Mallory Ignition ACCEL POWER PROCESSOR 79100 - Manual (Page 11)

Power Processor
11
11. Tire REVS/Mile: If you have installed tires with a larger Outer Diameter that
is different than the original factory tires. This feature will allow you to adjust your
speedometer and part-throttle shifting (for automatic transmissions) for the new
tire O/D Size. Measure the Outer Diameter/Circumference or your tire, then
input the size, 1788MM to 3218MM (Note: to convert inches to MM,
Multiply inches by 25.4. Example: 88 inches OD X 25.4 = 2235 MM).
12. High Speed Limiter: If you have installed factory-approved high-Speed
rated performance tires, you can change your vehicle’s top-speed limiter to match
the speed rating of those tires. MPH Limit selections are 60 to 125 or select
OFF to Disable Limiter.
• The speed rating or speed symbol will be found on the sidewall of your tires.
Here are the corresponding symbols and maximum top speed limits
depending on model:
S – 110 MPH
T – 116 MPH
H – 128 MPH
V – 147 MPH
Z – 255 MPH
(Remember that tire speed rating is not the only factor you should
consider when changing your factory speed limit setting, you also need to
consider how stable your vehicle is at the speed you choose).
13. REV Limit in Drive: To keep the stock engine rev limit, go to next step. To
adjust the engine rev limit to a value other than stock. Select from 5100 to
8000 RPM. The stock rev limit may vary depending on year and engine size of the
vehicle. The Stock REV limit will always be the one seen in the screen first; you
can either raise it or lower it.
• If your vehicle has an automatic transmission and you are changing your RPM
“rev” limiter, you must also adjust your shift points accordingly (See shift point
chart section #19) Failure to do so may result in damage to your engine or
powertrain. (Note: remember not to exceed engine valve train capabilities).
14. REV Limit in Neutral: To keep the stock engine neutral rev limit, go to next
step. To adjust the engine neutral rev limit to a value other than stock. Select
from 2500 to 7500 RPM. The stock rev limit may vary depending on year and
engine size of the vehicle. The Stock REV limit will always be the one seen in the
screen first; you can either raise it or lower it. This feature is used to prevent
engine damage mainly in situations, were you accidentally step on the accelerator
pedal while the vehicle is in park or neutral, or if you accidentally to go from drive
to neutral (Miss shift) while accelerating.