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  • Dear Community Members,

    Over the last two years, there have been updates to the environment that have introduced challenges in usability, performance, and security. Efforts to improve the technology, user interface and site performance have revealed weaknesses in the platform and outdated software our site uses. This has made it increasingly difficult and frustrating to support and upgrade to more modern reliable standards that users deserve. This is not the experience we want for the members of this community.

    Members want a fast site that performs well across all devices, to be able to find relevant and interesting content, and easily share through text, images, video, and messaging on a secure platform. Our goal is to provide this user experience to all members. We will be updating to a new platform to better meet the needs of this community and allow us to provide support more efficiently. Our focus is to create a sustainable platform that performs well and loads faster on all devices while offering seamless ways to search and connect. Technology is constantly innovating - by creating an environment that we control we can maintain the site with more frequent improvements and maintenance updates.

    Although change can be difficult, we are here to support you through the process. We make every effort to review existing settings and make the changes needed so the migration goes smoothly. If you notice something doesn’t seem correct once the site goes live, don’t panic! We’ll have a dedicated person monitoring as the site goes live to answer any questions and provide support through this change. What’s next?

    When will this be happening? The plan is to put our current forums into maintenance mode (off line) at around 9am MST on 9/30/2020! The whole transition should take 24-36 hours. We recognize the user experience is slow and there are bugs from the outdated software. The sooner we can change that the better we can make the experience for you. You’ll start to see activity related to cleanup in preparation for migration very shortly. We will post an announcement to the community prior to starting the actual data migration.

    We appreciate each member’s contribution to this community and look forward to an improved experience for you all.

    - Management

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Has someone cracked the mpi ecu ?

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  • Has someone cracked the mpi ecu ?

    I know, I know...I’m going to leave myself wide open to being called silly and come in for some comments like “just get a bigger engine” or “it’s too risky”
    but
    having searched the subject of remapping the GM mpi 555 ecu every other month or so for years, all that’s came up was the silly resistor gimic that presumably tricks the engine into thinking its cold and running rich (dyna something I’m sure was the brand). This is a waste of time gimic for sure...
    but just within the last wee while there, a couple of quite reputable U.K. remapping outfits with real credentials and reputation behind them are advertising remaps for the mpi ecu. Mainly for the 350 and 5.0. Some figures quoted see a wee bit of gain. I’m just not sure I’ve ever known any real gain from a naturally aspirated engine ecu tune. Usually forced induction does well as you’ll know.
    link to one of a handful of them is below. Any truth in it you think ? Any popped up over the pond and better still...anyone tried it ? Likely optimistic with the figures and also I thought it couldn’t be done ??

    https://mychiptuningfiles.com/en/chi...-mpi-260hp-all

  • #2
    Nice website but I don't believe it. Would be great if someone could take a tune for a 5.0 and reprogram for a 5.7, 6.2, 8.2, etc, but would only want a stock tune. If the 555PCM was able to be reprogramed there would be others doing it.

    Each setup is different and there can be areas of slight adjustments to gain performance. Lean out the fuel mix and gain hp, but also can damage the motor. Only way I would want to change the fuel mix or timing curve is with AFR meter and O2 probes.
    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
    07 Seadoo GTX
    Merc Adults Only VP Adults Only
    G-Dad always said "First Liar doesn't stand a chance"

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    • #3
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      Originally posted by AllDodge View Post
      Nice website but I don't believe it. Would be great if someone could take a tune for a 5.0 and reprogram for a 5.7, 6.2, 8.2, etc, but would only want a stock tune. If the 555PCM was able to be reprogramed there would be others doing it.

      Each setup is different and there can be areas of slight adjustments to gain performance. Lean out the fuel mix and gain hp, but also can damage the motor. Only way I would want to change the fuel mix or timing curve is with AFR meter and O2 probes.
      I’m going to call them on Monday. These have just recently been added to their capabilities. dyno set up apparently on some sellers. I’m 50/50 on it !

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