Quote:
Originally Posted by Bob Cosby
3.73s probably won't be quickest on hard-compound street tires because the extra torque multiplication at the wheels will likely be wasted on the launch, and at each shift via increased tire spin. Put a tire on the car, and a driver that knows what he is doing, and that will change.
Also, 3.73s will put a stock 5.0 right into the 6850 rpm "soft limiter" at the end of the 1/4 mile in 4th gear. This will admittedly have very little effect on ET but will show up as as a lower trap speed.
If I wanted to get the quickest stock 5.0, I'd likely opt for 3.55s, and hope I could find a track with enough bite to allow me to take advantage of the small increase in gearing (3.31 to 3.55).
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I can personally vouch for this. 3.55 is the best gear to get on the 2011 GT if you plan to run a stock car on stock tires.
This past weekend I made a few passes on my base GT with 18" wheels with all season tires and a 3.73 and came away with the following -
Bone stock 2011 GT. Best times were (uncorrected):
60': 2.25
ET: 13.68
MPH: 107.78
60': 2.23
ET: 13.69
MPH: 106.61
Best 60' of the night was 2.16. I could not launch without traction control on and with it on was still spinning the tires in every gear throughout the 1/4 with T/C on. On the 2.16 60' run the traction control complained when I shifted into 4th and bogged the car down. I was on track for a 13.4 run before that.....
DA for those runs were 2,184 and 2,405 respectively.
BTW - I have been down the 1/4 many times in the past and maybe while not the best driver out there, this old man isn't too shabby.