AADRLAmerican Drag Racing League

2008-10-23T13:58:01-04:00CCIDCubic Inch Diameter

2008-11-04T16:05:01-05:00DDADensity Altitude

Density Altitude is a number that is calculated using the temperature, barometer and humidity to determine the quality of the air. The numbers are meant to be compared to how the quality of air would be at sea-level on an average day. So on a day where there was 0% humidity, 60 degree temperature and a barometer of 29.92 - the Density Altitude is 1 ft. That means that the air quality is equivalent to a 60 degree day at sea level with an average barometer. As the barometer goes down (as it would with increased elevation) the DA goes up. If the temperature or humidity go up, the DA goes up. Rising DA values represent worsening air quality. If the barometer rises and the temperature and/or humidity are cool, the DA will descend and could go negative so you have a very high quality air. Lower humidity means there is more room for oxygen (which is valuable for and notable for naturally aspirated vehicles) which makes more horsepower.

2012-03-21T10:33:01-04:00DDynoDynamometer

A machine used to measure torque, rotational speed and horsepower

2008-11-07T13:40:01-05:00EEGTExhaust Gas Temperature

2008-10-25T16:53:01-04:00EETElapsed Time

2008-10-23T14:41:01-04:00HHeads-upBoth cars leave the starting line at the same time, and the quickest vehicle to the finish line is the winner

2008-10-31T10:55:01-04:00IIHRAInternational Hot Rod Association

2008-10-23T14:05:01-04:00MMOVMargin Of Victory

Margin of victory can be calculated as "Time" which usually appears at the bottom of a time slip. But it can also be calculated as a distance. If you want to know how many feet ahead (or behind) you were as you crossed the finish line, multiply the number on the timeslip * Winner's MPH * 1.4666

2008-10-23T14:29:01-04:00MMPHMiles Per Hour

2008-10-24T16:17:01-04:00NNHRANational Hot Rod Association

2008-10-23T14:05:01-04:00PPositractionChevrolet's name for Limited Slip Differential

• Wikipedia
• Differentials: Identification, Restoration & Repair

2009-06-09T14:33:01-04:00RRaila long bodied car often referred to as a dragster

2008-10-24T18:19:01-04:00RRPMRevolutions Per Minute

2008-10-23T14:30:01-04:00VVPVapor Pressure

Vapor Pressure values are typically 1.0 and less. If you use this information with each of the runs of your naturally aspirated motor, you will probably see a correlation with performance. Vapor in the air has a negative effect on the combustion process and therefore hinders performance. This is often used to help understand when performance degrades as well as for tuning and jetting.

2012-03-21T11:04:01-04:00