GENERAL INFORMATION

an engine speed governor. The use of the RPM limiters is not recommended

for applications equipped with a catalytic converter. Similarly, forcing engine

RPM past the RPM limiter continuously for long sustained intervals can cause

problems resulting from fuel build up in the exhaust system that may adverse-

ly affect the application.

Ignition Ballast Resistor / Loom Resistance Wire

ence of the factory ignition resistors or ignition ballast resistors in the wire

from the ignition switch. It is not necessary to install ignition ballast resistors

as specified by the instructions for the particular distributor.

Ignition Coils

Spark Plug Wires

YOU MUST USE suppression type (carbon core, spiral core) spark plug wire.

We recommend spiral core ignition wire, such as Mallory PRO SIDEWINDER

®

Ignition Wire. Suppression type spark plug wires prevent false triggering and

the possibility of premature ignition or accessory failures.

DO NOT USE solid core (copper core; stainless steel core) spark plug wire

with any electronic ignition system or accessory. Solid core spark plug

wire is one cause of electro-magnetic interference (EMI; ignition noise).

EMI is one cause of false triggering (preignition; spark scatter) and pre-

mature ignition or accessory failures.

®

IGNITION SYSTEM

Part No. 667C

4-12 Cylinder

6 Cylinder Odd-Fire

Notice: This product is legal to sell, distribute or install on vehicles in California. Executive Order D-70-6.

The HYFIRE

cations. The HYFIRE

Spark Plug Gaps

For street applications, use your engine manufacturer’s specifications. For

racing applications, start with your engine manufacturer’s specifications, then

experiment with and closely monitor various gaps to achieve maximum per-

formance.

Electric Welding

Disconnect the HYFIRE

nesses (if possible) before any welding is done on the vehicle.

External RPM Limiters

Mallory RPM Limiter Part Nos. 641-4, 641-6, 641-8, 642, 643 and 644 WILL

NOT function with the HYFIRE

Mallory PRO TACH

The tachometer and shift light will work with the HYFIRE

®

VII Ignition

Systems. However, the RPM limiter WILL NOT function with the HYFIRE

Ignition Systems. Turn the LIMIT RPM knob slightly past 11,000 to prevent

the RPM limiter from interfering with the tachometer’s other functions.

1

MOUNTING PROCEDURE

Step 1

Disconnect the battery (–) cable to cut power to the system.

Step 2

Select a convenient location to mount the HYFIRE

the unit away from hot engine components or extreme heat such as the

exhaust system and manifolds. Keep the unit away from moving devices,

such as fans, belts and linkages. The location must be dry. Moisture will dam-

age components inside the unit.

Step 3

Mounting to a flat surface with shock mounts

• Hold the unit in its mounting position and center punch the mounting pat-

tern on the mounting surface for drilling mounting holes. Drill mounting

holes using a 9/32" drill bit.

• Install the shock mounts into the bottom plate of the unit. Hold the unit in

position where it will be mounted.

• From the backside of the mounting surface, insert the washers and the

1/4-20 nylock nuts onto the shock mount studs. Tighten each nut until

snug.

FORM 1460 (REV. C) 5/00

INSTALLATION INSTRUCTIONS