EFI to Carb Distributor Help
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Old March 31st, 2012, 07:31 PM   #1
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EFI to Carb Distributor Help


I am finishing up my 5.0 build on my 88 from an EFI to a carb setup. I am just down to the distributor. I have done a lot of searching and I have not found anything that had a definite answer. I want a distributor that is self contained, no box, and easy wiring. I do not know if I am asking a lot here, but I am tired of looking. Any ideas?
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Old April 1st, 2012, 04:34 AM   #2
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What do you mean self contained? You'll have to run some sort of ignition to control the dizzy
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Old April 1st, 2012, 08:56 AM   #3
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You're thinking of a Chevy style HEI. They make them for Ford but they don't belong there.
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Old April 1st, 2012, 10:26 AM   #4
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Let me google that for you
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Old April 1st, 2012, 01:48 PM   #5
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Ya I know very little when it comes to the carb world. I am slowly figuring this out. I bought a roller 88 and the wiring for the efi was cut in so many places and the computer was gone. So I decided to go with a carb setup to save time and not screw with the wiring. So the last part I need is the distributor, I do not know who is a good company and easy set up. Just curious what everyone else is running.
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Old April 1st, 2012, 08:49 PM   #6
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You need a distrib out of a 85.. should work fine.just going to have to get power and one for the rpm..easy to hook up.run the wire from the starter solenoid..but I've always used it out of the 85 model..
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Old April 2nd, 2012, 11:58 AM   #7
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1. Do not use an EFI in tank fuel pump with a carb. You will never get the pressure/flow regulated properly. If the add on pressure regulator fails, you will flood the engine with gas and wash all the oil off the cylinder walls. That will cost you big time $$$. Either go full EFI or use a tank/fuel pump/fuel lines out of an 84 or earlier Stang. Fabricating your own setup is possible but there are some snags to overcome.

2. Do not attempt to leave the EFI computer in place in an attempt to control either the electric fuel pump or ignition. Doing so qualifies you for the “Road Kill Mechanics Award”.

3. If you try to use your current tank, you will need to pull the fuel pump out and fabricate a pickup tube & strainer sock to replace the fuel pump. Or you can have a sump fabricated and welded onto you existing tank. Many welding shops will not weld fuel tanks because of the dangers involved if the tank isn't purged properly.

4. You will need an external electric fuel pump unless you change the timing cover for one with the mechanical fuel pump mount on it. Rip all the EFI wiring out, and the computer controlled fuel pump won't work. You will need to add a relay & switch and wire in the existing inertia switch for an external low pressure electric fuel pump. Do not try to wire the fuel pump without the relay. The 15-20 amps the pump pulls will overload the circuit. This will take power away from other items on the same circuit or cause the fuse or fuse link to blow.

5.

6. You will need to run some new fuel feed lines or braided hose. The 3/8" aluminum tubing works well, but you will need a flaring tool and bending springs to fabricate the lines. Braided hose is easy to run and route, but is much more expensive. It is about $3.50-$4.00 a foot plus the end fittings, which are $3-$4 each. Fabricating hose assembles can be difficult, but anyplace that makes hydraulic hoses can do it for you for an extra charge. See Amazon Hose - Rubber, Hydraulic and Industrial Hose - since 1919 for more information.

7. For some help fabricating your own stainless steel hose assemblies, see
8. www.TurbineFun.com

9. For stainless steel braided hose and fittings for automotive use:

10. See Search Results for stainless - SummitRacing.com steel hose&dds=1
11. Search Results for stainless - SummitRacing.com steel hose&dds=1

12. http://www.jegs.com/webapp/wcs/stor....Term=stainless steel hose&x=18&y=4

13. See http://www.aeroquip.com/pages/performance.html for more information on High performance automotive hose products

14. AN fittings require a 37 degree flaring tool. A standard automotive or household plumbing tool is 45 degrees and cannot be used with AN flare fittings. If you do, the flare is subjected to too much stress when the fitting is tightened, and is likely to fail or leak.

15. See MSC Industrial Supply Co. | Find Power Tools, Hand Tools, Machine Tools & More , McMaster-Carr or for the flaring tool you will need . Prices start at $85 and go up

16. MSC Industrial Supply Co.
17.

18. McMaster-Carr
19.

20. Last time I was in Summit racing, they had a 37 degree flaring tool for less than $40. It may or may not be a catalog item.

