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Thread: Auto Trans & Mafless

  1. #1
    Lifetime Member johnv's Avatar
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    Default Auto Trans & Mafless

    Hi all,

    Read a post (which I can't find again) which said some MAF air flow error codes had to be diabled with an auto when running mafless or the auto would go into limp mode.

    Is this correct ? if so which ones ?

    Cheers
    John

  2. #2
    Lifetime Member GMPX's Avatar
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    Not limp mode, but full shift pressure.
    Look under DTC Max Pressure Enablers.
    Set all MAF DTC options to No, only early VT's had the set to Yes.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
    Lifetime Member johnv's Avatar
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    Thanks Ross,

    Yes its for a mates 00-VT.
    so if I was to upgrade PCM to a later operating system this wouldn't be necessary ? :idea:

    cheers
    John

  4. #4
    Lifetime Member GMPX's Avatar
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    Well, they never seemed to be set to go to full line pressure with the later programs. But if you are going MAF-less then it is worth upgrading to a VX+ O.S simply because you won't revert to the back-up VE table.
    Just remember to copy/paste the VT injector flow table as they were different.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  5. #5
    Lifetime Member johnv's Avatar
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    Thanks Ross,

    Yes I was aware that the VT's had different manifold and smaller injectors and will copy and paste injector tables.

    Would an 03/04 300kw auto operating system be the best choice ?

  6. #6
    Lifetime Member GMPX's Avatar
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    Quote Originally Posted by johnv
    Thanks Ross,

    Yes I was aware that the VT's had different manifold and smaller injectors and will copy and paste injector tables.

    Would an 03/04 300kw auto operating system be the best choice ?
    No, first, it's a HSV :wink: , second, the 300KW Auto had 3.46 diff gears.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  7. #7
    EFILive Crew Site Admin Tordne's Avatar
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    Quote Originally Posted by GMPX
    No, first, it's a HSV :wink: , second, the 300KW Auto had 3.46 diff gears.

    Cheers,
    Ross
    I've heard on a few occasions, and from a few people that the HSV tunes are not good starting points, but I've never got the reasons.

    Can anyone elaborate on why the HSV's are not good base tunes, and secondly perhaps advise what is a good reference base tune (i.e. Camaro, Corvette etc.).

    Just curious to understand the logic behind it?

    Cheers,
    Andrew
    EFILive Crew


  8. #8
    Lifetime Member johnv's Avatar
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    Quote Originally Posted by GMPX
    Quote Originally Posted by johnv
    Thanks Ross,

    Yes I was aware that the VT's had different manifold and smaller injectors and will copy and paste injector tables.

    Would an 03/04 300kw auto operating system be the best choice ?
    No, first, it's a HSV :wink: , second, the 300KW Auto had 3.46 diff gears.

    Cheers,
    Ross
    Mates car has 3.46 gears already (sold him mine and I put 3.91s in) so would an operating system from a non mafless car be a better start point ?

  9. #9
    Lifetime Member johnv's Avatar
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    Quote Originally Posted by GMPX
    Quote Originally Posted by johnv
    Thanks Ross,

    Yes I was aware that the VT's had different manifold and smaller injectors and will copy and paste injector tables.

    Would an 03/04 300kw auto operating system be the best choice ?
    No, first, it's a HSV :wink: , second, the 300KW Auto had 3.46 diff gears.

    Cheers,
    Ross
    Mates car has 3.46 gears already (sold him mine and I put 3.91s in) so would an operating system from a non mafless car be a better start point ? any sugestions ?

  10. #10
    Lifetime Member GMPX's Avatar
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    Quote Originally Posted by johnv
    Quote Originally Posted by GMPX
    Quote Originally Posted by johnv
    Thanks Ross,

    Yes I was aware that the VT's had different manifold and smaller injectors and will copy and paste injector tables.

    Would an 03/04 300kw auto operating system be the best choice ?
    No, first, it's a HSV :wink: , second, the 300KW Auto had 3.46 diff gears.

    Cheers,
    Ross
    Mates car has 3.46 gears already (sold him mine and I put 3.91s in) so would an operating system from a non mafless car be a better start point ?
    I saw a std 300KW Auto pull 220KW on a dyno pinging all the way....., you could use the base program from one but you would be better off copying the std Holden spark maps in and go from there. At least the trans stuff would be already sorted.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

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