Service manual

Ford 7.3 Liter Evolution
22
Rev. Limiter
The Rev. Limiter prevents the engine from over-revving and causing engine damage. If
you set this value to 2500, you would not be able to rev the engine beyond that even with
the accelerator to the floor. Setting this value higher can help take advantage of the power
generated at higher RPMs. Setting this value too high can cause damage to your engine.
Also make sure to set the Rev. Limiter at least 150 RPM higher than the highest WOT
Shift Point or you may experience erratic shifting.
Timing
Timing adjustments are available on the Evolution to help you best adjust your engine
according to modifications. Timing can also be used to help lower EGT’s, if you are
seeing high EGTs you may consider advancing the timing slightly to lower the EGTs.
WOT (Wide Open Throttle) Shifting
On automatic transmissions, these are the RPM points at which the vehicle will shift when
you are at Wide Open (full) Throttle. Raising these values helps to keep the engine in the
peak power curve after a shift.
(Hint: Raising these values may help improve 0-60 and quarter mile times.)
Standard (Std.) Shifting
On automatic transmissions, these are the MPH points at which the vehicle will want to
shift during normal acceleration. Positive values will cause later shifts while negative
values will cause shifts to occur sooner.
(Hint: Negative values may help improve fuel economy while positive values will improve performance.)
Shift Firmness
On automatic transmissions, these values represent a percentage change in shift firmness,
or in other words how “hard” your transmission will shift. A positive number will cause
the shift to be firmer. A negative number will cause it to be softer.
(Hint: Firming up the shifts may help improve 0-60 and quarter mile times.)
WOT Fueling
If you have added an exhaust and/or intake to your vehicle, often times you will need
more fuel at Wide Open Throttle. You can use this custom option to add/subtract WOT
fueling to maximize performance.