Quote:
Originally Posted by twobjshelbys
Mt. Washington is only about 6200', which is well within the range of a carburated system without rejetting so DFI doesn't need to work too hard. Trying it on Pikes Peak or on Trail Ridge Road is the acid test.
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Air density is more altitude sensitive than most people might at first suspect. This is a graphic representation from the engineering toolbox of the effect of altitude on air density from sea level to 10000 feet;
Using sea level as a baseline the correction factor at 5000 feet is 1/1.17 or about a 15% reduction in available air which would correspond to a 15% reduction in engine power. This would be even more apparent than the summertime blues power reduction in climates like AZ. At 5000 feet the effect is so pronounced that the drag races at the Denver Mile High facility have measurably slower speeds and higher et's than the same cars and classes at NHRA sea level or near sea level tracks.
Ed