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Thread: TBSS 4L60e to 4L80e T42 Swap

  1. #41
    Joe (Moderator) joecar's Avatar
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    I'm still looking thru your files...

  2. #42
    Joe (Moderator) joecar's Avatar
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    Cylinder airmass seems to peg out at 3.67 g/cyl, but this is too high, I can't see this engine pulling in that much air...

    hmmm, this is puzzling...

    ( the attached pic shows both the E38 (red) and E67 (green) APCYL )
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    Last edited by joecar; December 28th, 2012 at 06:48 PM.

  3. #43
    Joe (Moderator) joecar's Avatar
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    You do have a manifold referenced FPR, right...?

  4. #44
    Joe (Moderator) joecar's Avatar
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    Hmmm, at WOT the ACYL drops from 3.67g to 2.96g...

    this tells me that the cylinder air model (i.e. VVE) is not right for WOT...

    engine torque being calculated low supports this (to me it seems too low even when considering scaling for IFR limitation).


    I also see MAP dropping by 7 kPa as throttle opens (altho I don't see the ETCTP pid logged).
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    Last edited by joecar; December 28th, 2012 at 07:02 PM.

  5. #45
    Joe (Moderator) joecar's Avatar
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    In the FAIL 4 log file, I see at WOT that TP dips momentarily, is this intentional...?

  6. #46
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    Quote Originally Posted by joecar View Post
    In the FAIL 4 log file, I see at WOT that TP dips momentarily, is this intentional...?
    No its not intentional. I put my foot the floor and hold it.

  7. #47
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    Quote Originally Posted by joecar View Post
    Cylinder airmass seems to peg out at 3.67 g/cyl, but this is too high, I can't see this engine pulling in that much air...

    hmmm, this is puzzling...

    ( the attached pic shows both the E38 (red) and E67 (green) APCYL )
    I think the MAP drop because it is still pulling through the SC duct work when running NA?

  8. #48
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Evilz28nos View Post
    I think the MAP drop because it is still pulling through the SC duct work when running NA?
    Yes, that could be the reason.

  9. #49
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    Forget the NA pulls but look at the boost pulls in the WOT at 0 and 20mph LOG.

    The WB is good as I have tuned atleast 5 cars since messing with this one with the same WB.

  10. #50
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    What if I remove the T42 Controler and run a stand alone computer to run the 4L80e.

    Do you think it is in the T42 or the E67

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