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altitude and tunning

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Old 06-13-2006, 01:05 AM
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Default altitude and tunning

We are just returning from a trip to Coral Pink sand dunes in utah, elavation at 6500 feet. Are sand rails were tuned at dam near sea level, my wide band dfi gen 7 was not even able to correct for the altitude. Had to break out the lap top and strat tunning, my question is how much hp do you loose for every 1000 feet in altitude.
Old 06-13-2006, 08:33 AM
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I'd guess about 3~4% of your HP is lost at each 1000-foot interval. That's why lightly modded f-bodies will run 13.8-14.0 at 5,000+ ft.

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Old 06-13-2006, 11:03 AM
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my dyno correction at 5600 ft is 1.24. so looks like I am only get 76% of my power up here.. yuck.
Old 06-13-2006, 11:24 AM
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I was pretty close.... 4%*5.6=22.4%
Old 06-13-2006, 12:52 PM
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yeah you were just wanted to verify your numbers with mine.. . the air sucks up here. . .thats why I took my car back to cincy,oh.
Old 06-13-2006, 01:05 PM
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No, I meant I surprised myself with how close I was.... lol




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