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Rancho Shock Position

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Depdog, Oct 25, 2000.

  1. Depdog

    Depdog 1/2 ton status Author

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    Seems that I have gotten several emails lately about running the Rancho 9000 shocks upside down. I think because Steve has shown his version of my rear shock setup. I run mine upside down at all 4 corners, it keeps the shock bodies away from harm a little better, it also let me run the shortest possible air line to my shock controller and not have to worry about leaving a loop of airline for the shock to travel.

    I have contacted Ranch Tech Support and asked about this, one of the magazines also had the same information in an article. The Rancho tech rep said that there it was perfectly fine to run the shock upside down, that most the people he talked to did run it upside down for protection.
    He also said that the only and I repeat only side effect is that after prolonged sitting, the first rebound or two on the shock would be a little less than the setting. In other words, if you had it set on 5, it would be like 3 for the first 1 or 2 rebounds and then it would be like normanl, this is because air gets trapped at the top untill the shock cycles.

    Hope this helps some of yall out.

    Depdog

    <font color=blue>"Lead, Follow, or BECOME the Trail"</font color=blue>

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  2. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    Thank's Dep, I was getting a lot of questions about this also, I think it boils down more to personal preferance. And if people change their mind about which way they want to run the shocks, they can be flipped around the other way very easily. Did Rancho say anything about always having the oil inside the shock resting on the piston seal? I dont think that would be a problem though. I really don't know if it would be better to have a rock hit the shock body or a rock hit the piston.

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  3. Boss

    Boss 1/2 ton status Author

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    Funny,
    I had several questions about that too. I run mine upside down too. MAINLY to protect the airline and knob thingy from the enemy rocks and stuff. And you're right, it uses less air line. I haven't noticed any side effects yet, like the ones you explained. But yeah, it all boils down to preference.
    Boss
    http://www.boss.coloradok5.com

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  4. Shawn

    Shawn 1/2 ton status Premium Member Author

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    I still prefer the shocks to be right side up. I'd rather have the shock body sand blasted with gravel instead of the chrome rod. I'm planning on routing my 9000 air lines up all three brake lines with several zip ties which will keep them out of harms way. The bad side of mounting the 9000 shocks up right is you may have to grind some off the axles shock mount since the bodies are larger then most shocks at the bottom. Just my lousy .02.



    Shawn
    87 K5
    http://www.off-road.com/chevy
     
  5. Depdog

    Depdog 1/2 ton status Author

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    Dont forget to leave a long loop of air line for the shock travel!

    I dont have any problems with the shafts at all. Been running them this way for 2 years now.

    Depdog

    <font color=blue>"Lead, Follow, or BECOME the Trail"</font color=blue>

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  6. Depdog

    Depdog 1/2 ton status Author

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    Well, I also had some first hand experience (not my rig) with the knob being smashed off by a large rock, then when he turned the shock around he pinched off the new knob on the axle with articulation

    Depdog

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  7. Shawn

    Shawn 1/2 ton status Premium Member Author

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    You don't need to leave a long loop of line IF you run the along the brake lines. The rear shocks be routed towards the pumpkin then the 2 lines would go up the single line thats in the middle. I have 32" SS brake lines in the front so that means 32" of 9000 tubing would be zip tied to the brake lines.

    Shawn
    87 K5
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  8. Depdog

    Depdog 1/2 ton status Author

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    He did not mention anything, but I would not think it would be a problem, it has to go up that high when the shock is cycled in the normal position, no leaks on mine yet.

    I think the shocks are double tubed as well, I have a pretty good ding in one of my rear ones. (this is why I have the shock setup that I have now, flexed so much I kinked the shock with the spring) I took it off and set it at 1 and it moved in and out with no bind, it got harder on 2, so I know it was still working.

    Depdog

    <font color=blue>"Lead, Follow, or BECOME the Trail"</font color=blue>

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  9. Depdog

    Depdog 1/2 ton status Author

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    Doh, O.K. brain is finally fully enguaged now, I see what you mean, gonna have to leave one on the rear though, its a little different setup.

    Depdog

    <font color=blue>"Lead, Follow, or BECOME the Trail"</font color=blue>

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  10. CK5

    CK5 In my underwear Administrator Premium Member GMOTM Winner Author

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    I called OffRoad Design to get their take on how to mount the shocks, Steve Watson ran a set of 9000's both upside down and right side up. He said he would always run them right side up and noticed that they were less effective upside down due to air bubbles being pushed through the valve. In fact he had a gas bag brake in one of his shocks when they were upside down and when that happens the gas mixes with the oil and the shock will barely work at all with the valve at the top (upside down). If you want to know more about this, OffRoad design can explain it a lot better than I ever could.

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  11. k5king

    k5king 1/2 ton status

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    i purchased a set of 9000's and called rancho and the tech. told me NOT to run the shock upside down because this could cause serious component failure...i don't exactly like the air line and valve that close to the ground so i'm gonna make a new and improved shock mount to move it further away from the axle and also protect it from the nasty's !!

    DRIVE IT LIKE YOU STOLE IT
     

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