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      12-13-2010, 08:41 AM   #43
Madozu
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Drives: 1M / M3 E36 3.2 6MT
Join Date: Jul 2010
Location: In the twisty roads of the Alps

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Quote:
Originally Posted by swamp2 View Post
@Robert and Madozu. Here is the torque curve I used assuming 369 ft lb (the graph kind of sucks and it would be visually easier to read in Excel but this is how CarTest belches stuff out...).

Ultimately the shape of the curve is not too vital to getting a good simulation. And obviously the sharpness of the peak here in my curve is entirely non physical. Also, if you assume 332 ft lb peak instead of 369 ft lb you do get a more flat torque plateau. The higher peak torque though will have to drop faster less the peak hp number could not be the same...
Just played around with my (quite old) version of CarTest 2000. As Swamp showed, the 50Nm overboost doesn't make a huge difference ... but setting max. torque at 1500 rpm or 4500 rpm makes quite a bit of a difference. I was using identical data of a 1M with one exception:
  • BMW 1M (LOW) has max. torque at 1500 rpm
  • BMW 1M (HIGH) has max. torque at 4500 rpm
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