. Powershifting is done only on tranny that can take (dog box typically) and speed shifting's only real benefit is on turbo cars, its a fine way to keep the turbo spooled. There is no lag if boost never falls None of this has anything to do with keeping the engine in its power band. That can only be done by gear selection. No matter what you do with the clutch in, once you let it out the rpm is determined solely by the wheel speed of the car and the gear ratio you are in. Its a direct mechanical link. Many people are confused by this concept.

And just to clarify , Power shifting is not something you wanna attempt with a stock DSM tranny. Maybe the B+M and Shepherd rebuild can handle it , but no way on the stock one. Corvette and Vipers can handle power-shifting as well , but those trannys are tons beefier than a DSM. 90% of it is the fact that with the Corvette and Viper trannys , the stick shifter is directly engaging gears inside the tranny , whereas DSM's and other FWD and AWD cars (Noteable exceptions being the Subaru and the Skyline GTR ) have cables attaching the shifter to the tranny . Its the slop in the cables that contributes to the inability to power-shift.

[myeclipseisnicer]

damm rockin wrx u know ur shit. lol

[kjewer1]

Even with a different type of shift mechanism, I still done think I would be comfortable power shifting a DSM tranny. The hub and slider break enough as it is, and the brass synchros are small... But that is a conributing factor for sure.

[RockinWRX]

Originally posted by 95 GSXracer
Even with a different type of shift mechanism, I still done think I would be comfortable power shifting a DSM tranny. The hub and slider break enough as it is, and the brass synchros are small... But that is a conributing factor for sure.

Yeah , maybe with shifter mods , but the stock shifter , especially the older 1G ones , are way too sloppy.

[mfmark5007]

Xj...you're right


--When double clutching....you increase rpm when downshifting and let the rpm drop while upshifting