Mr. Gasket 8703 Hot Rod Calculator User Manual

Page 26

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Calculating adi and density altitude Using elevation

For this example, you are at Top Gun Raceway in Fallon, nev.,

and only have access to air temperature and humidity data.

However, you know the track’s Elevation is about 3,963 feet

above sea level. With these three variables — Air Temperature,

humidity and Elevation — you can still calculate ADI and

Density Altitude. The current weather conditions are posted as

51° F and 5% relative humidity at 9 a.m.
Calculate the Air Density Index (ADI) and Density Altitude.

KeysTroKe

disPlay

1. Clear all stored values and enter track Elevation:



(Clear All)

all Cleared



eleV 3963.

2. Enter current local measured weather conditions:



TeMP 51. °f



rH% 5.

3. Calculate ADI and Density Altitude:



eleV 3963.



adi 87.969



d-alT 4323.207

Calculating adi Using a fuel Correction index

For this example, the current local measured weather conditions

are 80° F, absolute Pressure of 29.15 inHg, and 53.5% relative

humidity. your race car ran best, under these baseline condi-

tions, with #78 jets.

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3/3/2010 3:03:58 PM