Quote:
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Originally Posted by ROBNYC
Quote:
Originally Posted by Max Well
As jtd posted a video produced by /AutoTopNL, entitled 'BMW X4 M40i van Laarhoven BMW, Acceleration' two days ago [ http://x3.xbimmers.com/forums/showthread.php?t=1229978 ], in which the film shows simultaneous time and the instrument cluster, it became possible to extract some data points.
As the chart attached shows, these were chosen randomly across that vehicle's acceleration time, and then graphed against the Simulation's hypothetical curve attached some time ago.
As expected the sim has difficulty modelling the first few seconds take-off as so many traction variables are at play, but by 3.2 sec it tracks the real data quite closely and the curves essentially sumperimpose. By 26 seconds the real X4 begins to show higher than expected speeds and ends with a top speed 6.4 km/h higher than the sim predicted (260 km/h [161.6 MPH] vs the sim 253.4 km/h [157.5 MPH]). As the video does not identify the track course, the differences in road grade along the way, wind speed or direction, or elevation, it is difficult to make any conclusions on the high end difference, but it seems possible one (or more) of those variables could be influencing that result.
Rob will undoubtedly provide 1/4 mile data once his arrives.  |
This is great info and chart!
I appreciate all your hard work, i cant wait for mine.
Great news mine started production yesterday.
I think at 500 miles I'm going to drag it |
What mods are you planning?