Rogue, lots of guys are still running single disk clutches on higher horsepower DSM setups. Reason being, there aren't any really good twin disk options for us. Most of the guys that ran Quartermasters (including myself) sold them for pennies on the dollar. Even for a car that sees strictly track use, some guys have trouble getting the car to launch. I didn't, but they can be very tricky. I run a 2600 with street disk and see no reason to change.
Jimmy Read
1991 Talon TSI AWD - Bests: 10.932 @ 127.78 ( FP 3052 ) RIP
1991 Clone - 11.3 @ 124 - FP 76HTA pump gas powered 42K mile street whip