Mallory Ignition 37, 38, 45, 47 User Manual
FORM 1214M (REV. K) 05/13
INSTALLATION INSTRUCTIONS
UNILITE® DISTRIBUTOR
This product is applicable to pre-1966 California and pre-1968 federally certified passenger cars. It is also
applicable to non-emission controlled trucks and similar vehicles. It is not applicable or intended for use
on any emission controlled vehicles operated on highways or roads, unless otherwise noted.
IMPORTANT
Before installing the UNILITE® Distributor, make sure that your vehicle is equipped with an ignition ballast resistor (or loom
resistance wire) in the wire between the ignition switch and the coil (+) terminal. Check a service manual for your vehicle to
locate the ignition ballast resistor (or loom resistance wire). If your vehicle is not equipped with an ignition ballast resistor,
install a Mallory Ignition Ballast Resistor Part No. 700 in the wire between the ignition switch and the coil (+) terminal. Failure to
use an ignition ballast resistor will eventually destroy the UNILITE® Ignition Module.
PARTS INCLUDED IN THIS KIT: 1 UNILITE
®
Distributor 1 Distributor Wire Harness
GENERAL INFORMATION
Advance Curve:
Most UNILITE® Distributors with part numbers that end in “01”
have 24° (crankshaft degrees) of mechanical advance (between
3,000 and 3,200 RPM). Listed below are exceptions:
CHEVY LUV .......................................... 28° AT 3,000 RPM
CHEVY VEGA ........................................ 20° AT 3,800 RPM
CHRYSLER SB V8 ................................ 20° AT 3,000 RPM
FLAT HEAD FORD V8 ........................... 16° AT 3,600 RPM
MODEL A FORD ................................... 18° AT 2,000 RPM
MODEL B FORD ................................... 14° AT 2,500 RPM
VW RABBIT, DASHER ........................... 28° AT 4,600 RPM
CHEVY V6 2.8L AND 3.1L .................... 24° AT 4,400 RPM
Ignition Coils:
The UNILITE® Ignition system works with most stock ignition coils
and aftermarket high performance ignition coils. For optimum
performance, use a Mallory PROMASTER® Coil Part No 29440 or
29625, or Mallory Chrome Electronic Ignition Coil Part No. 29216.
Spark Plug Wires:
To prevent false triggering and premature ignition failures, use
suppression type spark plug wire. We recommend spiral core
ignition wire, such as Mallory PRO SIDEWINDER® Ignition Wire.
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 performance.
Electric Welding:
Disconnect the distributor wire harness before welding on the
vehicle.
NOTE: When replacing an HEI type distributor, it may be necessary
to purchase and install distributor boots and terminals for the spark
plug wires to correctly fit the UNILITE® Distributor cap.
Part No. 668 HEI to UNILITE® Boot Terminal Kit
OLD DISTRIBUTOR REMOVAL
Step 1
Disconnect the trigger wire from the coil (-) terminal. Locate the spark
plug wire on the original distributor cap that that is used
timing. See a service manual for this location. Mark the distributor cap and
distributor housing at this spark plug wire position.
to set engine
Step 2
Turn the engine crankshaft in the direction of rotation until the timing
mark lines up with the top dead center (TDC) mark on the timing tab.
See a service manual for these locations.
Step 3
Remove the distributor cap from the distributor. Do not remove the spark
plug wires or coil wire at this time. Make sure the rotor blade points to
the mark made on the distributor housing (from Step 2). If it does not,
repeat Step 2 until the timing mark lines up (again) with the TDC mark on
the timing tab.
NOTE: Once you are finished with Step 3, DO NOT turn the crankshaft until the new distributor is installed.
Step 4
Note the direction that the rotor is pointing. If you are replacing a vacuum
advance distributor, note the direction the vacuum chamber is pointing.
Remove the distributor hold down clamp and remove the distributor from
the engine.
CAUTION: Leaving the key on without the engine running will result
in damaging the Ignition Module and the coil. If you must have the
key on unplug the distributor at the white connector first.
UNILITE® DISTRIBUTOR INSTALLATION
Step 1
Remove the distributor cap from the UNILITE® Distributor.
