i'm interested in knowing as well. I don't usually look at the tach when I launch, but ever since I went to 18' Mickeys, I've had trouble launching. It feels like it falls on its face. I'll have to start looking at my rpm's and figure out what works best. BTW, I run my Mickeys at 20 psi. No spinning problems yet cuz I don't know how to launch on them yet.
12.618 @ 110.75 Bone Stock 1/4 mile
8.165 @ 86.52 Bone Stock 1/8 mile
11.189 @ 124.44 on a 1.73 60' TVS2300 3.4 pulley, JRE tuned, Kooks LT headers and HF cats, MBRP catback exhaust, CAI intake, ADM scoop. Stock wheels/tires.