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Join Date: Dec 2009
Posts: 311
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Permanent live too my MSD
Can I take the permanent live to my MSD from “fuse box 3 in the engine bay” or will this put too much load on the fuse
 
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05-30-2022, 11:38 AM
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Full Send Society
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Totally fine.
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-Julian 1977 911 S: Backdate, EFI/ITB, AC project in the works: http://forums.pelicanparts.com/porsche-911-technical-forum/1106768-when-well-enough-cant-left-alone-backdate-efi-itb-ac-more.html |
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05-30-2022, 12:21 PM
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Join Date: Dec 2009
Posts: 311
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Is going past the fuse correct or before
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05-30-2022, 12:33 PM
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Full Send Society
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I have mine before the fuse with an inline fuse to protect the MSD unit. If you put it after the fuse you may have to change the fuse to a higher amperage but that’s probably not advisable.
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-Julian 1977 911 S: Backdate, EFI/ITB, AC project in the works: http://forums.pelicanparts.com/porsche-911-technical-forum/1106768-when-well-enough-cant-left-alone-backdate-efi-itb-ac-more.html |
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05-30-2022, 01:10 PM
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I ran mine like that for years without issue, although many will tell you to run a line off the starter.
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Rutager West 1977 911S Targa Chocolate Brown |
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05-30-2022, 03:57 PM
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What I like to do for power in the engine bay , is run a 10ga from the starter battery cable to the engine bay. At that point I can run a relay for ignition hot or just constant hot . Fuse as needed .
Ian
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Kermit, 73 RS clone, Just Part of the Team Chris Leydon ,Louis Baldwin ,Peter Brock ,Riche Clark Jerry Sherman ,Rob McGlade ,Donnie Deal Hank Clarkson ,Craig Waldner ,Don Kean ,Leroy Axel Gains |
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05-31-2022, 06:03 AM
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Why do you want it hot at all times? I ran mine through a relay thats switched on with ignition.
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05-31-2022, 08:08 AM
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The MSD wants the primary + to be hot all the time , then the internal MSD switch activates with the key to make the system hot .
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Kermit, 73 RS clone, Just Part of the Team Chris Leydon ,Louis Baldwin ,Peter Brock ,Riche Clark Jerry Sherman ,Rob McGlade ,Donnie Deal Hank Clarkson ,Craig Waldner ,Don Kean ,Leroy Axel Gains |
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05-31-2022, 08:12 AM
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1977 Porsche 911S Targa
