Quote:
Originally Posted by mike the snake
There are many companies selling lightweight flywheels as part of their clutch packages.
Not sure how much it would cost to lathe down a stock flywheel, but ACT and Excedy both sell clutch/flywheel combos for $4-600.
I don't know if those flywheels work with the OEM clutch either, but there might be a lightweight flywheel available that works with the OEM clutch if you didn't want to upgrade. Usually not necessary unless you're going FI.
Yes, going to a lightened flywheel will make a huge difference compared to the pulley swap, and probably for less $$ than one pulley. It will help both revving up, and down.
ACT sells their Race-lite (10.5 pounds) and their street-lite (11.8 pounds) and others are in the 11-12 pound range.
People have reported needing to raise the idle a little to keep from stalling, and it's a little easier to stall the car when taking off from a stop.
That's it in a nutshell unless I've missed something.
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I've got an ACT streetlite flywheel, heavy duty pressure plate, and their performance street clutch on my STI. The car revs a lot faster, bogs less, and clamps better. The stock clutch would get some bad shuddering from time-to-time. It's a worthwhile upgrade when the stock clutch is done, probably overkill on an NA BRZ. The flywheel would make a big difference for revs, though.