Quote:
Originally Posted by Madozu
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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Good example of why the shape of the dyno curve is critical, as area under the HP curve, not peak hp to weight, is critical.
There are a number of dynos floating around to model from, such as these for the 320 hp 35is. Obviously the 1M is going to breath better up top than this, so I may have been conservative killing power about 6000 as fast as I did in my estimated dyno.
http://www.bmwblog.com/2010/09/12/dy...vs-n55-engine/
BTW, I think your weight number above is off.