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      08-27-2012, 02:30 PM   #1
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M3 Gearing?

How tall is the gearing on a 6MT M3? At what max speed do you shift into 2nd, 3rd and 4th?

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      08-27-2012, 02:41 PM   #2
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Also... how difficult is it to money shift the car in 2nd? It seems like with an 8400 rpm redline, it shouldnt be a problem.
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      08-27-2012, 02:56 PM   #3
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Max road speed in gear (8300 rpm) on stock tires with stock 3.85:1 rearend:
1st: 42
2nd: 71
3rd: 107
4th: 142
5th: 169
6th: 194
Reverse: 46

3-4 shift is pretty easy to get right compared to older BMW shifters. Still a BMW shifter though, so now I'll probably miss 4th on my way home tonight
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      08-27-2012, 04:12 PM   #4
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Practice. It is OK to hit the rev limiter. Just don't do a mechanical over-rev, such as upshifting from 3rd into 2nd.

For maximum performance shift as close to the limiter as possible. For less than maximum performance, shift sooner.

For daily driving shift where you want as long as you do not lug the engine. The S65 does not have much torque and won't pull the car up much of a hill in 5th gear at 2000 rpm although it could probably trundle along fine on level ground at that rpm. Lugging can damage the engine. Some people may do most of their daily driving shifting at 5000 rpm, others at 4000 rpm and others at 3000 rpm.
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      08-27-2012, 08:04 PM   #5
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Interestingly, when you enable the Efficient Dynamics feature (can turn on with aftermarket coding), recommended shifting for maximum fuel efficiency occurs between 2,300 and 2,700 rpm depending on the gear.

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Originally Posted by pbonsalb View Post
For daily driving shift where you want as long as you do not lug the engine. The S65 does not have much torque and won't pull the car up much of a hill in 5th gear at 2000 rpm although it could probably trundle along fine on level ground at that rpm. Lugging can damage the engine. Some people may do most of their daily driving shifting at 5000 rpm, others at 4000 rpm and others at 3000 rpm.
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      09-07-2012, 09:34 AM   #6
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Originally Posted by mhabs View Post
Interestingly, when you enable the Efficient Dynamics feature (can turn on with aftermarket coding), recommended shifting for maximum fuel efficiency occurs between 2,300 and 2,700 rpm depending on the gear.
seconded this, if you have the dct, that's when the auto mode shifts. Depends on how hard you slam the pedal, but cruising around it shifts before it hits 3k rpm. thats how I get 11.8L/100k. So if you have the 6mt, shift between 2-3k for fuel economy @ 8300 when you want to have fun.
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