I think the last time that I did a brake stand to estimate the torque converter stall speed, the tires broke loose around 2500-2600 rpm, and that was bone stock. I tried to do a test today, but the ground apparently was too wet the the drizzle and humidity since I get nothing but smokey mud tires and rubber on the side of the vehicle. On days like today I can forget about stabbing the throttle and expect to move anywhere.