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or different track elevations.
The program works for all length tracks and is compatible for use with either gasoline or methanol
fuel. However, a setup fuel choice must be made to get accurate ET predictions. The program
will automatically go to the fuel setup program during the first use.
The Dial-In is predicted from 1 previous reference run (no database of runs is used or required).
The reference run, on which the prediction is based, is selected by the user. The reference run
should be the most recent good full run when the vehicle performed as expected. Runs that had
tire spin, unusual 60 ft times, or gusty wind conditions should not be used for the reference run.
Change the run used as the reference (old) run as the race day progresses. It is important to use
the most recent good full run as the reference. The most recent run will best represent the current
traction and weather conditions.
This program works best when the engine fuel/air mixture is slightly rich so the vehicle
performance will change appropriately with the weather changes. This may require periodic jet
changes during the race season. The benefits gained in consistency and predictability are well
worth the effort. If the vehicle runs quicker than the computer is predicting when the correction
factor is improving (number getting smaller) then the fuel/air mixture is probably too rich and
should be leaned slightly. Conversely, if the vehicle will not run as quick as the computer is
predicting when the correction factor is improving then the fuel/air mixture is probably too lean
and should be richened slightly. Efforts spent on getting the fuel/air mixture correct will be well
worth the rewards in increased predictability. See the Tune-Up Information section for more
details.
Press the SAMPLE key and allow the weather analyzer to stabilize on the = Sampled Wthr =
screen. Press DIAL-IN then Standard to start this program.
Fuel Display Example:
== Fuel Setup ==
Fuel = Methanol (Press down arrow to change fuel, then ENTER)
Done. (Press CLEAR to return to program)
Std Dial-In Display Example:
==Std. Dial-In == (Press ALT, SET-UP, 1, 1 to change fuel)
Fuel = Methanol (Fuel selected)
Old Corr? 0.9887 (Enter reference run correction factor)
Old ET? 8.829 (Enter reference run ET)
New Corr? 0.9792 (Auto transferred new correction factor)
New ET= 8.812 (Predicted new ET - recommend subtracting 0.003
from prediction for Dial-In of 8.80)
Dial-In, Density Altitude Method.
This program is designed to help class and bracket racers predict an elapsed time (ET) for the
next run based on changes in the density altitude. This program requires that the Dens Alt Setup
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