20X10 Rears and tune question

I have 19x9 1/2 without...

I have 19x9 1/2 without an SCT (should be here fri or sat ) and they spin with little effort; catch 3rd at about 80 no problem...

With just the SCT X-CAL 2 with 87 octane tune from Brenspeed, my '06 Automatic went from not smoking the tires on the start and luxury-smooth shifts into 2nd to roasting them(with TCS on) and breaking loose shifting to 2nd. Unless you are set up for drifting, isn't it best to actually have as little tirespin as possible? I mean sure it may seem cool from time to time, but you can get beat by lesser cars/drivers giving up those precious tenths. I'd rather I could stomp it and have it hook than have flashy tire smoke rolling out the fenders...

Without brake-torquing it, all mine would muster was 3 or 4 faint chirps out the hole.