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Thread: AST 5200 w/ Remote Resevoir Nitrogen Fill Specification

  1. #1
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    AST 5200 w/ Remote Resevoir Nitrogen Fill Specification

    I have a set of AST 5200 remote resevoir shocks. Does anyone know the nitrgen fill specification for these shock? I have searched but I guess my Googlefu is weak. Any help is apreciated

  2. #2
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    By "fill specification", I assume you mean nitrogen pressure.
    I typically fill my Moton Clubsports to 150psi, they're pretty similar to 5200s. Also; the cavitation dynamics of oil don't change much between shock brands.

  3. #3
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    125-250 is the typical range ... we run 175 and adjust from there.
    Check out the 8legs Racing page: https://www.facebook.com/8legsRacing/


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    Thank you! I really apreciate the information.

  5. #5
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    Quote Originally Posted by ScotcH View Post
    125-250 is the typical range ... we run 175 and adjust from there.
    Out of curiosity, what kind of characteristics/issues/items are you evaluating to determine how and which way to adjust psi? Is it something outside of how you are adjusting hi/lo compression/rebound and springs settings? Guess I shouldn't be surprised that this is an adjustment setting people play with but I never thought of it.

  6. #6
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    Quote Originally Posted by BlackHawkRacing View Post
    Out of curiosity, what kind of characteristics/issues/items are you evaluating to determine how and which way to adjust psi? Is it something outside of how you are adjusting hi/lo compression/rebound and springs settings? Guess I shouldn't be surprised that this is an adjustment setting people play with but I never thought of it.
    From my motorcycle suspension days. And I'm far from a suspension expert:
    Assuming monotube with compression piston....
    minimum gas pressure: to insure oil is compressed enough to prevent cavitation, and to always have more pressure than the compression chamber.
    max gas pressure: is simply the max pressure the system can handle without blowing TFU.

    In between, can be used as an adjustable progressive spring rate. If that's your thing.

  7. #7
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    Quote Originally Posted by BlackHawkRacing View Post
    Out of curiosity, what kind of characteristics/issues/items are you evaluating to determine how and which way to adjust psi? Is it something outside of how you are adjusting hi/lo compression/rebound and springs settings? Guess I shouldn't be surprised that this is an adjustment setting people play with but I never thought of it.
    We play with pressure to tune the spring rate ... if we need a bit more rear spring, we can crank the pressure up a bit ... kinda like adding 50lbs/in say without having to swap springs. We also drop the pressure to minimum for rain races to get a bit more compliance in the suspension.
    Check out the 8legs Racing page: https://www.facebook.com/8legsRacing/


  8. #8
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    Quote Originally Posted by aeronaut View Post
    From my motorcycle suspension days. And I'm far from a suspension expert:
    Assuming monotube with compression piston....
    minimum gas pressure: to insure oil is compressed enough to prevent cavitation, and to always have more pressure than the compression chamber.
    max gas pressure: is simply the max pressure the system can handle without blowing TFU.

    In between, can be used as an adjustable progressive spring rate. If that's your thing.
    Quote Originally Posted by ScotcH View Post
    We play with pressure to tune the spring rate ... if we need a bit more rear spring, we can crank the pressure up a bit ... kinda like adding 50lbs/in say without having to swap springs. We also drop the pressure to minimum for rain races to get a bit more compliance in the suspension.
    Very cool. thanks to both for your responses.

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