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Subject I have done some research and Woody has gone as
     
Posted by colocomp (Denver) on February 27, 2006 at 9:40 AM
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In Reply To Results from Sat's Dyno Day at Denver posted by chenc544 on February 27, 2006 at 08:59 AM
     
Message far as calling Dyno-jet.

You will have a disparity if you compare an NA car and a forced induction car at any elevation or both(NA/FI) cars at the same elevation.

A turbo car in Arizona will read close to a turbo running similar setup (boost, turbos etc.) car in Denver on the SAE scale or from sea level for that matter. Anytime the scale is used FI cars have an advantage in overcoming the atmospheric conditions. So at 5 feet, 1000feet or 5500 feet the results for fi are slightly inflated compared to NA, but not when comparing to other similar FI cars at different elevations. Even at sea-level with a .10 correction the FI cars numbers are slightly inflated, the FI is changing the volume of air. The scale was designed for naturally aspirated cars, you run into other factors like compressor efficiency, boost levels, water injection, etc, etc, so there is no way to have a accurate forced induction SAE scale that is reduced compared to the NA scale.

At higher elevations the margin for error does increase though, so there is a chance that the numbers will be skewed by 1-3% + or - on like FI cars.

     
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