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  1. #26
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    I hope other people have extra Monarch shocks sitting around.

  2. #27
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    Quote Originally Posted by ehigh View Post
    I hope other people have extra Monarch shocks sitting around.
    These guys seem to:

    Rock Shox Monarch 4.2 - No Hardware 2010 | Buy Online | ChainReactionCycles.com


    Magura

  3. #28
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    Ones that don't cost money, that is.

  4. #29
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    Well, worst case, it can easily be reversed, so no big deal to do it to a shock in use.


    Magura

  5. #30
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    Of course, but in my case I have an extra I'd be willing to sacrifice for worthy experiments.

  6. #31
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    I just ordered parts for the next step.
    I want preset ride heights, and I want them adjustable, so this is going to be electronics.
    I figured to have a couple of adjustable presets would do.

    What do you think about that?


    Magura

  7. #32
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    Mr. Magura,

    What is the purpose of compressing the shock? This would decrease seat angle and decrease head angle, thinks that do not improve climbing comfort and performance.

  8. #33
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    Quote Originally Posted by tacubaya View Post
    Mr. Magura,

    What is the purpose of compressing the shock? This would decrease seat angle and decrease head angle, thinks that do not improve climbing comfort and performance.
    A lower center of gravity would be one reason.
    Another reason is for situations where 160mm travel is not doing any good, like gravel roads and smooth single track, hard pedaling, etc.
    Sprinting could also be improved (not that I do that kind of stuff).


    Magura

  9. #34
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    Quote Originally Posted by Mr.Magura View Post
    With an electric valve, allowing to move air from one side of the air piston to the other.
    By moving air out of the positive chamber, won't that make the spring rate too soft in the "lowered" position? Perhaps you could move oil instead?

  10. #35
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    Quote Originally Posted by beanbag View Post
    By moving air out of the positive chamber, won't that make the spring rate too soft in the "lowered" position? Perhaps you could move oil instead?
    That depends how it's controlled.

    How do you suggest to do it with oil?


    Magura

  11. #36
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    Oil would flow into the negative chamber, and with the small amount of air still in there, would provide a soft hydrolock that limits extension - same as if the shock were shorter in the first place. You could also have a floating piston between the + air and this oil volume, depending on if you wanted the + side to get softer anyway.

  12. #37
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    Quote Originally Posted by Mr.Magura View Post
    Well, my point in this, was rather to be able to lower and stiffen up the rear for climbing and gravel roads, as opposed to Fox just stiffening up the rear, but still leaving the rider hanging 100mm too high to be ideal for the situation.
    I think I will attempt something similar for my Revelation. It could be rather neat to lower the bike like 100mm in both ends.

    This mod is relatively simple to do on the Monarch, but I still haven't figured the solution for the Revelation.


    Magura
    Is the revelation Single or Dual Air?

    If its dual air, I think it is an easy mod. I should try this....

    -S

  13. #38
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    Quote Originally Posted by Mr.Magura View Post
    Don't quite like those 2010's, especially the air inlet... feels like it's going to break off any time. LOL.

    -S

  14. #39
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    Quote Originally Posted by shibiwan View Post
    Is the revelation Single or Dual Air?

    If its dual air, I think it is an easy mod. I should try this....

    -S
    It's dual air, but I can't seem to find room for the valve.


    Magura

  15. #40
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    Quote Originally Posted by beanbag View Post
    Oil would flow into the negative chamber, and with the small amount of air still in there, would provide a soft hydrolock that limits extension - same as if the shock were shorter in the first place. You could also have a floating piston between the + air and this oil volume, depending on if you wanted the + side to get softer anyway.
    Hmm, that's worth some thought if it turns out to be an issue. It will make the system a lot more complicated though, and add like 80 grams to it.


    Magura

  16. #41
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    Quote Originally Posted by Mr.Magura View Post
    It's dual air, but I can't seem to find room for the valve.


    Magura
    Probably needs to go on top, at the crown where the current schrader valve is.

    -S

  17. #42
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    Quote Originally Posted by beanbag View Post
    By moving air out of the positive chamber, won't that make the spring rate too soft in the "lowered" position? Perhaps you could move oil instead?
    Maybe its a good thing.... a pushbutton "plush" setting too.

    -S

  18. #43
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    Quote Originally Posted by shibiwan View Post
    Probably needs to go on top, at the crown where the current schrader valve is.

    -S
    ....and that my friend, is where trouble starts

    It needs to cross the piston somehow, which is not happening from the outside, as far as I am able to figure it right now.


    Magura

  19. #44
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    Quote Originally Posted by shibiwan View Post
    Maybe its a good thing.... a pushbutton "plush" setting too.

    -S
    It depends how it's operated. If it's loaded during the shift, and the flow is cut off fast enough by the valve, things are not changing much.
    The valve I used is extremely fast, so I just need to make sure the electronics behind don't slow things down, which means using fast sensors.

    Magura

  20. #45
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    Quote Originally Posted by Mr.Magura View Post
    ....and that my friend, is where trouble starts

    It needs to cross the piston somehow, which is not happening from the outside, as far as I am able to figure it right now.


    Magura
    Why not? Run a long poly hose from the bottom schrader to the top valve assembly...

    It'll definitely cross the piston and "connect" the bypass between the two air chambers... or am I missing something?

    -S

  21. #46
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    Quote Originally Posted by shibiwan View Post
    am I missing something?

    -S
    You might be on to something. If there is room in the piston for it, it could fly.

    The top cap will need some nifty solution though for this, but that's a minor detail.
    Another thing that needs to be tested, is if the magnet for the switch, can activate the switch through both the inner and outer leg. Else the electronic control is going to be hard to sort.


    Magura

  22. #47
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    Quote Originally Posted by Mr.Magura View Post
    You might be on to something. If there is room in the piston for it, it could fly.

    The top cap will need some nifty solution though for this, but that's a minor detail.
    Another thing that needs to be tested, is if the magnet for the switch, can activate the switch through both the inner and outer leg. Else the electronic control is going to be hard to sort.


    Magura
    Don't even need to go into the air spring or muck with the piston ... just bridge the two chambers with the bypass and put the electronic valve in-line with the bypass tube.

    At some point I'd be looking into modding the damper to use magnetorheological fluids...

    -S

  23. #48
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    Quote Originally Posted by shibiwan View Post
    Don't even need to go into the air spring or muck with the piston ... just bridge the two chambers with the bypass and put the electronic valve in-line with the bypass tube.

    At some point I'd be looking into modding the damper to use magnetorheological fluids...

    -S
    I'm not sure I follow your train of thought here??

    Magnetorheological fluids have been on my ToDo list for a while.
    Trouble is the power consumption.....
    I have some future plan to test high frequency pulsed PSU's in that application.
    By now there are some pretty advanced, high efficiency, LED driver chips out there from Onsemi, that seems to fit the bill.


    Magura

  24. #49
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    Quote Originally Posted by Mr.Magura View Post

    Magnetorheological fluids have been on my ToDo list for a while.
    Trouble is the power consumption.....
    And the weight
    And the abrasion
    And the lousy damping characteristics
    And getting sued by the Lord Corporation

    Not that that's a dis-incentive or anything...

  25. #50
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    Quote Originally Posted by beanbag View Post
    And the weight
    And the abrasion
    And the lousy damping characteristics
    And getting sued by the Lord Corporation

    Not that that's a dis-incentive or anything...
    I guess you got a point


    Magura

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