Compatible Ignition Coils, Ballast Resistors, Hot-Spark Electronic Ignition

8/20/2019 Compatible Ignition Coils, Ballast Resistors, Hot-Spark Electronic Ignition

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Compatible Coils for Use with HotSpark ® Ignition

Applies to Hot-Spark 3-Series (red) ignition kits

Coil Warning: DO NOT use a low-resistance or an HEI-style coil. Use a coil that hasresistance in the primary circuit of at least 3.0 Ohms (Ω). Using a coil with

insufficient primary resistance can cause the ignition module to overheat and

misfire until it cools down again, or fail prematurely, which will void the Hot-Spark

ignition warranty.

14.0 Volts Maximum Charging System Voltage: Charging system voltage, measured

at the coil's + terminal, must never exceed 14.0 volts at any RPM level. To lessen

the impact of over-voltage and voltage surges to the ignition module, a 1.4 Ohm

ballast resistor can be wired between the coil's + terminal and the RED HotSparkignition wire. Otherwise, too much voltage/amperage can damage the ignition

module.

DO NOT reverse the polarity of the RED and BLACK wires - it will destroy the

ignition module (and void its warranty)! The Hot-Spark module’s red wire connects

to positive ( + or 15 on Bosch coil). The black wire connects to negative ( - or 1 on

Bosch coil). Remove the condenser and its wire from vehicle. All other wires areconnected to the coil in their original places. This module is designed for 12V

negative ground applications only.

Make sure that the ignition wires have plenty of slack inside the distributor and are

not rubbing on any moving parts. If you need to extend the length of the ignitionwires, use 18- or 20-gauge (AWG) wire. Crimp tightly or solder (best) and insulate

all connections.

http://www.hot-spark.com/1-HS14BR.htm



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Compatible Coils

The BERU Germany Blue Coil has 3.3 Ω primary resistance. Ideal for use with HotSpark

ignition kits.

The following 12-volt Bosch®

coils should be compatible with the Hot-Spark electronicignition module (4-cylinder):

00 0150 221 119 021 (Bosch Black coil)

0 221 119 020 (Bosch Black coil) (VW 022 905 115C)

0 221 119 027 (Bosch Blue coil) (VW 043 905 115C)9 220 081 039 (Brazil)

9 220 081 054 (Brazil)

9 220 081 083 (00 012) (Bosch Blue coil)

0 439 051 15C (00012) (Bosch Silver Coil)

The Bosch coils above should have a primary winding with 3.0 to 3.3 Ω resistance. Bosch

coils are made in a number of countries, with varying amounts of primary and secondaryresistance. It's best to check the coil's primary resistance with an Ohmmeter (a digital multi

meter in the 200 Ω mode). Install a 1.4 Ω or so external ballast resistor (HS14BR ) between

the ignition switch (+12-Volt power source) and the coil's + terminal, if the coil's primaryresistance is questionable or borderline.

Bosch 0 221 119 030 (Bosch Red Coil, Brazil) 1.6 Ω to 1.8 Ω primary resistance (OK for 6- or

8-cylinder ignition kits, not enough primary resistance for 4-cylinder ignition kits).

BERU Germany Blue Coil: 3.3 Ω primary resistance

Lucas® Coil Primary Resistance:

DLB105 3.0 Ω (oil-filled)

http://www.hot-spark.com/1-Beru-ZS-172.htm







DLB101 3.0 Ω (oil-filled)

Flame-Thrower® (made in China) Coil Primary Resistance:

40501 3.0 Ω (oil-filled)

40511 3.0 Ω (oil-filled)40611 3.0 Ω (epoxy-filled)

Do not use any other Flame-Thrower® coil, as it won't have enough primary resistance,allowing too much amperage to flow to the ignition module, destroying the module or

shortening its life.

Inexpensive Coils:

Duralast® (Autozone) LU800 3.3 Ω primary resistance, 8.3K Ω secondary resistance (oil-

filled)

Wells® LU800 3.3 Ω primary resistance, 8.3K Ω secondary resistance (oil-filled)Import Direct 23-0254 3.2 Ω primary resistance, secondary resistance: 7.8K Ω

Measuring Coil Primary Resistance: Coil must have a minimum of 3.0 Ohms primaryresistance. To measure primary resistance: Label and remove all wires to coil ( + or - ).

Using a common digital multimeter in the 200 Ω mode, cross the red and black leads of theOhmmeter. Allow a few seconds for the reading to settle and write down the reading.

Still in the 200 Ohm mode, measure between coil’s + and - terminals. Allow a few seconds

for the reading to settle, until it stabilizes. Subtract the previous reading, taken with the

leads crossed, to compensate for multimeter’s inherent resistance. Do not use a low-resistance coil, such as the MSD or Accel coil; they don’t have enough primary

resistance for this application. Using a coil with too little primary resistance can

cause the ignition module to overheat and misfire until it cools down again or fails,

voiding the warranty.

Measuring Coil Secondary Resistance: For best performance, coil should have 7K Ohms

primary resistance. To measure secondary resistance: Label and remove all wires to coil ( +

or - ). Using a common digital multimeter in the 20K Ω mode, place one Ohmmeter lead onthe coil's + or - terminal and the other Ohmmeter lead in the coil's center high-tension wire

socket, the socket that holds the lead from the center of the coil to the center of distributor

cap.

Check the voltage reading at the coil's + terminal, engine running, at maximum RPM at

the coil's positive terminal. If the voltage reading is more than 14.0 volts at any RPM level,

the voltage regulator likely needs replacing or a 1.4 Ohm ballast resistor should be wiredbetween the coil's + terminal and the red HotSpark ignition wire. Too much voltage can

damage the ignition module and other electronic components. The ballast resistor is usually

mounted on the firewall or directly on the coil.

If the charging system voltage, measured at the coil's positive terminal, is more than 14.0

volts at any RPM level, the voltage regulator likely needs replacing or a 1.4 Ohm ballast

resistor should be wired between the coil's + terminal and the red HotSpark ignition wire.

Too much voltage can damage the ignition module and other electronic components.Charging system voltage of 13.6 volts or so is plenty.

Ohmmeter Calibration: When the Ohmmeter’s red and black leads are connected to eachother, the reading should be 0.00 or very close to zero. If, though, for example, with bothOhmmeter leads shorted together, the reading is 0.5 Ω, you’ll need to subtract 0.5 Ω from

the reading you get when measuring the coil’s primary resistance. For example, if the coil’s

primary resistance reading is 3.5 Ω, but when the Ohmmeter leads are shorted together the




reading is 0.5 Ω, then the coil’s primary resistance is 3.0 Ω: 3.5 Ω - 0.5 Ω = 3.0 Ω. Thiscalibration procedure applies only to resistance measurements made in the 200 Ω mode of a

digital Ohmmeter.

The inherent resistance of the leads is negligible in higher Ω modes of the Ohmmeter. If

you’re using an analog Ohmmeter, touch the leads together while setting the needle on zerobefore measuring resistance.

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Compatible Ignition Coils, Ballast Resistors, Hot-Spark Electronic Ignition