 Ballast resistor, Yes or no |
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| 80cap |
 Jan 29 2017, 11:38 AM
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#1
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Member  Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None  |
While trying to install my wire mess I found a ballast resistor. Did a 914 use them ?
I am not running breaker points. Brian (IMG:style_emoticons/default/screwy.gif) |
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| iankarr |
Jan 29 2017, 11:59 AM
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#2
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,473 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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The ballast resistor is usually necessary (depending upon your ignition setup), but often built in to the coil. On my car with an electronic ignition module I needed an external ballast resistor or the coil would get scorching hot and stop firing.
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| Dave_Darling |
Jan 29 2017, 01:19 PM
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#3
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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What does the ballast resistor look like?
The 914 did not have an external ballast resistor in the coil circuit. The coil has enough resistance that it is not needed. Some D-jet cars (73 2.0 at least) had a resistor in series with the head temp sensor. That might look like a ballast resistor. --DD |
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| 80cap |
Jan 29 2017, 04:33 PM
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#4
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Member Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None |
Dave
Here is a picture of the resistor. Attached thumbnail(s)  
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| 80cap |
Jan 29 2017, 04:35 PM
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#5
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Member Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None |
Another view.
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| Dave_Darling |
Jan 29 2017, 05:50 PM
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#6
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Not stock at all. Unless you have a coil that very specifically needs a ballast resistor, I'd leave it out.
--DD |
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| Mark Henry |
Jan 29 2017, 07:09 PM
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#7
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Many old school FLAPS replacement coils needed it, the OE and bosch replacement (blue) coil doesn't.
Stick with bosch unless you're using a matched coil for something like a pertronix, etc. |
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| walterolin |
Jan 29 2017, 08:10 PM
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#8
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Senior Member Group: Members Posts: 685 Joined: 30-November 11 From: Louisville, Ky Member No.: 13,838 Region Association: South East States |
Identical resistor came with my 70 1.7. Djet.
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| McMark |
Jan 30 2017, 07:21 AM
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#9
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
(IMG:style_emoticons/default/agree.gif)
Not original, usage depends on coil, use a Bosch Blue coil and toss that. |
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| 80cap |
Jan 30 2017, 08:15 AM
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#10
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Member Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None |
Thanks
It will go in the trash heap that keeps growing! Brian |
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