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1. Altitude goes up, car loses performance/altitude goes down, car gains
performance
2. 60’ times consistent, no tire slip
3. Wind affects minimal, 30 mph head or tail winds are not present
The more Good Runs and the more altitude span the more accurate your
predictions will be.
******Important******
It often takes a number of trips to the track to acquire the above-
recommended data in order to produce accurate results. Because of this,
we suggest using the following method until enough data has been
acquired.
Gasoline burning engines:
A 200’ rise in DA typically yields a 0.01sec slow down in ET and vice-
versa for a drop in DA.
Alcohol burning engines:
A 400’ rise in DA typically yields a 0.01sec slow down in ET and vice-
versa for a drop in DA.
For TS racers:
Typically the TS ratio is 3:1. This means is takes 0.03sec in the timer to
move the car 0.01sec. Use this information with the above DA change to
set up your timer.
