mine is an automatic, i would think a second gear start would make do the time a bit slower? im going to try it anyways today, my car as an automatic wont spin the tires on launch ever, unless im taking a turn , then i power slide, for comparisson though i ran our 300m and it did the accelration time in 8.88 seconds shave a few off for human delay 8.5 , and my toyota highlander 4wd in 13.33 seconds... my crossfire is still the quickest of the three, i just cant get it in the acclaimed 6 second range, although i think thats the Arizona height above sea level doing its thing