[ds968]

Is there a scale which shows approx. how much the power ( - / + % ) typically fluctuates in any given car with changes in 1) altitude and in 2) temperature ?

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[flash]

on a normally aspirated car:



for altitude, it is:

(HP X Altitude [in feet] / 1,000 X 0.03 - HP)



for temp it is:

square root of 288.15 divided by temp Kelvin, then multiplied by horsepower

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[94SilverCab]

Flash, could you be a little more exact? <img src="/forum/images/smilies/968/glare.gif" class="smilie" alt="" />



Jay

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[ds968]

thanks.



p.s. gotta go now, i'm building a track inside a tunnel on the ocean floor <img src="/forum/images/smilies/968/tongue.png" class="smilie" alt="" />

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[Rap]

How about an sc car?

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[flash]

that depends largely on the boost, but also on the heat.



previous result divided by (14.7 + boost / 14.7) should get you pretty close.

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[ds968]

Oh sure, those are all the easy formulas :-) :-) . Now, how does one calculate the impact to the power from various combinations of altitude and temperature ? And once you figure out that algorithm, post it in an intersecting lines graph form please.. :-) :-) .

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[94SilverCab]

We should have a Flash's Puzzler of the Week...



Jay

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