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      06-10-2013, 10:34 PM   #111
CanAutM3
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Drives: 2019 M4cs
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Quote:
Originally Posted by flinchy View Post
yes, moment of force is what torque is, if you have a read of what i said, i clarify that torque is the force 'at a moment' and power is torque over time.
I guess you have not read what I wrote , moment here has nothing to do with the notion of time...

To be more precise, power is force applied on a distance over time; or in the polar referential: torque applied on rotations over time.


Quote:
Originally Posted by flinchy View Post
ED: at those 1m shift points... what's happening there?.. shift at 4250rpm? i can't read that graph haha

ahh is it some misc 'acceleration value'?

but yes, the 1M being a bit beefier in the midrange shifts a bit sooner than totally stock 135i's.... though it's still a case by case basis.. N54 to N54, you can have shift points varying up to 500rpm depending on the gear.
The graph I posted shows wheel torque (flywheel torque multiplied by the gear ratios) vs road speed for each gear (I should have included a legend, my bad). When the line of a gear crosses the line of the next gear, it is the optimal shift point. If the lines do not cross, it implies a shift at redline. Since some of the lines do cross, it means that those gears need to be shifted before redline. If you want the RPM shift points, you need to back calculate the RPM based on the road speed.

For the 1M, this means
1-2 68 km/h -> 7000 RPM
2-3 121 km/h -> 7000 RPM
3-4 173 km/h -> 6700 RPM
4-5 221 km/h -> 6525 RPM
5-6 259 km/h -> 6475 RPM

This is the power curve I used:
Attached Images
 

Last edited by CanAutM3; 06-10-2013 at 11:11 PM..