User Manual

Evolution FORD 4.6 and 5.4 Liter
17
Custom Options
When preparing to program your vehicle, you will have the option to change
certain parameters. Choosing YES when prompted to “Create a custom
program?” will load the Custom Options menu.
Custom Options are provided to allow for flexibility based on driver
preferences. Any option customization done by the user is not warranted by
Edge Products. Please use at your own discretion.
The following customizable options are available:
Gear Ratio
The Evolution has the ability to correct for modified gear ratios. Do not
change the value displayed on the Evolution unless you have changed the
rear differential gear. For 4WD vehicles, both the front and rear differential
gears should be the same.
Some reasons for changing gears ratios include:
1. To maintain the optimum ratio between the engine RPM and tire RPM.
Changing tire sizes affects this ratio. Changing the differential gear helps
to restore the proper ratio.