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Author Topic: DO I HAVE TO USE A RESISTOR TO INSTALL THE STANDARD 240Z TACHO?  (Read 2531 times)

Offline Timwell

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Re: DO I HAVE TO USE A RESISTOR TO INSTALL THE STANDARD 240Z TACHO?
« Reply #15 on: March 18, 2010, 08:16:38 PM »
isn't the ballast resister only used to stop over voltage of the ignition circuit when cranking the engine?
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Offline stevo_gj

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Re: DO I HAVE TO USE A RESISTOR TO INSTALL THE STANDARD 240Z TACHO?
« Reply #16 on: March 18, 2010, 08:53:50 PM »
Quote from: Timwell on March 18, 2010, 08:16:38 PM
isn't the ballast resister only used to stop over voltage of the ignition circuit when cranking the engine?

Pretty sure its the other way around. The ballast resistor is bypassed only when starting the engine, but is in use the rest of the time to prevent the points getting worn.
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Offline Zedman240

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Re: DO I HAVE TO USE A RESISTOR TO INSTALL THE STANDARD 240Z TACHO?
« Reply #17 on: March 19, 2010, 06:04:15 AM »
When cranking the engine, coil gets a full 12V (stonger spark to help start), while running coil only runs on approx 9V like Steve said to prevent point meltdown.
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