More launch questions
 

I have another launch question. How exactly do I determine the true stall of my convertor. I have a glide with a brake and a 4000 stall convertor (advertised stall). Also when I find this out how do I use the stall rpm number to determine which chip to put in my two step? I posted similar questions already but I am new at this and want all the info I can get. Also if you can spell it out so I understand it, just don't want to miss anything. Thanks