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Location: Fayetteville, NC
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2.7 to 3.0 conversion
Did a search but couldn't find the answer. I have a 2.7 w/TBitz EFI and would like to do a 3.0 w/EFI, other than the flywheel, the 3.0 dizzy, what else do I need to switch? Can I use the 2.7 CDI? The 3.0 dizzy has two vacuum connectors, how do you connect them? Any help would be welcomed.
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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03-03-2007, 11:57 PM
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You can't drive a 3-pin CDI with an SC disributor ... it is designed to drive a 6-pin CDI!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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03-04-2007, 12:06 AM
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So, what are my options?
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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03-04-2007, 12:31 AM
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Get a 6-pin Bosch 0.227.300.004 CDI ... or Crane, Mallory, MSD.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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03-04-2007, 12:40 AM
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Any specific Crane, Mallory or MSD if I go that route?
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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03-04-2007, 12:45 AM
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My husband is ill and didn't begin a reply. I'm sorry to interrupt, but I wanted you to know he isn't ignoring the question, he just cannot get back to it. Phyllis Hall
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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03-04-2007, 04:57 AM
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Know problem. Get well soon.
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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03-04-2007, 05:00 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
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EP - Crane or MSD work well. You will need the CDI unit and the matching coils. The problem becomes the interface between the two. Typcially you would connect your wires to the factory connector for the 6 pin CDI unit. There is a green Coax cable the goes from the dist to the Bosch CDI. This carries the signal for the pickup. The connector on the wiring harness is the male side of a Bosch (injector) connector.
the best option is to get the CDI section of a 78 or later engine wiring harness. This will have all the connectors you need. Hopefully it will come with the 3.0 you are buying. If so, everything is easy. You will likely have to swap a few pins in the 14 pin connector in the engine harness. This should take only about 10 minutes during the conversion. I am sure the pinout diagram is in the archives if you do a search.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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03-04-2007, 05:25 AM
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jpnovak,
Thanks. I have the complete harness. I was just wondering if it would be better to get an SC CDI. If I did that, will I have to swap pins on the 14 pin?
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock Last edited by EPorsche; 04-12-2007 at 08:22 AM.. |
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03-04-2007, 05:30 AM
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Monday bump
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03-05-2007, 03:17 AM
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I've tried searching, is there a thread that shows the complete conversion?
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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04-12-2007, 08:23 AM
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