I'm kind of an interloper here... I own a Miata, and I'm doing an LE5 swap. Since I always have a case of the "While I'm in there"s, I figured I may as well move to a lightweight flywheel/clutch setup. I have a couple of options that will work with my setup, and they weigh 10 to 15 pounds (depending on setup). I just want to make sure that I buy one that will keep the motor spinning at idle. What's the minimum weight to make that happen? I'm not super concerned with having the car easily streetable as far as ease of engagement, as this is my fun/autocross/track day car.