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Cadillac STS-V Series Forum Discussion, pulley options , exhaust size and the usual questions in Cadillac V-Series Forums; I have mine wedged down with an electrical tape wad. About the size of a dime right in the center. ...
  1. #16
    Ninja-v is offline Cadillac Owners Fanatic
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    Re: pulley options , exhaust size and the usual questions

    I have mine wedged down with an electrical tape wad. About the size of a dime right in the center. Sunroof seems to sit a little more flush now actually. Front driver side corner used to stick up about 1-2 mm. Even at 80 it's still quiet

  2. #17
    sts454049's Avatar
    sts454049 is offline Cadillac Owners Member
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    Re: pulley options , exhaust size and the usual questions

    So


    I installed my borla mufflers and the x pipe and ill be fitting my spectre intake tomorrow

    I have a problem though

    My upper fan won't work until I start the ac and if I don't the reservoir will heat up and the car will " puke all the water "

    Fan relay maybe ?

  3. #18
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    baller95 is offline Cadillac Owners Enthusiast
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    Re: pulley options , exhaust size and the usual questions

    Just out of curiosity what are the stock pulley sizes on these cars and what's the lowest you can go (safely)?

  4. #19
    PGA2B's Avatar
    PGA2B is online now Cadillac Owners Connoisseur
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    Re: pulley options , exhaust size and the usual questions

    2.8" is stock and 2.6-2.5 depending on your view of "Safely". Most have had good results with a 2.5 without having to change injectors.
    baller95 likes this.

  5. #20
    TimmyC is offline Cadillac Owners Connoisseur
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    Re: pulley options , exhaust size and the usual questions

    2.4" is okay on stock injectors but just barely.

    If you want more boost than that I recommend my lower pulley ring. 27% more blower speed than stock. Good times.
    baller95 and 2007blackbty like this.

  6. #21
    baller95's Avatar
    baller95 is offline Cadillac Owners Enthusiast
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    Re: pulley options , exhaust size and the usual questions

    Quote Originally Posted by PGA2B View Post
    2.8" is stock and 2.6-2.5 depending on your view of "Safely". Most have had good results with a 2.5 without having to change injectors.
    Quote Originally Posted by TimmyC View Post
    2.4" is okay on stock injectors but just barely.

    If you want more boost than that I recommend my lower pulley ring. 27% more blower speed than stock. Good times.
    I see, how many more pounds of boost will I get with a 2.4" or 2.5" pulley? Timmy, how much for your pulley?

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