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Thread: GMPP E67 525hp

  1. #1
    Junior Member
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    Default GMPP E67 525hp

    Hello,
    I recently worked on one of these crate engines.

    Here is the stock file for reference which I believe is GM's latest rev.

    I changed all of the usual desired idle stuff including the min mass air stuff, etc etc. Even though the desired idle showed what I commanded, the idle would never get below ~900rpm. I briefly checked for vacuum leaks and a few other things since it is a crate engine, found one small leak. Has anyone else seen this? The only thing that stood out was the TPS % never dropped below stock as if it had a commanded minimum. I don't have all of the information in front of me and was just playing with it for a really good customer with multiple projects. I was mainly there to help that day with fuel system issues so I figured I would look deeper at a later time.

    Thoughts?

    Thanks,
    -Carl
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  2. #2
    Joe (Moderator) joecar's Avatar
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    That's the stock GM file that came with the controller for the 525hp crate engine...?

  3. #3
    Joe (Moderator) joecar's Avatar
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    They take knock seriously...!!

    They run PE overly rich, could probably make an extra 10-15 hp by making PE not quite so rich (assuming the IFR and MAF/VE are correct).

  4. #4
    Joe (Moderator) joecar's Avatar
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    Look at GM.ETCTP instead of GM.TP.

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