21. While you are at the electrical part, you'll need a Duraspark or similar ignition system. The 85 Mustang GT 5 speed has a suitable Duraspark distributor with a steel gear compatible with the roller camshaft. The EFI ignition depends on the EFI sensors to advance the spark. Rip out the TPS and MAP/Baro sensors and the computer will have no idea of the proper ignition timing for best performance. Running a fixed timing setting is only for test purposes or for a race track only car. Don't try it on the street: the results will not be nearly as good as a properly setup Duraspark or equal. Crane makes a really nice distributor for non-EFI applications. . See Crane Cams | Automotive Home Page for more information. Cost is about $400, which makes the 85 Mustang reman units look really appealing.

22. Tools needed:
23. Crimp tool for connector pins $9-$30 AutoZone, NAPA, Advance Auto Parts or other store
24. 100-150 watt soldering gun (recommend WELLER 8200PK soldering gun kit 100/140W) $30 at Lowes or $40 at Home Depot
25. 3/32”-1/8” rosin core electrical solder, 1/4 lb roll $6 at Ace Hardware, Home Depot or Lowes
26. Assorted sizes of heat shrink tubing. Buy long pieces and cut length to fit. It is cheaper that way. Parts-Express.com - Heat Shrink Index: 2:1 Ratio, 3:1 Ratio, Heat Shrink Kits
27. Hot air gun to shrink the tubing ($30-$40) Home Depot
28. Jeweler’s screwdriver kit $5 at Ace Hardware
29. Assorted automotive wire, 18-16 gauge 10’-20’ foot spools in different colors. $5 a roll at Advance Auto Parts.
30. Ford connector pins AutoZone, NAPA or other store $5-$10 for a kit of 10-12 assorted pins

31. You will have $110-$150 in materials and tools if you don't already have them.

32. The water temp and oil pressure signals feed from the sender to the main harness through the 10 pin EFI engine harness. To utilize these senders, you need to identify the wires and find a way to reconnect them to the main harness after the EFI engine harness is removed. You need a weatherproof quick connector to join the sender wiring to the main harness.

33. See the graphic for the 10 pin connector circuit layout.
34.
35. The injector power pin is the VPWR pin in the black 10 pin connector.

36. You will need to construct a wiring harness from the ‘85 carb distributor to the Duraspark box if you go Duraspark, or other distributor to coil wiring.
37. The voltmeter picks up its signal from the switched voltage present on the instrument panel, so you don’t need to worry about that.

38. The fuel tank gauge is also independent of the computer wiring.

39. AutoZone wiring diagrams can be found if you are willing to dig through the self help repair section of their website. AutoZone.com | Page Not Found

40. How to solder like a pro - Fuel Injection Technical Library How To Solder Like a Pro a must read for any automotive wiring job.

41. Soldering pigtails onto existing pins is road kill quality work as far as I am concerned. Take some time to study the way the Ford connectors are assembled and you will find that a small jeweler’s screwdriver will release the pins from the connector shell. New pins and a crimping tool are available from the Standard Motor Parts or Bendix Electrical parts line that the NAPA & Bumper to Bumper Auto Parts stores carry. Ask any auto parts store about Standard Motor Products or Bendix Electrical wiring parts. Those that carry them will be able to get the parts you need. AutoZone has a cheap kit with 10 pins for about $5. Just enough pins to leave you short when assembling a connector.

42. One of the interesting things about the Ford OEM wiring diagrams is that the connector shape on the drawing matches the connector shape in the car. That makes it easier to identify connectors and circuits. OEM Ford diagrams are available at for an 85 Mustang at
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Old April 2nd, 2012, 01:00 PM   #8
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^^ Nice right up man
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Old April 2nd, 2012, 02:38 PM   #9
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Originally Posted by weaverkb View Post
You're thinking of a Chevy style HEI. They make them for Ford but they don't belong there.
Performance Distributors makes them for Ford. Pretty straightforward to set up unless you're running enough RPM or boost to need a MSD type ignition.
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Old April 2nd, 2012, 07:40 PM   #10
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Thanks for the help and the write up. I am working on the fuel now, just ordered a new tank for a non efi setup. Thanks for the help.
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Old April 2nd, 2012, 09:53 PM   #11
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I think I am going with the Proform HEI 66969R. From what I was reading online, I will have to go to a steel gear. Is that true? Will any steel gear fit on there?
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