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Ballast unit missing
With much thanks to Early S man I know know why my tach doesn't work. No ballast unit. Anybody know where a ballast unit for a 1971 2.2T can be had. Does our host have them. Is there a substitute? Can one be fabricated. I'm sure it is some kind of big resistor.
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Steve F 69 911 71 911 87 Carrera 2004 RAM 1500 4x4 "Hemi" |
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08-29-2004, 02:07 PM
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bump... anybody?
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Steve F 69 911 71 911 87 Carrera 2004 RAM 1500 4x4 "Hemi" |
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08-30-2004, 08:31 AM
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Bird. It's the word...
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Okay, I'll go out on limb... I'm fairly sure any 12 volt ballast resistor will do the job. They should be available at automotive supply shops. I replaced the original in my car when I upgraded to a Crane XR700. It came with the Crane coil. It looks very different to the original Bosch being ceramic as opposed to the Bosch alloy and epoxy. I suspect the price will not be too much and not worth fabricating your own.
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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08-30-2004, 05:02 PM
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Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,792
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Where is the thing?
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08-30-2004, 09:49 PM
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Bird. It's the word...
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On my 69 I found it on the left side of the engine bay with the relays.
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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08-30-2004, 10:37 PM
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Bird. It's the word...
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Oops, I have been corrected and informed there are two different kinds, one for the primary coil and another for the tacho... So please ignore me
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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08-30-2004, 10:54 PM
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Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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There are actually three ballast units available ... all are three-terminal resistive dividers, all have three 'pigtail wires' with terminals on them, and are all mounted on the relay plate/panel!
For battery-coil ignitions, there are two, both are shallow rectangular boxes: Beru ... 901.602.852.00 Bosch ... 901.602.853.00 For CDI ignition, there is only one, and it is cylindrical, aluminum can, taller than a round relay ... 901.602.601.00 The CDI and battery-coil devices aren't interchangeable, and I don't have the resistance values.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' Last edited by Early_S_Man; 08-31-2004 at 09:09 AM.. |
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08-31-2004, 07:52 AM
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1969 and 1971 Porsche 911T/E 2.0L and 2.2L
1969 Porsche 911T 2.7RS Spec with Webbers
