GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Altitude and performance

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Old Mar 8, 2005 | 10:03 AM
  #1  
RDSox04's Avatar
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Hey folks, just wondering how much power I have lost driving my baby at 5000ft. Is there a general rule like a certain percentage per 1000ft? Thanks

Adam
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Old Mar 8, 2005 | 10:14 AM
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Adam

Not sure of the formula. But when I have raced at the Mt. Washington Hill Climb you can really feel a huge power lose once you get above the tree line.

You also hug the mountain when your that high up, because the other side is just air.
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Old Mar 8, 2005 | 10:49 AM
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Originally posted by RDSox04@March 8, 2005, 12:06 PM
Hey folks, just wondering how much power I have lost driving my baby at 5000ft. Is there a general rule like a certain percentage per 1000ft? Thanks

Adam
Looks like 17-20% roughly. I've attached the nerd stuff.

SAE J1349
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Old Mar 8, 2005 | 11:48 AM
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If you are interested in how your car would perform at altitude, this webpage will tell you the NHRA altitude correction factors. Go to the Stock and Superstock matrix at the bottom.

The Boss Hog
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Old Mar 8, 2005 | 03:34 PM
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Originally posted by MJC302+March 8, 2005, 12:52 PM--><div class='quotetop'>QUOTE(MJC302 @ March 8, 2005, 12:52 PM)</div><div class='quotemain'><!--QuoteBegin-RDSox04@March 8, 2005, 12:06 PM
Hey folks, just wondering how much power I have lost driving my baby at 5000ft. Is there a general rule like a certain percentage per 1000ft? Thanks

Adam
Looks like 17-20% roughly. I've attached the nerd stuff.

SAE J1349
[/b][/quote]

Franco...once on the site choose 'Dyno Correction Factor' on the left side margin..then choose 'Engine tuner's Calc' in the body of that writeup and put in the standard 77F and 29.235 "Hg for pressure and punch in your altitude and dewpoint. Fiddle with the dew to obtain the correct RH. My apologies for not showing the direct calc, I just assume everyone likes to read the stuff. :scratch:
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