Quote Originally Posted by Drummerboy
I have a lightened flywheel. 2.2L T3T4.

I do tend to drop out of boost quick unless I'm haulin' balls and just poppin' the clutch.

I have no logged Data, but i would think you would be fine with a 12lbs flywheel.
The lightened flywheel would allow the engine to rev quicker and the turbo to spool faster...the only downside that I can see is the revs drop faster when off the throttle between shifts, which means boost significantly drops, possible lag, etc...with that only really being an issue if you aren't getting on it? Couldn't that be easily fixed with a little spray if was really an issue?

Then there could potentially be a slight loss in torque at the top end. Let's say I have a 7k RPM 2.8L with a GT30R making around 360whp & 400 to 420 lbs-ft torque @ 10-12psi with full boost reached under 2,800 RPM's. With a 0.140" head gasket and ARP studs the engine will hold up to 25psi...think I can afford to give up some "torques" for an insane throttle response?

I'm looking at a 8.5lb flywheel with a sprung "cerametallic" M5 clutch kit.
http://www.uucmotorwerks.com/flywheel/LFWLE36SH.htm