Mallory Ignition Mallory HYFIRE VII Series Electronic Ignition Controls 667S - Manual (Page 5)

HYFIRE ® VII S TOP PANEL CONTROLS
Basic Operation
The top panel has a three-digit LED display, three LED indicators, and three
switches. The switches are used to set the mode and mode values, and the 3
separate LEDs indicate the mode. The four modes are listed below:
RPML LED
Main RPML (normally used as an engine protection RPM limit)
This value is valid as long as another RPM limit has not been selected. The range
is 1000 to 12800 RPM, in 100 RPM steps.
“AUX” LED
Aux RPML2 (normally used as a launching RPM control)
This value, if selected, overrides the main RPML. Range is 1000 to 12800 RPM,
in 100 RPM steps.
“RET” LED
HS RETARD1
This is a high-speed retard function which will retard the engine timing when
selected. The range is 1 to 15 degrees in .1 degree steps.
ALL MODE LEDs BLANK
CYLINDER NUMBER
This function allows you to select the engine cylinder number from 4 to 12 cyl-
inders.
Setting Mode and Values
To adjust one of the modes, press the "MODE" switch until the proper mode LED
is lit (or none are lit, if you're selecting the cylinder mode ), then use the arrow
keys to increase or decrease the value. If you go past one end of the mode range,
the display will start over at the other end. For example, if you continue to
increase the RPML value past 12,800, the display will start over at 1000 RPM.
Start Retard
The HYFIRE ® VIIS has a feature shared with the HYFIRE ® VIIC: a built-in
automatic start retard. This automatically retards the engine timing below 500
RPM. The retard increases to 20 degrees at 100 RPM. Below 100 RPM, the
retard is fixed at 30 milliseconds, and above 500 RPM there is no automatic
retard.
Activation Plug
Although the activation plug has 8 contacts, only two are used on the
HYFIRE ® VIIS: RPML2 for the Aux RPML, and HSRET 1 for the High-Speed
Retard function. If you add the optional HYFIRE ® VIIC External Control Part No.
674, all other functions except the RPM switch relay contacts are available. The
plug has clamp-type terminals that will accept up to 14 gauge wire (stranded is
preferred, but solid will work). Insert the wire into the clamp, then tighten the
screw to hold the wire in place. The plug also has screws at each end to firmly
fasten to the socket on the HYFIRE ® VIIS circuit board. Do not overtighten these
screws. Each RPML or Retard function requires 12 volts to activate. Typical
methods are clutch switch, trans brake switch, nitrous solenoid, or similar.
RET2 RET3
DOWN
UP
R R
PERFORMANCE CD IGNITION SYSTEM PERFORMANCE CD IGNITION SYSTEM
PART NO. 667S
R R
MODE
RET1 RPM3 RPM2
RET
AUX
RPML
NC
C
NO
RPM2
*RPM3
RET1
*RET2
*RET3
NOT USED ON HYFIRE ® VIIS
+12 VOLTS TO ACTIVATE
+12 VOLTS TO ACTIVATE
*Only used when optional
PN674 is connected.
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