Sorry for sounding dumb, but I just saw a dyno graph of a cam only trex a4 putting 420's rwhp to the ground locked and unlocked was like 380's. I have a yank 4000 extreme stall - when i get it dynoed, how can i 'lock' it up? Or can I?

 

Lock up is when the tc is physically connected to the drivetrain as opposed to unlocked when it is hydraulically connected. Lock up is accomplished by using a clutch that is actuated by a solenoid which is, in turn, controlled by the pcm or a lock up switch.