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Thread: 2011 CTS-V lossing Boost any help would be great

  1. 12-31-2014 #1
    S-Prince
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    2011 CTS-V lossing Boost any help would be great

    After engine temps ECT 195-200 F.. boost drops from 199 kpa =13ish psi

    After warm up 148-165 kpa=6-8.5 ish psi. I was wondering if there is something in the tune that
    can be changed?

    I thought it could be IAT2 but it happens after only 5min of driving and it is a chilly 30* day.
    could it be bypass valve?? On my shelby and lightning re routed for instant boost not sure if the same can be done as I have not read it any where yet??


    List of mods
    9.5 crank pulley
    air raid filter
    80lb inj
    Circle d 2800-3000
    14 shelby 12.08@125 stock
    LS swapped Buick t type 5.3 76mm turbo 13psi 4l80e [email protected] HP tuned
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  2. 12-31-2014 #2
    BMWMD82
    BMWMD82 is offline
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    Belt slip would be my thought. I'll admit that I don't know much about these blowers' electronic controls though. Did this just start happening?
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  3. 01-01-2015 #3
    S-Prince
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    I thought about that, I have larger idler pulley to stop belt slip.. and I just noticed it, as i do not drive it much.
    14 shelby 12.08@125 stock
    LS swapped Buick t type 5.3 76mm turbo 13psi 4l80e [email protected] HP tuned
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