Calculated Industries 8703 - Manual (Page 21)

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Pressure
There are two types of commonly referenced pressure,
Absolute Pressure and Corrected Pressure.
Absolute Pressure is the actual, ambient local pressure.
There are several tools available to help you measure
Absolute Pressure, such as altimeters, absolute
barometers, and motorsports weather stations. You do
not need to know your track’s elevation when utilizing
Absolute Pressure on your calculator.
Corrected Pressure is a measurement you might get
from the local radio station, TV station, from the Internet,
or from a “corrected” barometer. It is corrected for sea-
level and is not suitable for motorsports. Do not use
Corrected Pressure on the Hot Rod Calc.
Elapsed Time
Elapsed Time, or ET, is the amount of time in seconds
it takes a vehicle to travel from start to finish over a
measured distance, typically one quarter of a mile.
Your calculator’s ET predictions may vary from other
ET prediction sources primarily due to traction. The Hot
Rod Calc assumes ideal conditions with no tire slippage
and 100% converter lockup, and the predictions are for
estimation purposes only.