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Bilstein 5100/5125/5165 Split Digressive Valving?

Discussion in 'Suspension' started by Sublime, Oct 8, 2011.

  1. Oct 8, 2011 at 8:31 AM
    #1
    Sublime

    Sublime [OP] Well-Known Member

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    Found this about 5100's being a digressive shock!
    "The shocks feature vehicle specific split digressive valving…..”

    https://www.allprooffroad.com/05tacomafrontsuspension/144

    What's the split digressive mean? (compression/rebound?)

    The 5125s just say they have deflective self adjusting valving……can anyone elaborate? That would be different than the 5100’s? I can feel a difference now that I have them on. The rear end feels a little less stable (the shock compresses easier) but my rear springs have softened up to some degree!

    https://www.allprooffroad.com/tech-info-mainmenu-63/shocksandcoilovers/bilsteinshocks

    Also, anyone running the 5165’s? These things look mean and have the stem top already. Wonder what the measurements are on the 10” travel ones and if they would work well with the 3” AllPro leafs I’ve got my eyes on!
     
  2. Oct 8, 2011 at 10:33 AM
    #2
    Norton

    Norton Senior TW Member

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    Sub'd. :popcorn:
     
  3. Oct 9, 2011 at 11:49 AM
    #3
    Sublime

    Sublime [OP] Well-Known Member

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    Anyone? What do u guys think?
     
  4. Nov 7, 2011 at 9:58 PM
    #4
    rzimm001

    rzimm001 Tearmytaco

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    Split digressive valving is a fancy way of saying that a digressive piston is being used and the valving is not 50/50 but actually split (usually more rebound resistance than compression). In a digressive piston design, the shocks dampening capabilities are felt more rapidly because the piston is concaved and the shims are slightly bent (preloaded) into the dish shape of the piston. The benefit to this over using just heavier grade shims is that the dampening response is felt much quicker but the max yield doesn't really change. So it's sort of a way to get more performance out of the same shock without using thicker valving shims.

    Self adjusting deflective valving is pretty much standard issue in any decently made after market shock (sway-away, fox, etc.) Not really special unless your compairing it to bone stock car shocks. It's essentially like the digressive shock described above (uses a piston with multiple shims stacked in a pyramid on both sides for dampening) only the piston is NOT digressive (concaved). This is known as linear valving. Some companies tend to use digressive valving while others use linear. Typically the digressive valving will have a firmer feel to it and is considered more advanced. Both designs have their purpose so pick your poison. Icon shocks are digressive which is why many people talk about Icons having a firmer ride than some other brands.

    Hope this helps...
     
  5. Nov 7, 2011 at 11:02 PM
    #5
    Sublime

    Sublime [OP] Well-Known Member

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    Thanks man, good info! I realize the 5100's and 5125's all have the same valving!
     
  6. Nov 8, 2011 at 12:07 AM
    #6
    rzimm001

    rzimm001 Tearmytaco

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    I believe they are the same shock. Only difference is the external features because one is universal and the other is specific to a particular vehicle.
     
  7. Nov 8, 2011 at 7:49 PM
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    Norton

    Norton Senior TW Member

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    Thank you!
     
  8. Nov 10, 2011 at 8:36 AM
    #8
    rzimm001

    rzimm001 Tearmytaco

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    Quite welcome :)

    Bilstein must have a great marketing crew working for them. Their verbiage could sell water to a fish haha. However, I remain firmly convinced that when it comes to quality and reputation, there is none better than bilstein. Even their inexpensive shocks seem to outlast all others under hard conditions. I can't wait to see the day that Toyota comes up with an answer to the Ford Raptor. Some bilstein 2.5" coilovers that come factory would be the cat's meow. I'd be the first to buy :D
     
  9. Nov 11, 2011 at 12:32 AM
    #9
    Sublime

    Sublime [OP] Well-Known Member

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    Hell ya......maybe a 2" over similar to AllPro and a SUA pulling 12" front and rear! Still keeping it looking stock, but able to out perform the raptor! Damn, this forum alone should give them ideas of what "should" be done to the tacoma!

    PS - 4.10 gears in all models too! Lol
     
  10. Nov 11, 2011 at 8:23 AM
    #10
    rzimm001

    rzimm001 Tearmytaco

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    Mmmmm :drool::drool:

    Hey! don't tease me like that :p

    The 4.10 gears would just be icing on the cake. Man Toyota needs to quit screwing around with that Baja edition and just go all out.
     
  11. Nov 11, 2011 at 4:49 PM
    #11
    Sublime

    Sublime [OP] Well-Known Member

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    Dude, just noticed your sig says you have a DMZ bedcage and 14" smoothbody's with an aal? Did you relocte your shock mounts? I want more info....and pics lol!
     
  12. Nov 11, 2011 at 4:52 PM
    #12
    rzimm001

    rzimm001 Tearmytaco

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  13. Jun 1, 2012 at 11:24 AM
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    YumaTRD

    YumaTRD Chewie is my Co-pilot

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    What are the rear 5100 and 5150's valved at for the 2nd gen tacoma for compresion and rebound? I'm really liking the 5165's and doing alot of research on them
     
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