Pros and cons of lightened flywheel ? Options

[sixaddict]

Have a 3 liter with 46s in 914…..Trying to decide if I want to install a lightened flywheel I have on the shelf. Basically a track car.
Looking for input from anyone who has made that change.
Thanks ,

[technicalninja]

Dedicated track car I want the very least MOI in the clutch assembly.

Dual disc 5-6" tiny clutch on what looks like a TINY flywheel welded to a flex plate.

Weighs 1/4 what that stock stuff does...

Solid disc, no marcel, no springs in center, bitchy to launch, ceramic or sintered metal pucks, NOT street friendly at ALL!
This set up often rattles like a bitch at idle! Noisy, hard to launch, almost have to spin tires at launch. Bitchy to put on trailer...
The clutch pedal is more like an on/off switch and the initial bite is grabby as hell.

Street cars are the exact opposite in my book.
Heavy flywheel (not stupid heavy), disc with organic faces, marcel, sprung center (if stock has 4 I'd want more).

Smooth, grandma can operate it easily. The heavy set up makes things like AC affect the idle less and, in some cases, the extra weight acts as a damper and helps to isolate the transmission from individual firing pulses.
This can increase transmission input shaft bearing life.

A dual-purpose street-track car would be somewhere in the middle.
Light weight stock size, HD clutch with organic on one side and ceramic on the other
Either marcel or sprung center (big ass springs!).

Now, the above is generic advice...

I don't know what is available for 911 stuff. I would think "skys the limit" and someone has made the dual disc set up already.

If I was building a track focused car and I had either a heavy or a light available, I'd start with the light weight stuff first.