Quote:
Originally Posted by iScream
I'd contribute to the cause, if it is done right. Rototest is the only dyno I've seen that almost perfectly replicates BMW's advertised curve.
Do they do the dyno test at WOT for all RPM? Or is it a gradual acceleration?
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WOT on all RPM with the dyno locking at a certain RPM i beliave.
It is a "steady state" dyno, my understanding is that it locks the RPM and then measure the maximum torque that the engine will provide even if it takes a certain time to provide the torque. I assume this means for example 1300 RPM locked and then they give full trottle and wait for the engine to give all it has at 1300 RPM. I guess this is why its called a "steady state" dyno.
The head of Rototest told me that the industry is working on a standard way of measuring engine behavior like lag during acceleration etc. He also told me that he as a industry professional found our worries "very interesting" and it would be a very strong proof if a car that was tested differed from the "old" 335i they tested back in 2006.