User Manual

THE TIMING COMPUTER – AN OVERVIEW
our new ACCEL TIMING COMPUTER controls the signals that tell your ignition when to fire.
must be installed between your triggering device (distributor pickup, crank or magnetic
igger, etc.) and your ignition module.
our A
CCEL TIMING COMPUTER also has two
dditional inputs to further adjust timing
alues (from a MAP Sensor and a Nitrous
olenoid). It outputs timing values to your
CCEL+ ignition. It can also output, through
wo internally switched connectors, to two
PM-activated devices (either a Shift Light,
2O solenoid, or even an Air Shifter).
While the A
CCEL TIMING COMPUTER is not a complicated device, installation requires some
pecific knowledge. You will be better prepared for its initial and future configuration if
ou read this manual before installation and keep some important details in mind.
• Use caution when selecting values. Make small changes and then evaluate their effect.
• The rev-limit set in your A
CCEL+ ignition module is your engine’s maximum rev-limit.
Be sure it fits your engines needs and the needs of any additional control modules.
• Disconnect Nitrous, during installation and configuration.
• The A
CCEL TIMING
COMPUTER causes a small fixed timing retard in the trigger, due
to computational delay. Engine timing
MUST be adjusted during and after installation.
• The Timing Computer has three operating modes: Programming Mode, Control Mode, and
Diagnostics. Programming and Control modes overlap (ignition control is performed
while the Timing Computer is in Programming Mode).
Diagnostics Mode see Pg 17.
• It may take a few seconds for the Timing Computer to store saved values. Be sure
the LED display stabilizes, to show your current engine timing, before turning the
module off. Powering off during a save operation may corrupt the unit’s memory.
ADJUSTING AND STORING VALUES
The SAVE button tells the A
CCEL TIMING C
OMPUTER to store all newly adjusted values.
They will be remembered, until they have been re-pro-
grammed and then over-written with the
SAVE button.
You can adjust, and test, but not store values by turning
your
TIMING COMPUTER off, without pressing SAVE.
The
LED’s will display the current timing curve, or the
RPM of whatever function you are adjusting.