Quote:
Originally Posted by SP33D
MM6 w/ 3.91
1st gear ratio: 2.66 10.42
2nd gear ratio: 1.78 6.97
3rd gear ratio: 1.30 5.09
4th gear ratio: 1.00 3.91
5th gear ratio: 0.74 2.90
6th gear ratio: 0.50 1.96
M10 w/ 3.45 w/ 3.91
1st gear ratio: 3.01 10.38 11.77
2nd gear ratio: 2.07 7.14 8.09
3rd gear ratio: 1.43 4.93 5.59
4th gear ratio: 1.00 3.45 3.91
5th gear ratio: 0.84 2.90 3.28
6th gear ratio: 0.57 1.97 2.23
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The key diference for road racing is the drop in RPM on each shift:
Assuming you shift at 6400 rpm the motor rpm will drop to these RPM's
MM6 w/3.91
1-2 shift rpm drops to 4,280
2-3 shift rpm drops to 4,673
3-4 shift rpm drops to 4,916
MM10 w/ 3.91
1-2 shift rpm drops to 4,398
2-3 shift rpm drops to 4,422
3-4 shift rpm drops to 4,476
The MM6 1LE trans keeps the motor in the upper rpm sweet spot between about 45 mph and 120 mph, but sacrafices some performance out of the hole in 1st gear (assuming full traction). Since 1/4 mile ET's are made in the first 60 feet, the MM10 is probably a faster drag race trans, assuming full traction.