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      07-26-2008, 02:15 PM   #106
lucid
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Drives: E30 M3; Expedition
Join Date: Apr 2007
Location: USA

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Quote:
Originally Posted by BMW-M-Mexico View Post
That makes total sense to me, we are in Mexico City at an altitude of about 2,300 meters above sea level (8,000 feet more or less). I presume this is why there is such a large loss factor, yes? This is also where the car was dynoed. Thanks for the numbers Lucid.
Thanks for the clarification. I assumed you were at sea level, but I should have asked since I don't know where the test was done, so the numbers I posted are off then. The adjusted numbers should actually be higher than what was measured during your dyno run, but when I use 7500 feet, the correction factor goes all the way up to 1.33, which can't be the case really (your car can't be putting down that much power in stock form). I assumed the 1024 mb pressure figure you posted is barometric pressure, and not absolute pressure. If it is absolute pressure, then I am using the wrong number.

This is the calculator I am using:
http://www.csgnetwork.com/relhumhpcalc.html

Another explanation is that the reported numbers are already corrected for the test conditions. If that's the case, just ignore the corrected numbers I posted.
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