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duraspark with HEI+TFI diagram

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  • duraspark with HEI+TFI diagram

    As best I can figure from my various diagrams and Bill usn-1's info, this is how the HEI module is used with the duraspark distributor with the TBI system. I opted to not put in the relay for the power because it would just confuse the drawing and is not necessarily needed. The wiring for the TFI coil is basicly the same as for a can type coil, just a different connector.

    Please look this over and find any problems.

    Thanks, Bill for the Irfanview tip also.
    Attached Files

  • #2
    A few less connectors?

    Good diagram, paint shop is a pain isn't it. Was looking over it and was confused as to where all the wires went. But after a few or more minutes in paint shop, my understanding is this. Am I understanding it correctly?

    Thanks,

    Jeff
    Attached Files

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    • #3
      What I had done was to modify a drawing of the duraspark II system-including duraspark module. What you did was to turn it into an all GM system----module inside distributor. The "extra" connectors are the stock Duraspark connectors.

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      • #4
        I missed that!

        Brendan,

        I see what you were doing know. I missed the part of leaving the ign module outside of the disty thus keeping the smaller cap. I understand now.

        Thanks,

        Jeff
        Last edited by Jeff Eggemeyer; 01-21-2003, 12:57 PM.

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        • #5
          I am using a FORD Duraspark distributor in this drawing. I think when you said "leaving the module outside the distributor" you are assuming I'm using an HEI distributor. Putting the 8 pin HEI module inside the ford distributor would be both extremely difficult and pointless.

          Duraspark=FORD
          HEI=CHEVY

          This has been somewhat confused by the writeup on the IH FI page titled "Ford HEI". This is a misnomer.

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          • #6
            I looked for that "Ford HEI" write-up but could not find it?
            I agree a Ford is not HEI. HEI is a GM trademark.

            The only write up I could find is titiled "IH Distributor Conversion to Ford electronic using an external HEI"

            I hope that clears this up, but if I am missing something or anyone would like to contribute to or revise the IH Fuel Injection pages please let me know.
            [CENTER]1994 Buick RoadMaSSter Estate Wagon LT1/4L60E. White and Woodgrain Sleeper...PCM 16188051 With SS/V4P/Custom Tune! WOT 12.9 AFR!

            1990 Chevy Suburban Silverado 5.7L 2wd ECM 1227747 HiWay Lean Cruise 18.5 MPG and 12.5 to 1 AFR at WOT!

            1972 IH 1210 Isky Cammed Balenced 345 4 speed PCM 16197427 Project!

            [SIZE=3][B][URL="http://www.gearhead-efi.com/"]GearHead-EFI.com[/URL] EFI Conversions and Chip Tuners![/B][/SIZE]
            [B]May be all you need to know about EFI![/B]

            and I still help local JustIH members (for fun) free! :cool: [/CENTER]

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            • #7
              Mark, you're right, that page does not use the term "ford hei". The address for the page was ".../ford-hei". Maybe it was the BB thread re: distributor conversion where I saw it misused?

              There is an ancient Chinese proverb:
              "The beginning of wisdom is calling things by thier true names."
              It saves a lot of confusion if everyone tries to use proper terminology.

              Jeff--

              the upper connector with the red and blue wires need not be in the drawing. That connector is used in a stock equipped Ford/AMC vehicle and would not be present in a retrofit.

              Are we on the same page with the distributors now?

              Comment


              • #8
                Yep, I am now. Its just been a long week and this morning I just started in wrestling with the "octopus" as Bill calls it. Gettin it thinned down has been a chore, but well worth it. Have some more to do tomorrow. Have to check with Bill about some pin outs on this harness :confused: when I have had some time away from it.

                Thanks,

                Jeff

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                • #9
                  I also realized that the piece of the harness between the distributor and module shouldn't be in there. This should be accurate for a retrofit into a vehicle which has never had either a Ford or GM ignition.

                  um, IH did use a remote solenoid, right?

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                  • #10
                    oops
                    Attached Files

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                    • #11
                      Originally posted by brendan
                      I also realized that the piece of the harness between the distributor and module shouldn't be in there. This should be accurate for a retrofit into a vehicle which has never had either a Ford or GM ignition.

                      um, IH did use a remote solenoid, right?
                      Nope. IH looks just like a GM setup.... solenoid is on the starter. Also, your diagram looks good but there is something that should be noted. Your diagram shows a Ford TFI coil. If a person was to use the GM HEI coil, you would need to eliminate the resistor wire. GM HEI runs on a 12 volts at all times, not just at cranking.

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                      • #12
                        The 12v at all times with the HEI coils is good to know.

                        The resistor is MANDATORY for the TFI coil. If you don't use it, you'll SLAG the coil in short order.

                        There is some argument, but the Ford design TFI coil is a superior design and puts out more voltage than even performance HEI Coils. From memory, I believe the TFI coil puts out 60K volts stock, while maybe the hottest HEI coils reach that much voltage.

                        Does the IH starter solenoid have two posts on it like the one pictured in my drawing? If not, a relay will have to be inserted if the TFI coil is used so that the coil can be supplied with 12V during cranking to aid starting.

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                        • #13
                          oops
                          Attached Files

                          Comment


                          • #14
                            Is the last diagram the one everyone has settled on as being correct? Will be hooking mine up soon and want to pile all info into one folder for reference later during install/wiring. Wife does'nt like an oily keyboard!!! Thanks
                            My "Disasterpiece"
                            1970 800A 4X4,HFI'd,304,B/W,27,44,3:73,28's.
                            The rest are in my 25 year plan!

                            My "Ruedh"
                            FREE 1972 1110 4x4,V8(?)727,205,44 drum/60/3.54's,small cheap tires.
                            LOOOOADS-O-RUST!! Donor body located. Not!! JY owner played the "crusher value" card. : angry:
                            NON-working rear window. Need info!!!

                            www.northtexasbinders.com

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                            • #15
                              If you are planning to run the TFI coil. The GM coil does not require the ballast resistor.
                              Bill USN-1

                              COMMITED TO TEACHING PEOPLE THE "PROPER" WAY TO EFI
                              HAMILTON FUEL INJECTION
                              May be the answer to all your fuel injection needs!
                              Learn to do it right.

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