Yeah we definately need more info on both so that we can make a confident decision.

 

I dont know much about clutches but why would there be a sound change at idle from a new clutch?
Will this do any good on an NA car? I do plan on getting a vortech but i'm just wondering if I got the clutch before if there would be any problems.

 

Becuase the floating carbon disc essentially rattle at idle when the flywheel isnt spinning very quickly. I would consider the slight increase in noise a minor issue, given the level of performance you will get from this clutch.

 

Yes and lighter flywheels (Tilton lbs << APS lbs) absorb less of the tranny noise harmonics. From the "cement mixer sound" perspective the Tilton is pretty much the loudest from what user/members have shared.

 

The lighter the flywheel the quicker it will be to rev. Unfortunately the lighter the flywheel the harder it is to launch.

 

A really light fly on a TT (such as Tilton), especially an APS which produces significant TQ even at 2k-rpm, would be counter productive IMO. I'm more concerned with durablity and driveablity.

 

I couldin't have said it better myself. If ATS would offer the "heavier flywheel" option for the 350Z I would definately consider it.