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driving in thin air
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http://www.clubcobra.com/forums/small-block-talk/70905-driving-thin-air.html)
| sharpei1421 |
07-04-2006 04:11 PM |
driving in thin air
I live in the mountains of Colorado at ~ 7500 ft. Needless to say, my engine is running very rich. I need to change the jets on the carburator, but do not know how much smaller to go. Any suggestions would be appreciated.
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"Holley carbs are calibrated for sea level operation and an inlet air temperature of 70 degrees Fahrenheit. Once you know the correct stock jetting for your particular Holley carb, you can determine whether you live or race at an altitude above sea level. For every 2000 foot increase in altitude, you can reduce the jet size by one size. If you had a carb which has a stock jet size of 80 and you live or race at 2000 feet above sea level, then you would use a #79 Holley jet in the carb. "
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