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MegaSquirtPNP Gen 2 in a box...

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    MegaSquirtPNP Gen 2 in a box...

    I’ve read through a few build threads here on grandmarq.net & have seen a few people use the megasquirt system.

    Here's the system I'm talking about: http://www.megasquirtpnp.com/docs/ms....php?isModel=1

    My question is: will it play nice with a 87 MPFI lopo box wagon harness?

    I know its designed to be plug n play for a fox body MPFI... however my logic is that since so many users run fox body HO swaps with the factory box harness; I would assume you can do the same for the MSPNP on a box harness.

    Am I wrong in thinking this? Anybody actually run this set up without having to tear into the harness?

    If the megasuirt really is PNP on a box harness that would be great to say the least.
    Full MAF swap used AP9 is upwards of $500+ (holy shit) and my planned mods are eventually going to require a tune so spending the $800 on MS PNP makes sense for my build.

    Any discussion is appreciated my mangs.

    All the best, Kyle.
    1987 slick top Wagon

    Search "photobucket embed fix" to remove watermark from photos

    #2
    You would have to reprogram the firing order for the injectors and flow rate, but I think that's about it for it to work with a lopo. I think that's the only difference between lopo and HO speed density.

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
    Originally posted by gadget73
    ... and it should all work like magic and unicorns and stuff.
    Originally posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

    Comment


      #3
      Originally posted by sly View Post
      You would have to reprogram the firing order for the injectors and flow rate, but I think that's about it for it to work with a lopo. I think that's the only difference between lopo and HO speed density.
      Hey Sly. To clarify I would be running a HO firing order camshaft with gt40 style intake. I would not run the MS on the lopo long block... When I mentioned lopo above I was referring specifically to the factory harness. Would that still require changes?
      1987 slick top Wagon

      Search "photobucket embed fix" to remove watermark from photos

      Comment


        #4
        If you repin the ecm connector for a fox body (and have HO firing order via camshaft) then there is no reason it shouldn't work that I can think of.
        ~David~

        My 1987 Crown Victoria Coupe: The Brown Blob
        My 2004 Mercedes Benz E320:The Benz

        Originally posted by ootdega
        My life is a long series of "nevermind" and "I guess not."

        Originally posted by DerekTheGreat
        But, that's just coming from me, this site's biggest pessimist. Best of luck

        Originally posted by gadget73
        my car starts and it has AC. Yours doesn't start and it has no AC. Seems obvious to me.




        Comment


          #5
          Originally posted by 87gtVIC View Post
          If you repin the ecm connector for a fox body (and have HO firing order via camshaft) then there is no reason it shouldn't work that I can think of.
          This. If you're running speed density tune... no issues. Mass air of course will need that sensor added, but that's it.

          Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
          rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
          Originally posted by gadget73
          ... and it should all work like magic and unicorns and stuff.
          Originally posted by dmccaig
          Overhead, some poor bastards are flying in airplanes.

          Comment


            #6
            Hmmm I'm gonna have to dig into the archives and figure out what pins need to be moved at the PCM connector... I may just end up going with the tried & true MAF swap after all. Might post a wanted ad here soon for the AP9 computer and associated parts.

            I finally got a decent 3 bar GT40 explorer motor... Well Actually I got the entire explorer lol. It was $800 and the engine runs great. I put 120 miles on it today driving it home.

            It's got great pull even with the horrendous exhaust manifolds they put on these explorers.

            Here's a quick video I took of it, idles smooth:



            It's gonna be great having this motor in the wagon. The old lopo is just tired and this motor just feels wayyy more powerful even unmodified. I was told the explorer cam sucks but honestly it pulls pretty decent.
            1987 slick top Wagon

            Search "photobucket embed fix" to remove watermark from photos

            Comment


              #7
              It should be the same wires to do a MAF conversion. The injector pins do not move. There are a couple pins that currently go to smog control solenoids that move, the MAF goes to those pins. Add the VSS and fuel pump monitor (if you care about that one) and you're done. Its like 6 wires total.
              86 Lincoln Town Car (Galactica).
              5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

              91 Lincoln Mark VII LSC grandpa spec white and cranberry

              1984 Lincoln Continental TurboDiesel - rolls coal

              Originally posted by phayzer5
              I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

              Comment


                #8
                Originally posted by gadget73 View Post
                It should be the same wires to do a MAF conversion. The injector pins do not move. There are a couple pins that currently go to smog control solenoids that move, the MAF goes to those pins. Add the VSS and fuel pump monitor (if you care about that one) and you're done. Its like 6 wires total.
                Wow that doesn't seem so bad. I found a few old threads that have the pins that need to be moved around... Matter fact I think your the one who posted them Gadget lol.

                I'll keep yall updated if I run this Megasquirt PNP set up. I'm currently getting all the hardware accumulated for the GT40 swap right now... so the work will start sometime in the near future.
                1987 slick top Wagon

                Search "photobucket embed fix" to remove watermark from photos

                Comment


                  #9
                  I converted mine years ago and its been fine, but the sad fact is the computers are getting harder to find and the prices are getting stupider. Much as I don't really like aftermarket stuff because of its spotty reliability, the factory stuff is old to the point where its also getting less reliable.

                  further reading implies it doesn't even need a mass air sensor, so it saves that. Shame it doesn't use the stock MAP sensor, that would be an even cleaner install. The fact that it runs only one O2 sensor makes me think its batch fire rather than sequential. Also a negative in my mind.
                  86 Lincoln Town Car (Galactica).
                  5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

                  91 Lincoln Mark VII LSC grandpa spec white and cranberry

                  1984 Lincoln Continental TurboDiesel - rolls coal

                  Originally posted by phayzer5
                  I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

                  Comment

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