I got this off of maximadriver.com...


Unfortunately, there are concerns with adding an aftermarket flywheel along with an aftermarket clutch: 1) With a stronger clutch, too light a flywheel may mean difficult engagement 2) even with stock flywheel, the VQ revs pretty quickly, making downshifts pretty quick. But how much improvement in acceleration is iffy. Lightening the stock fly is done on the back side of the it, not on the frtiction surface. Iron material will allow for 3-4 resurfaces, even after lightening (it should last the life of the car). Structural integrity is maintained even with the shaving, and should not be a concern.


I have an UR flywheel and a ACT clutch that will be going in this week. Is this a concern I should worry about. They are compatable right? Somebody on here has this I am sure of.

So I guess my question is ACT + UR Flywheel + LSD = ?

 

The main problem you may run into is starting off in 1st gear and making subsequent upshifts. The ACT clutch grabs much harder than the OEM, making smooth starts off the line more difficult unless you adjust your technique. That affect is amplified with a lightweight flywheel, as the reduced mass carries less momentum and thus rpms can drop more rapidly. You'll likely drive like a newbie for the first week or two, stalling the car off the line or giving too much gas and squealing the tires until you adjust.

Yes, there will be more stress put onto the drivetrain due to the more sudden I/O engagement, but if you drive reasonably there should be no net damage done to the tranny. The main problem is driveability, which you should be able to overcome within a matter of time. Just expect to be slightly frustrated with the combination for a little while until you adjust.

Re: the LSD, if you're talking a canadian Nissan LSD tranny (or US I30t), don't worry it won't stress the drivetrain any more over an open-diff tranny. If you're talking about a Quaiffe or Phantom Grip LSD, then yes, there will be additional stress on the drivetrain. Theoretically, though, the reduced slop in the differential transmits more torque (and more instantaneous torque transfer) to the drive wheels, which imparts more force and more stress on the driveline. Again though, it mostly depends on how you drive as to whether or not you will hurt the drivetrain in the long run. If you drive reasonably, then no you won't see any net ill effects.

 

Thanks for the info...So I should be ok once I get use to driving it. I will just rev up and grab like a bi$ch on take off and shifts, etc. This shouldnt cause alot of stress or anymore stress on the tranny (I30t) than normal. thanks again...