Step 2
Place the UNILITE® Distributor in the engine. Rotate the UNILITE®
Distributor housing in the opposite direction of rotor rotation until the
nearest slot on the rotor’s shutter wheel is aligned with the optical eye
of the UNILITE® Module. This will generally give timing close enough for
starting purposes. Put the distributor hold down clamp in place and
tighten slightly, leaving it loose enough to turn the UNILITE®
Distributor. Make a mark on the UNILITE® Distributor housing
where the rotor points.
Step 3
Install the UNILITE® Distributor cap. Remove the spark plug wire on the
original distributor cap that the engine timing is set from, and install it
onto the UNILITE® Distributor cap post above the mark on the UNILITE®
Distributor housing where the rotor had pointed. Install the remaining spark plug wires from the original distributor cap to the UNILITE®
Distributor cap in the same sequence.
MALLORY IGNITION
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1
WIRING PROCEDURE
The 3 wires coming from the UNILITE® Distributor must be connected using the distributor wire harness furnished (see Figures
1 and 2).
RED WIRE: If you use loom resistance wire, connect to the coil
(+) terminal.
If you use a ballast resistor, connect to 12 volt side
of ballast resistor.
GREEN WIRE: Connect to the coil (–) terminal.
BROWN WIRE: Connect to engine block ground. Clean away any
grease, oil and paint from the mounting surface
before the connection is made.
ADDITIONAL CONNECTIONS
Vacuum advance applications: Connect original vacuum hose to the
UNILITE® Distributor vacuum chamber. Replace hose if cracked, damaged, or if it is not long enough. If the previous distributor was not
equipped with vacuum advance, connect a vacuum hose to a ported
vacuum outlet on the carburetor.
Tachometer operation: Connect wire or wires as recommended
by the actual tachometer manufacturer.
STARTING ENGINE
CAUTION: Be sure all tools, wires and miscellaneous objects are
clear of moving engine parts and extreme heat before staring the
engine.
Step 1
Recheck all wires and connections to make sure they are correct. Check
and clean, or replace spark plugs. If replacing spark plugs, use types
recommended by the engine manufacturer.
Vacuum advance applications: Disconnect the vacuum hose to UNILITE
Distributor vacuum chamber at the carburetor and temporarily plug this
carburetor fitting.
Step 2
Connect a timing light and start the engine. If the engine fails to start,
rotate the distributor in small increments clockwise or counterclockwise
until the engine starts. Do not exceed more than ten degrees of distributor
housing rotation in either direction.
Step 3
Set timing as recommended by the engine manufacturer, then tighten
distributor hold down clamp. Check timing again. If timing has moved,
repeat Step 3.
Vacuum advance applications: Reconnect the vacuum hose between the
UNILITE® Distributor vacuum chamber and the carburetor.
®
UNILITE® WIRING DIAGRAM USING BALLAST RESISTORFIGURE 1
ALL OTHER WIRES ORIGINALLY CONNECTED
TO THE COIL (+) TERMINAL
12V/IGNITION
SWITCH
IGNITION BALLAST
DISTRIBUTOR WIRE HARNESS
PART NO. 29349
IGNITION MODULE
FEMALE CONNECTOR
ENGINE
GROUND
NOTE: The purpose of an ignition ballast resistor between the ignition switch (12V) and the ignition coil positive
terminal is to restrict current flow through the ignition coil. Failure to use an ignition ballast resistor will
eventually destroy the Ignition Module.
®
EXCEPTION: If your vehicle is equipped with a HYFIRE
control, use the wiring procedures stated in the instructions included with the ignition control.
To prevent false triggering and possible premature ignition failure, you must use suppression type (carbon
core, spiral core, or radio suppression core) spark plug wire.
DO NOT USE SOLID CORE (COPPER CORE OR STAINLESS STEEL CORE) SPARK PLUG WIRE WITH ANY ELECTRONIC
IGNITION SYSTEM.
Electronic Ignition Control or similar aftermarket ignition
BROWN
RED
GREEN
RESISTOR
-
COIL
+
2
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