stall is when u power brake it and watch the tach. with the brakes applied u push the gas untill the rpms stop climbing. thats youre stall speed. so in a stock car with a 1500 stall converter with the brakes fully applied and pushing down on the gas the rpms will rise to 1500 then stop. if I got a high stall converter i would also get a transbrake so I wouldn't wear the brakes out. you turn the trans brake on rev it up to lets say 4000 then when the lights come down you let go of the transbrake and your car will launch realy hard. just remember the higher stall you get the more powerful the motor needs to be. and of course like everybody before me said if you get a realy high stall you wont have much acceleration at low rpms. also when you're racing you dont want the converter locking up because this gets rid of the tourqe multiplication. i run a toggle switch on my 700r4. not shure if you'd be able to control ur 4l80e.

 

That really is not true. Lets say you have a 3000 rpm stall converter. This DOES NOT mean that you will sit with the car in gear and be able to rev the engine to 2900rpm before you move, not at all. Maybe i am misunderstanding what you meant in your post but i just wanted to clear up this misconception. For example, stock stalls are somewhere between 1600 and 1800rpm from what i have heard. My car starts to move just by letting off the brake and not even touching the throttle, when obviously the engine is not turning anywhere near 1600rpm, more like 600. Now i do not have a stall converter, but from reading numerous posts it seems that cars with 3000 stall converters will move just by letting off the brake and not even touching the gas, again, the engine will, of course, not be turning 3000 rpm. The point of stall converters is to get the engine in the power band faster, this is what is referred to as "flash stall". For example, lets say you have a 3000 stall converter and you take off from a light at normal speed, then you floor the gas, the engine will "flash" to somewhere around 3000 rpm, depending on gearing, engine power, weight of the car etc. Now with a stock stall in the same situation the engine would only flash to somewhere around 1800 rpm. Now, as you can see, since the engine will be turning 1200rpm faster it will be making more power and hence provide better accelaration.