Quote:
Originally Posted by swamp2
Better yet how about actual drive force in N vs. speed? Drive force is even more fundamental than wheel torque and can be better compared apples to apples. That being said acceleration is loosely force/mass and these curves do not include the 1Ms mass advantage.
For the 1M have assumed a torque curve shaped like the one supplied by BMW but with a peak value so that 360 hp is the peak hp. The factory supplied curve is used for the M3. Both cars use a 12% drive train loss.
Prior conclusions I've supplied are consistent with this. The cars are close. M3 on left 1M on right. - 1st gear - About even. Slight advantage for the 1M in lower speeds (only if you can avoid wheelspin, which typically does not happen WOT...). At higher speeds the 1M dips down to about 13kN, however the M3 never goes below 15kN.
- 2nd gear - advantage to M3 (especially since we are concerned with the part to the right of the intersection with 1st gear curve in blue)
- All other gears clear advantage M3 (assuming WOT and shifts at redline of course)
You can see the effect of the high redline and very wide torque curve in the M3. The M3 curves just keep going and stay flat while the 1M curves all badly taper off. These curves do loosely mirror the torque curves in shape. You can really feel this too when driving - the M3 just goes linear like a turbine engine, whereas the harder you push the 1M the more it falls.
Note: Real world curves will obviously be smooth. This is an artifact of rpm "bins" rather than smooth power and torque curves.
Funny how good power to weight predicts things compared to crank torque. |
If you fancy some additional science and logic on top of what you have already provided for us please check this older thread as well:
http://www.1addicts.com/forums/showthread.php?t=668630
You may find posts 35 and 52 more interesting and challenging than most others. There are some useless posts there like always, but mostly a fun and interesting read so if you don't feel too lazy I advise checking all thread.
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"The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris.
BMW 1M-SOLD-: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, BMS OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake.