A thought on power/exhaust/factory tune
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2004-2007 Cadillac CTS-V Performance Mods Discussion, A thought on power/exhaust/factory tune in Cadillac CTS-V Series Forum - 2004 - 2007; OK, this may be a stupid question, but... Is it possible that the CTS/V as delivered by the factory has ...
  1. #1
    wildwhl's Avatar
    wildwhl is offline Cadillac Owners Master
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    A thought on power/exhaust/factory tune

    OK, this may be a stupid question, but...

    Is it possible that the CTS/V as delivered by the factory has been tuned FAT so that when the Cadillac authorized aftermarket exhaust (CORSA) hits the street, should it free up flow and lean out the car a bit, no retuning would be necessary?

    Sorry if isn't making sense, but I'm just wondering if GM went past a safe rich tune a bit just to make sure the system didn't lean out and damage the LS6 upon installation....?

    Wildwhl

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    StealthV's Avatar
    StealthV is offline Cadillac Owners Connoisseur
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    Re: A thought on power/exhaust/factory tune

    The data I've logged is showing a 11.5:1 to 12.1:1 air:fuel ratio under WOT so your theory sort of fits but is probably there for a safety factor. Typically the sweet spot is in the 13:1 ratio ballpark.

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    globed70 is offline Cadillac Owners Enthusiast
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    Re: A thought on power/exhaust/factory tune

    Without statistically significant data, my intuition is that GM did not tune anything in anticipation of the exhaust. First stop on the investigation trail should be A/F info from dyno runs on stock Z06... then perhaps on exhaust upgraded Z06 to understand relative effect... that would only be a start, though.

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    Dreamin is offline Cadillac Owners Connoisseur
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    Re: A thought on power/exhaust/factory tune

    The computer compensates... and brings A/F back close to what it wants to see (actually what the EPA wants to see)... it may lean out a *small* amount.

    LS1edit is the answer.

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    Re: A thought on power/exhaust/factory tune

    EFILive Flashscan is the answer.

  7. #6
    wildwhl's Avatar
    wildwhl is offline Cadillac Owners Master
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    Re: A thought on power/exhaust/factory tune

    Quote Originally Posted by StealthV
    EFILive Flashscan is the answer.

    OK - Where do I get it?

  8. #7
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    Re: A thought on power/exhaust/factory tune

    Version 6 is the current release of EFILive. Version 7 will be called Flashscan and will be available later this year.

    EFILive

    Recommend waiting for V7 to come out with the integrated tuning tool. When it does, I hope to have a very competitve price for V owners that are interested.

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