i guess none of u know gear ratio makes a huge difference in acceleration time
7spd SMG has a much closer gear ration compare to the 6MT, hence faster acceleration and the 7spd allows the V10 to be kept inside its powerband better then the 6MT
this is what i found on the M5 Forums:
Some thoughts about the comparative gearing of the E60 M5 SMG vs. 6-Speed manual:
-Both cars share the same 3.62 Final Drive.
-5th, 6th, and 7th gears in the 7-Speed SMG share virtually the same ratios as 4th, 5th, and 6th in the 6-Speed manual! (i.e. 4th gear in the 6-Speed manual is 2.5% shorter than 5th in the SMG, 5th in the 6-Speed manual is DEAD IDENTICAL to 6th in the SMG, and 6th in the 6-Speed manual is 4.5% shorter than 7th in the SMG).
-The "extra" gear in the 7-Speed SMG is found in the 2nd-3rd-4th area of the SMG gearbox (i.e. as compared to the six gears in the manual gearbox).
-1st gear in the SMG is 1.8% taller / longer than 1st gear in the 6-Speed manual.
-Reverse gear is 7.8% shorter on the SMG (i.e. 3.99 for SMG vs. 3.68 for 6-Speed
GUSTAV'S REPLY TO ME: But for "everyday racing" it seems like the manual
will see the taillights of the SMG, since most normal races do occur in the 2,3,4 gear area. Quote:
Originally Posted by Gustav
Thanks to HadE55NowM5 I posted the gearign charts:
BMW E60/E63 SMG
1st 3.99 45 mph (73 km/h) @8250 rpm
2nd 2.65 68 mph (110 km/h) @8250 rpm
3rd 1.81 101 mph (164 km/h) @8250 rpm
4th 1.39 131 mph (213 km/h) @8250 rpm
5th 1.16 158 mph (256 km/h) @8250 rpm
6th 1.00 171 mph (277 km/h) @?
7th 0.83 ? ??
Final Drive: 3.62
BMW E60 6-Speed Manual
1st 4.06
2nd 2.40
3rd 1.58
4th 1.19
5th 1.00
6th 0.87
Final Drive: 3.62