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What springs for MS4

This is a discussion on What springs for MS4 within the Internal Engine forums, part of the LSx Technical Help Section category; I am a relative newb to these LS engines and am planning to have a cam swap done. I am ...

  1. #1
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    What springs for MS4

    I am a relative newb to these LS engines and am planning to have a cam swap done. I am gathering parts for the swap to have installed. What size springs will I need? I was looking at the Patriot Gold .650" and also saw the PRC .675. Just wanted some thoughts before pulling the trigger. Searched and was unable to find any info for this.
    Thanks in advance!

  2. #2
    I don't sell out! blackSS01's Avatar
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    The MS4 has a .649 lift on the intake side. Either of those springs will work but your cutting it very close with the Patriot Golds. I would def take the PRC out of those two.
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    None Shall Pass Knight's Avatar
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    I'd second the PRC.

  4. #4
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    What about the Patriot Xtreme....Shows they are rated to .660"

  5. #5
    Next... MrKid's Avatar
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    I'm running the PRC .650's that come on TSP 2.5 heads with my MS3. I would go PRC .675 for the MS4 just to be safe.

  6. #6
    Visualize°Design°Create SSwt00SS's Avatar
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    PRC 's. either the .660 or .675 will be fine for your application. if they are the same price, go the .675 and get the most for your money, imo...

  7. #7
    LSX whore allbaugh_04's Avatar
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    I agree, gotta make sure the springs can handle that lift or you'll lose some power. .660 or .675

  8. #8
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    Good deal guys....I will get the .660" springs.

    Thanks for the help I really appreciate it!

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