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Thread: Vortec boost?

  1. 04-30-2008, 06:59 PM #1
    67 ls1 vert
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    Vortec boost?

    How many pounds of boost from a V-9 with a charge cooler should I expect new out of the box with headers and true duels?

    Thanks.
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  2. 05-01-2008, 11:44 AM #2
    andrew rs
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    uhhh that all depends on pulley size. Need more Info!!!
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  3. 05-01-2008, 12:36 PM #3
    67 ls1 vert
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    the one it came with I guess...I think the guy may have gave me a couple pulleys. I have to look in the boxes. I'm not to savvy on the kit yet as I am trying to learn about things still. I bought it used. Is there a number somewhere on the pulley I can tell what size it is?
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  4. 05-01-2008, 02:01 PM #4
    Tman
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    I run the Vortech V9 Gtrim w/aftercooler. The pulley it comes with is the 8-Rib (3.12").

    A change in one pulley size will usually effect boost 1-2 PSIG... down in diameter, up in boost and vice versa.
    Another pulley is the (3.70")

    Looking at the pulley you should be able to see the diameter.
    Call Vortech tech support, they are a great group of guys and will help you out.
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  5. 05-01-2008, 02:17 PM #5
    67 ls1 vert
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    Cool, thanks for the info... I will run up to the shop in a few mins and look. Is the 8 rib (3.12) good for around6 or 8 pounds? I know there is a lot of factors, but just say stock motor with the kit out of the box? Vortech V9 Gtrim w/aftercooler

    How many do they offer?
    Last edited by 67 ls1 vert; 05-01-2008 at 02:23 PM.
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  6. 05-01-2008, 03:13 PM #6
    Tman
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    Quote Originally Posted by 67 ls1 vert View Post
    Cool, thanks for the info... I will run up to the shop in a few mins and look. Is the 8 rib (3.12) good for around6 or 8 pounds? I know there is a lot of factors, but just say stock motor with the kit out of the box? Vortech V9 Gtrim w/aftercooler

    How many do they offer?
    The 3.12 is good for around 8-10 PSIG on a stock motor.
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  7. 05-01-2008, 03:32 PM #7
    67 ls1 vert
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    I took a couple of pictures, trying to upload...
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  8. 05-01-2008, 05:18 PM #8
    67 ls1 vert
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    Here it is. Looks like the dark one in the middle is the stock pulley, but what is the pulley on the right side that is lighter in color? There is no writing on it at all.
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  9. 05-02-2008, 03:58 AM #9
    mghawk57
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    Ac pulley
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  10. 05-02-2008, 04:32 PM #10
    67 ls1 vert
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    thanks mghalk57.
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  11. 05-05-2008, 04:01 AM #11
    mghawk57
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    Your welcome
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  12. 05-05-2008, 08:02 AM #12
    67 ls1 vert
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    I was looking at the silver pulley that you said is for the ac, can that be used for a blower pulley to gain more boost if it fits? It is smaller.
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