Promaster Ignition Coil

• The fastest rise time and peak spark duration current of any CD designed coil.
• Designed for optimum performance when used with Mallory® Hyfire V, VII, and X electronic ignition controls or equivalent.
• Effective to approximately 12,000 RPM when used with Hyfire® VII Ignition Control.
• Glass-filled polyester case and oil-filled construction assures long life and no energy loss from arcing
• Better wire retention with spark plug type secondary post connector
• Brass contact terminals

Primary Resistance	0.1 Ohms
Secondary Resistance	0.325k Ohms
Maximum Voltage	64,000 volts
Inductance	0.7 mH
Turns Ratio	117:1
Peak Current	1,500 mA
Spark Duration	300 uS

• mH = millihenry: (A unit of inductance equal to one thousandth (10³) of a henry. A unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second.)
• mA = milliamp or milliampere: (1/1000 of an ampere. An ampere is the basic unit for measuring electrical current.)

 

ANSWER: When you select an ignition coil, you do so to meet the needs of the application. You consider the other components being used, the operating RPM, type of use if it is street or a particular type of racing. Buying the most expensive, highest rated coil is NOT always the best coil for your application. Certainly there is much demanded of the coil, but if the coil is not properly matched you can and will actually lose performance and horsepower. This #MAL-28880 ignition coil is designed specifically for the Mallory Hyfire VII CD ignition units. The demands these units exert upon the coil is extreme, and this coil does the job it is asked. Using less of a coil (improperly rated) will cause lost performance and coil damage. Also, using this coil on lower end ignition the coil will never be properly charged, thus reducing the actual voltage output.

ANSWER: Quick answer equals NO. This is a great question, and most car magazines and advertisements all boast bazillion (overstated) volt ratings for their ignition coils as a way to claim their coil is best for you. Well, I'm pleased to tell you ... those claims are all snake oil BS used to confuse the consumer. It is a proven fact that if you were to look at an oscilloscope connected to your ignition system you will see EXACTLY what each cylinder, on each firing cycle, of your engine needs to ignite the air/fuel mixture. You need to think of these "stated coil ratings" as a maximum the coil can deliver, NOT what it is going to deliver on your application. A typical engine actually requires less than 20K volts per firing cycle.

 

Uh Oh, now I just created another question I'll have to answer. You now ask, "If all I need is 20,000 volts, why am I spending all this money on high end, high output ignition components?" Trying not to get too technical, it is because though only needing less than 20k volts, it is getting it there, and making sure it gets there quickly, on-time, and efficiently that is most important than the rated "max" output. Higher output engines, higher RPM demands, extreme cylinder pressures, varying engine load and atmospheric conditions all affect engine spark demand. If you do not have enough capacity, push, consistency, energy, you will NOT even meet that 20k figure on each firing cycle. Plus, one of the main benefits of aftermarket ignition amplifier units like the Mallory Hyfire is the 20° of spark duration per firing event, no matter the RPM. This 20 degrees of spark duration ensures a complete burn on each firing cycle. This 20° works the coil even harder. If you cannot properly supply the necessary voltage, the cylinder(s) will misfire, thus the demand for the performance-oriented ignition components. It takes more secondary voltage in performance applications to compensate for higher RPM (faster firing cycles), extreme cylinder pressures (high compression, high dome pistons, larger camshafts, superchargers, turbochargers, nitrous), and other issues that effect how the spark energy gets to the spark plug and creates the necessary spark kernel to ignite and completely burn the air/fuel charge. All of this means you NEED the extra secondary voltage output an amplifier unit provides, which means you need a coil matched to handle what the amplifier tells the coil to provide.

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