Shifting from 1st to 2nd

Joe@ZSpeed · 03-23-2020, 02:03 PM

The "jumpiness" is created by a few things.

The Dual Mass flywheel being sprung as well as the clutch causes more drivetrain lash (jumpy #1)
The Stock clutch is a self adjuster which causes a very quick roll over of the diaphragm spring in the clutch (jumpy #2)
The pedal has a assist spring which eases pressure with foot on floor, This is aggravated even more by #1 and #2

If you replace #1 and #2 with a ZSpeed clutch/flywheel package this all goes away

A lot of people blame this on the "Rev Hang" but in reality it really has nothing to due with how the stock clutch drives and also is not because of the heavy flywheel (this is ECM controlled) Old cars used to have "dashpots" on the carb which would slowly bring down the throttle.
The rev hang actually allows quicker shifts to the next gear as the RPMs are matched better.

03-23-2020, 02:03 PM	#21 (permalink)
Joe@ZSpeed A True Z Fanatic Join Date: Mar 2011 Location: Ohio Posts: 1,304 Drives: Nissan Rep Power: 343000	The "jumpiness" is created by a few things. The Dual Mass flywheel being sprung as well as the clutch causes more drivetrain lash (jumpy #1) The Stock clutch is a self adjuster which causes a very quick roll over of the diaphragm spring in the clutch (jumpy #2) The pedal has a assist spring which eases pressure with foot on floor, This is aggravated even more by #1 and #2 If you replace #1 and #2 with a ZSpeed clutch/flywheel package this all goes away A lot of people blame this on the "Rev Hang" but in reality it really has nothing to due with how the stock clutch drives and also is not because of the heavy flywheel (this is ECM controlled) Old cars used to have "dashpots" on the carb which would slowly bring down the throttle. The rev hang actually allows quicker shifts to the next gear as the RPMs are matched better. JARblue, Rusty, Ghostvette and 2 others like this. __________________ http://photos.zspeedperformance.com/...ardsize=468x60 Phone *937-506-7224* E-Mail Sales@Zspeed.com www.ZSPEED.com Last edited by Joe@ZSpeed; 03-23-2020 at 03:51 PM.

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