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Runnin on empty
 
acme911's Avatar
 
Join Date: Nov 2011
Location: Monterey, CA USA
Posts: 516
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Will a ‘74 CDI work in a ‘79?

Will a ‘74 CDI work in a ‘79?
I'm helping out a friend. His ‘79 3.0 CDI has crapped out and I have one
from a ‘74 2.7. Can they be swapped?

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'74 911, Steel Wide Body Hotrod, 3.0, Jenvey ITB’s, AEM Infinity, KW V3's, Eibach Sways, JWest shifter and other stuff.
https://forums.pelicanparts.com/porsche-911-technical-forum/1006126-midi-modded-bumpers-led-headlight-manifold.html
Old 05-18-2019, 02:45 PM
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Trackrash's Avatar
 
Join Date: May 2007
Location: Fortuna, CA. On the Lost Coast near the Emerald Triangle
Posts: 7,129
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No. The SC CDI is a 6 pin unit, as opposed to the 3 pin from the '74. The SC unit is triggered from a magnetic unit in the distributor where as the '74 uses points. Not to mention the fact that the wiring harness and associated ignition wiring are totally different.
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Old 05-18-2019, 02:53 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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acme911's Avatar
 
Join Date: Nov 2011
Location: Monterey, CA USA
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Thanks Trackrash! I’ll let my buddy know.
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'74 911, Steel Wide Body Hotrod, 3.0, Jenvey ITB’s, AEM Infinity, KW V3's, Eibach Sways, JWest shifter and other stuff.
https://forums.pelicanparts.com/porsche-911-technical-forum/1006126-midi-modded-bumpers-led-headlight-manifold.html
Old 05-18-2019, 03:21 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Armin
 
Join Date: Aug 2018
Location: Texas
Posts: 180
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Trackrash is absolutely right. 3 pin vs 6 pin.


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Old 05-18-2019, 04:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
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