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Cold tempertures

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Old Jul 21, 2007 | 07:42 PM
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From: belews creek nc
Default Cold tempertures

I was wondering if anyone knows of a way to figure out the horse power gains you get from a big out door temperture change from one day to the next. You know, like when that first of the year clold snap come through. Say seventy degrees and maybe 40 degrees.

Last edited by it's a vette; Jul 21, 2007 at 08:15 PM. Reason: I mispelled a word
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Old Jul 21, 2007 | 11:06 PM
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From: Lynnfield MA
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On a normally aspirated car, it's not that big of a difference,
maybe a handful of hp per 100. On a turbo or supercharged
car, it's HUGE because the intake charge is so much cooler
and denser that you can cram a lot more air into the cylinders
without detonation.
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Old Jul 21, 2007 | 11:09 PM
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From: Phoenix AZ
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I think they say every 10 degrees cooler intake air is roughly about 1% hp to the crank.
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Old Jul 22, 2007 | 02:39 AM
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St. Jude Donor '08
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http://wahiduddin.net/calc/calc_hp_dp.htm

Have fun

Clayton from Las Vegas
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Old Jul 22, 2007 | 11:38 AM
  #5  
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From: belews creek nc
Default room temperture

WHen auto makers rate their horse power do they have a standard room temperture that they go by?
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