Re: PI converter stall
Might be a little backwards there. I don't know really, but this is my guess.
Lower stall on a Powerstroke will be more doggy, or slower just casually putting off idle around town, traffic lights, stop signs. Higher stall will let the RPMs raise, more power, more boost, more whatever and the truck will start to move a little later than the lower stall making it not as a "dog" since you're already up in some RPMs.
You obviously wouldn't want a 1,200RPM stall on a 600RWHP 7.3L.