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ROW '78 911 Targa
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Took a few minutes tonight and looked at my factory wiring drawings. Something was nagging me in the back of my mind...
The '74-'75 engines DO NOT have a fuel pump relay... They are fed from Fuse 12 coming directly from terminal 15 of the ignition switch. The safety shut off relay was added in '76 Maybe someone added a relay to your car, or it is for something else. May I suggest you add one for safety? A Ford Bronco II roll over switch or similar would be what I would use. For whatever reason the '74 factory workshop drawings are all black and white. while every other year is in color... I am going to do a wire by wire comparison of function and routing with the '75 diagram to see if the wiring is the same and if one could assume the same for the color codes. EDIT.. If anyone has a color factory current flow drawing for a '74 I would like to borrow it to copy on our color print machine and return it to you.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. Last edited by timmy2; 02-02-2014 at 08:29 PM.. |
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02-02-2014, 08:17 PM
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Dennis,
Its a long way for me to post the original to you but if this is what you are looking for PM me. I don't suppose you have a chart or can make a harness for a C3?        Cheers Bill
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1977 Carrera 3.0 This much fun must be illegal! |
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02-03-2014, 03:21 AM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
Posts: 5,235
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I figured out the wiring. Dennis was right, a PO wired one of the relays in the engine panel to power the fuel pump. Once I got all the tape removed I was able to ring all the wires and move several positions in the engine harness plug to match the chassis harness. I also added the air filters:
  I little more wiring work and some mods to the engine electrical panel to mount the MSDs and this bad boy gets installed! |
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02-12-2014, 03:43 PM
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Registered
Join Date: Jul 2006
Location: Charlotte, NC
Posts: 1,964
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Are those blaster coils? Where are the boxes going?
Todd
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'81 SC |
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02-12-2014, 04:15 PM
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ROW '78 911 Targa
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Nice job detecting the custom wiring gremlins.
 Your engine looks great. And a special thank you to Bill for scanning and sending me a copy of colour diagrams.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. |
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02-12-2014, 04:31 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
Posts: 5,235
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They are blaster coils and the boxes are going where the old box, accumulator, and fuel filter used to go. Pictures this weekend.
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"Too much is just enough." |
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02-12-2014, 04:38 PM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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Looks great. Bring it out to the HCR. You can finish by March right?
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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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02-12-2014, 05:32 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
Posts: 5,235
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I'm already signed up and plan on being there. I should be on the road by the end of the month.
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"Too much is just enough." |
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02-12-2014, 05:37 PM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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Great. We are all looking forward to the event. It will be nice to meet you.
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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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02-12-2014, 05:46 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
Posts: 5,235
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You too, Jamie. See you there!
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"Too much is just enough." |
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02-13-2014, 05:58 AM
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Congratulations on the build! As others here, I am looking forward to "final" pics!
Good luck with everything. |
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02-14-2014, 09:39 AM
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Former Options Trader !!!
Join Date: Feb 2003
Location: Bucks County PA
Posts: 6,756
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Thats a work of art!
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Current:88 Guards Red Coupe, 89 Coupe Track Rat, 76 Caddy Eldo Convert. 2015 Aprilia Tuono Wrecked 1987 Targa Guards Red, 2003 Ducati ST4S Sold 1987 Granite Green Targa, 993's, 93 RSA, other 964 coupes, 89 911 Turbo Ruf mods, 90 e30 M3, 07 BMW R1200S STOLEN 94 Speedster |
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02-14-2014, 01:18 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
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Got a lot done today!
This would have been entertaining to watch. I had to remove the stock exhaust while the engine was dangling from the hoist. What a pain!!!  Everything else went pretty well. I grit blasted all the tin and got it painted. Going back on tomorrow. Installed the flywheel, clutch, and tranny. Tried to bolt on the starter, but the studs are too long for the barrel nuts. Off to the store tomorrow. It's really starting to look good!    
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"Too much is just enough." Last edited by mreid; 02-15-2014 at 02:50 PM.. |
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02-15-2014, 02:48 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
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Engine is going in next weekend! I ground out the old sway bar brackets and welded in the new ones, cleaned and painted the spring plates, installed he Rebel Racing bushings and coilovers, and finished the engine wiring and MSD harness. All in all, a productive weekend!
   Once the engine is in, I still have to install the front oil cooler, but at least I move to the front.
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"Too much is just enough." |
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02-23-2014, 03:11 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
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MSD boxes installed and wired:
 I'm now going to attempt to pull the mechanical speedo cable with the wires for the electronic version attached for one easy remove/install. Fingers crossed! |
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03-01-2014, 08:59 AM
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Registered
Join Date: Dec 1999
Location: Richmond, VA USA
Posts: 1,058
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In your picture of the MSD boxes, what is the silver annular ring on the outer half-shaft end, between the bolt heads and the boot retainer?
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03-01-2014, 11:05 AM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
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Good question?
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"Too much is just enough." |
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03-01-2014, 04:22 PM
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non-whiner
Join Date: Aug 2012
Location: Slightly right of center
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And then...
...it's in!     Next up: - connect everything - reinstall rear bumper - move to the front and install front oil cooler
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"Too much is just enough." Last edited by mreid; 03-02-2014 at 12:45 PM.. |
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03-02-2014, 12:39 PM
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Registered
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Great "marriage"!
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03-02-2014, 01:15 PM
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Registered
Join Date: Nov 2013
Location: sf bay area
Posts: 956
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sweet! after it's dialed in, don't forget to post some vid clips!
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1967 911 (Azzuro Thetys) - #308439 1971 911 (PTS Black) - Built 3.6 Sleeper 1989 911 (Grand Prix White) - Cabriolet Bone Stock |
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03-02-2014, 01:44 PM
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Heinz
1977 Porsche 911 Carerra 3.0
Porsche 911
