Thread: M90 Bypass Engagement Switch

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  1. #1 M90 Bypass Engagement Switch 
    GTP Level Member Impala131's Avatar
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    Hey all,

    Preface this by saying, there is no practical/logical reason to do this, just thinking it would be a cool gimmick....

    Say you have a switch wired in series with the PCM control of the boost bypass solenoid. (A big red button on your center console or dash, etc.)

    You go WOT, and the S/C stays in bypass (building less boost obviously), then you press the button (bypass closes), and it gives you an extra slap of speed.

    Seems like the wiring would be very simple, and wiring it in series with the PCM means that you won't activate it under conditions where the PCM would consider it unsafe to do so.... thoughts? Could be a cute little project. I was thinking about tying the performance shift pins into the same button, kind of like a "performance mode" that changes several characteristics in one go.
    2003 Grand Prix GTP.... the journey begins again....
    E85 Self Tune with HPT, 80# Injectors, Gen V 3.4 pulley, SD Headers, AL605 Plugs
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  2. #2 Re: M90 Bypass Engagement Switch 
    GTX Level Member nos4blood70's Avatar
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    Seems like this would make the input shaft cry even more.
    -Carl
    "Penelope" - 145k Miles 2003 Bonneville SLE


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  3. #3 Re: M90 Bypass Engagement Switch 
    Schooner Tuner ADrugDealer's Avatar
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    https://www.youtube.com/watch?v=qeaZgX_N7r8

    Much more useful, something me and Frosty made.
    2008 G8 GT - IOM - LSA Blower, Intercooled, Ported Heads, Cam, Flex Fuel Conversion, Tuned - 550whp - 11.5 @ 124 -
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  4. #4 Re: M90 Bypass Engagement Switch 
    GTP Level Member 99GT2dr's Avatar
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    Show us on the doll where your transmission touched you. Talking about it might make you reconsider your plan to kill it.
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