I wanted to use my Dragy to measure my 0-60 time. I have race exhaust and did a ECU tune. The car violently broke loose and nearly went sideways. I had to let off to regain control. Tried a second time and the same thing. What heck am I doing wrong? I put it in corsa, turned off the ESC held down the brake and pushed the pedal to the floor. The rpms rose to almost 5K and I released the brake. Insane, scared the crap out of me.