Have tried with both. As soon as i turn off TC it turns tyres hard off the line. Would be pretty awesome to be able to take off hard without turning tyres yet still having as much power as possible to still keep traction. At the moment as soon as it starts to turn them it just basically shuts off the throttle and leaves you with a foot full of nothingness haha. Hopefully there is a way of being able to adjust the level of throttle control within the traction control. I know it can be done with the older LS1's so i was hoping(fingers crossed) it could be done with these computers as well.