1
MALLORY TECHNICAL SUPPORT
(775) 882-6600
®
HYFIRE
®
VI
A
SERIES
ELECTRONIC IGNITION CONTROL
PART NO. 6852M
INSTALLATION INSTRUCTIONS
FORM 1522 (REV. B) 03/01
GENERAL INFORMATION
Battery
The HYFIRE
®
VIA Series Ignition Control operates on any negative
ground, 12 volt electrical system with a distributor. It will also work
with 16 volt batteries and can withstand a momentary spike of 24 volts
in case of jump starts. This system delivers full voltage with a supply
of 10-18 volts, and operates with a supply voltage as low as 8 volts.
If your application does not use an alternator, allow at least 15 amp/
hour for every half hour of operation. If you crank the engine with the
same battery or other accessories, such as an electric fuel or water
pump, increase the amp/hour rating
Coils
For optimum performance with your HYFIRE
®
VIA Ignition Control, we
recommend Mallorys PROMASTER
®
Coil P/N 29440. Mallorys
PROMASTER
®
Coil P/N 29625 can also be used, as well as most
stock coils or aftermarket coils designed as stock replacements.
NOTE: Do not use Mallorys PROMASTER
®
Coil P/N 28880.
Tachometers
The yellow wire on the HYFIRE
®
VIA Ignition Control provides a trig-
ger signal for tachometers, shift lights, or other add-on RPM activated
devices. This wire produces a 12 volts square wave signal with a 20%
duty cycle.
Some vehicles with factory tachometers may require a tach adapter
to work with the HYFIRE
®
VIA Ignition Control. If your GM vehicle
uses an inline filter, it may cause the tach to drop to zero on accelera-
tion. If this occurs, bypass the filter. For more information on tachom-
eters, see page 4.
Foreign Vehicles
Because of modern fuel injection systems, some foreign vehicles may
require a tachometer/fuel injection adapter to work with the HYFIRE
®
VIA Ignition Control.
NOTE: Do not install the HYFIRE
®
VIA Ignition Control in any
vehicle that is originally equipped with a CD ignition control.
Spark Plugs and Wires
High quality, spiral wound wire and proper routing are essential to the
operation of the HYFIRE
®
VIA Ignition Control. This type of wire pro-
vides a good path for the spark to follow while minimizing electromag-
netic interference (EMI).
NOTE: Do not use solid core spark plug wires with the HYFIRE
®
VIA Ignition Control.
Routing
Wires should be routed away from sharp edges, moving objects, and
heat sources. Wires that are next to each other in the engines firing
order should be separated. For example, in a Chevy V8 with a firing
order of 1-8-4-3-6-5-7-2, the #5 and #7 cylinders are positioned next
to each other on the engine as well as in the firing order. Voltage from
the #5 wire could jump to the #7 wire. This could cause detonation
and engine damage.
For added protection against cross-fire, Mallory offers PRO SHIELD
insulated sleeving. PRO SHIELD is a glass woven, silicone coated
protective sleeve that slides over your plug wires. It also helps reduce
damage from heat and sharp objects.
Spark Plugs
Using the correct spark plug and heat range is important for optimum
performance. Because there are so many variables to consider, we
suggest starting with your engine manufacturers spark plug recom-
mendation. From there, you can experiment with small changes in
plug gap and heat range to obtain the best performance from your
engine. Use the chart at right as a starting point. We also recommend
non-resistor spark plugs.
1 HYFIRE
®
VIA Ignition Control
4 #10 Sheet Metal Screws
2 Wire Ties
2 Ring Terminals, Insulated
1 1-amp/100 volt Diode
2 1/4" Tab Terminals
5 1/4" Male Disconnects
5 1/4" Female Disconnects
1 Rubber Grommet
2 Cable Clamps
1 Magnetic Pickup Extension
PARTS INCLUDED: