Quoting 92stroker:
FWIW, I have a QM twin, MAP flywheel, no shim under the fulcrum ball, and a 2g slave cylinder (no expansion chamber)... drivability with the listed combo was ok, but I've heard that running the expansion chamber with the 2g slave cyl makes it very drivable. That being said, I have this clutch in a daily driver that only makes about 380whp (on the spring), and the clutch only lasted me about 4000 miles. I'm not an aggressive driver, and while I put the clutch to it's intended use, I would say it had less than 30 launches on it. Hopefully I will only need to replace the frictions.
Before I had the QM I ran an ACT2600 with a street disc and stock flywheel... That combo was in the car for YEARS, probably 15-20k miles of daily driving, easily 300 full power launches, and multiple track days.
So if your planning on driving the car more frequently than a weekend warrior, I wouldn't recommend the QM.
just curious, whats the thickness difference between the QM and PTT? QM was originally my first choice, but i was turned away by the fact that you have to shave the clutch fork.
frankly, i love my PTT. 1g FWD slave, new 1g master, no expansion chamber, 1 shim, new pivot ball and fork, PTT discs/TOB/flywheel/hardware. 6k miles, dumb amounts of launches, antilag launches, rolling burnouts, rwd beatings, in the 400 awhp range. takes a little to get used to, i can slip it slightly, and drive it pretty smooth even in traffic. ive had the transmission out and apart multiple times, and every time i inspect the discs. they still have good thickness. its never slipped under any load what so ever. but on the same breath, people have reported smoking PTTs in 4k like 92stroker is saying. i also drive the way that curtis once described it: attack style driving.