the part I just really came to understand is true stall is affected by the torque of a specific engine. While some manufactures quote typical stall, its misleading when you put it behind a 400 torque engine vs a 600 torque engine. First time in my life to go with a stall converter behind my new BBC, researched the heck out of it, web and face to face with trans shops. Decided on an advertised 2800-3200 stall for my Elky, have been driving it now and find 3500 is what it really stalls to. Man does it feel awesome, gets the car into the power band and then goes like stink. Sitting still, with brakes held tight and then giving it gas slowly when 3500 comes in the car will move regardless of the brake pressure. Cant wait to get er broke in and really do a power pull.