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Re: [Cadillac_Performance_Association] Was: A ? For The Ole Timers.... Now: EFI

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  • Fred Barnes
    John: You might want to contact Al at Maximum Torque Specialties. His web site is www.500cid.com or call him at 262-740-1118. I recently stopped by his shop
    Message 1 of 13 , Dec 31, 2002
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      John:

      You might want to contact Al at Maximum Torque
      Specialties. His web site is www.500cid.com or call
      him at 262-740-1118. I recently stopped by his shop
      and had a long talk with him about putting late model
      EFI on my 68 eldo with a 472.

      He gave me the run down on all the things you need and
      most importantly he pointed out that some things for
      the system that are no longer available.

      The best way to do what you are considering is to buy
      a complete car (cadi) and remove everything you need
      for the swap.

      I'm still trying to figure out how "economy" figures
      in any equation involving 500 cubic inches.

      Go get 'em,

      Fred
      --- "j6gunz <j6gunz@...>" <j6gunz@...>
      wrote:

      <HR>
      <html><body>


      <tt>
      Dave,<BR>
      <BR>
      � Do you have any experiance with the factory EFI on
      the '75 500?<BR>
      <BR>
      I was wondering how capable this system is in handling
      compression, <BR>
      camshaft or valve changes?<BR>
      <BR>
      The engine will be used in a 4X4 application.
      Reliability, economy <BR>
      and torque are the priorities.<BR>
      <BR>
      Thank you<BR>
      John<BR>
      <BR>
      </tt>

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    • j6gunz <j6gunz@yahoo.com>
      ... Already have EFI donor ... I know the word economy seems funny when talking about these engines. I should probably say efficiancy instead. In my 4X4
      Message 2 of 13 , Jan 1, 2003
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        > The best way to do what you are considering is to buy
        > a complete car (cadi) and remove everything you need
        > for the swap.

        Already have EFI donor

        > I'm still trying to figure out how "economy" figures
        > in any equation involving 500 cubic inches.

        I know the word "economy" seems funny when talking about these
        engines. I should probably say "efficiancy" instead. In my 4X4
        application I wont have a gas station nearby all the time. This is
        also one of the reasons I would like to pursue the EFI option.

        I called Al a while back, but must have caught him at a busy time. He
        didn't seem to want to discuss my project at the time. I'm not ready
        to buy parts yet. When I am. I'll try him again.

        Thank you
        John
      • mpascino_ny <pascim@rpi.edu>
        ... I am currently collecting parts for this EFI setup but I can say this. I have the same EFI setup on my olds 350 motor. The motor is mostly stock with
        Message 3 of 13 , Jan 11, 2003
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          --- In Cadillac_Performance_Association@yahoogroups.com, "j6gunz
          <j6gunz@y...>" <j6gunz@y...> wrote:
          > Dave,
          >
          > Do you have any experiance with the factory EFI on the '75 500?
          >
          > I was wondering how capable this system is in handling compression,
          > camshaft or valve changes?
          >
          > The engine will be used in a 4X4 application. Reliability, economy
          > and torque are the priorities.
          >
          > Thank you
          > John

          I am currently collecting parts for this EFI setup but I can say
          this. I have the same EFI setup on my olds 350 motor. The motor is
          mostly stock with exception of a mild cam. The system uses three
          sensors to operate, a TPS, air temp, and water temp. There is no O2
          sensor. There is a fast idle "thermal" switch to idle the engine
          down after warm up. There is also another solinode that allows more
          air to flow and increase engine idle when the air conditioning and
          polution equipment is in use. The TPS works off of sequential
          electrical contacts, not resistance like newer systems. While others
          back in the day complained of problems with this analog efi system, I
          am very please with it. Injector size, 2 ohms, on my 350 is 40.6
          lb/hr. I believe the 500 injectors at 70 ish lb/hr. Keep in mind
          with this being an analog setup the injectors sizes are usually twice
          of that you might find on more modern systems. The injectors are
          triggered in banks by two magnetic reed switches in the base of the
          distributor. One thing you could do to alter the richness of the
          system is add or replace the temp sensors with different resistance
          values. Lower resistance, simulating a colder engine, more fuel.
          This generally isn;t a problem if the final resitance values are
          within reason. I have done this myself and it is fine for minor
          differences in amounts of fuel injected. As in any EFI, you can
          always increase the fuel pressure to get more fuel. As long as you
          don't drastically change the power curve I would think you would be
          fine with one of these systems. Hope this helps,
          Mike
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