PerTronix Flame-Thrower Cast Distributors D174510 - Manual (Page 2)

POWER & GROUND TESTS
It is imperative that the power and grounds be checked as part of the installation
procedure. After installing the Ignitor module and the distributor and with the
distributor in the engine, use a digital multi-meter to measure the resistance from
the aluminum plate holding the module to battery (-), the net resistance must be
less than 0.2 ohms. (Set meter to lowest ohms setting). The net resistance is the
meter reading minus the resistance of the meter leads. If the net resistance is
greater than 0.2 ohms, the source of the faulty ground must be found and fixed.
Usually the source of the bad ground is easily found by holding one probe on an
original location and moving the second probe toward the static probe. Where the
resistance drops identifies the source.
Maximum resistance from Ignitor plate to battery negative terminal. 0.2 ohms
EXAMPLE:
Resistance from Ignitor plate to battery negative (-) terminal.
0.4 ohms
Resistance of meter leads 0.2 ohms
After subtracting meter lead resistance, your net resistance is: 0.2 ohms
VOLTAGE TEST
1. (Do not disconnect wires from Ignition coil). Place ignition switch in the “off” posi-
tion.
2. Connect a jumper wire from negative (-) terminal of the coil to a good engine
ground.
3.Connect the voltmeter red lead to the positive (+) terminal of the coil and the black
lead to a good engine ground.
4.Turn the ignition switch to the “on” position and note voltage reading on the voltme-
ter. Quickly read the voltage and turn ignition “OFF”. Leaving ignition “ON” for an
extended period could result in permanent damage to the Ignitor.
5. SEE CHART BELOW FOR SPECIFICATIONS.
Note: Low voltage can be caused by poor connections, poor contacts in the
ignition switch, ballast resistor, and or a resistance wire in the wiring harness
(Factory Installed).
Minimum Maximum
Ignition Switch “ON” 8.0V N/A
Cranking 8.0V N/A
Engine Running N/A 16.0V
WIRING
The Flame-Thrower distributor can be used in conjunction with most
Ignition coils rated at 0.45 ohms or greater. For optimum perfor mance
purchase and install a 0.6 ohm Flame-Thrower II coil or 0.45 ohm HV high
performance coil.
1. Determine the proper wire length, and attach the provided termi-
nals. (Use a designated wire crimping tool to achieve an
adequate connection)
2. Attach the Red wire to the coil positive terminal or a 12-volt igni-
tion source. Note: Original ignition wire must be connected to the
(+) positive side of the Ignition coil.
3. Attach the Black wire to the coil negative terminal.
4. Check to insure correct polarity and that all connections are tight.
5. Reconnect the battery negative cable.
FINAL ADJUSTMENTS
1. Plug vacuum port to vacuum advance canister before setting initial
timing.
2. Start the engine and set the initial timing.
3. Tighten the distributor hold down clamp.
4. Connect the vacuum hose to the vacuum advance canister.
3. Turn the shaft so that when the distributor is placed into the engine,
the rotor position matches that of the original distributor. As the
distributor drops down, the rotor will turn slightly as it engages
with the camshaft gear. Adjust for this rotation by turning the rotor
a few degrees prior to the gear engagement. Several attempts
may be necessary to achieve the proper rotor position. Note:
The distributor flange will be flush with the engine block if the
installation is done properly.
4. Place the distributor cap onto the housing.
5. Turn the housing so that the terminal, that represents the first
cylinder in the firing order, lines up with the rotor.
6. Install the distributor hold down clamp and tighten the hold down
bolt slightly.
7. Install new distributor cap. Transfer the spark plug wires from
the original cap to the new cap one by one to insure their proper
location. Note:
WARNING!!! DO NOT USE WITH SOLID CORE SPARK PLUG
WIRES OR COIL WIRE.
Vacuum advance:
Locate the vacuum hose that was previously attached to the
vacuum advance canister. Some applications have vacuum
advance hoses attached to a manifold vacuum source, due to the
performance advance curve, we recommend that you relocate
this hose to a ported vacuum source. After setting initial timing the
hose will be unplugged and attached to the vacuum advance on
the distributor.