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hydro assist???

Discussion in 'The Garage' started by skidpan, Oct 24, 2005.

  1. skidpan

    skidpan 1/2 ton status

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    what is the length of movement for one of the hydro assist cylinders?
    has any one ever fabbed up one of their own custom jobs???
     
  2. 1977k5

    1977k5 3/4 ton status Vendor

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  3. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    8" for mine using the factory tie rod mounts. My setup consists of a tractor tie rod ram, custom hoses, a self tapped steering box, and mounts from Kert at DIY4x. I don't remember what the final cost was but it was cheap as hell.

    I would only recommend the setup for a trail only truck though. The steering is a little slow but it will push the tires anywhere you want them to go. I was in a bad spot a couple of times the past weekend and was able to drive out largely due to the fact that I could steer whichever way I wanted no matter how jammed up the front end was.
     
  4. 86Cucvbeater

    86Cucvbeater 1/2 ton status

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    I wasn't aware of the fact that hydro assist would make the steering slow. I was planning on doing this to my truck but I drive on the street to get to the trails. Do you think a different ram would act differently? Does anybody with homeade hydro-assist drive on the street? Thanks
     
  5. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    Hydro assist won't inherently make the steering slow, I'm just using a 2" bore ram and haven't modded the pump yet...that's why it drags, not enough flow. FWIW, it's just fine on road with small tires, it was just fairly slow with the 39.5's when I was jerking it around off road but it did make the difference between me having to winch and being able to drive out a couple of times this weekend.
     
  6. txfiremank5

    txfiremank5 1/2 ton status

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    You need to stay under a 2" bore. Usually 1.5 to 1.75 to keep streering responce in check. Normally the smaller the bore the quicker the reaction from the cylinder. Most report a 2" or larger bore as being to slow for street duty, or slower than they like. Others also speculate that the diameter of the rod can effect responce too .... I'm no hydro specialist, but it sounds reasonable.
     
  7. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

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    With a single ended ram, the rod affects the steering speed on a slow setup like mine quite a bit. When at a stand still and the engine at idle (meaning the pump is pushing very little fluid) I can turn much faster to the right than I can to the left.

    I think if/when I mod the pump it'll be more to my liking. But yes, the general concensus is go to a 1.5" or 1.75" bore for street use. I'm just cheap and didn't know of the surplus center ram at the time.
     
  8. thor

    thor 1/2 ton status

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    I use a 1.5" ram with -4 lines and have no ill effects on-road. However I don't have as much assist either. I did the flow mods, but no pressure mods. I've read that larger lines will speed up a bigger ram, but I think the stock pumps may be the limmitation. I think it's all a compromise, but I like mine enough to buy the same ram for my "new' truck.

    This is the ram I use, but I had to cut off the end and rotate it 90 degrees.clicky
     
  9. skidpan

    skidpan 1/2 ton status

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    so i am going to start peicing together what i need for this.... I am going to keep an eye out for a ram thats 1 1/5 to 2 inches here on base, im sure i could get for next to nothing...are there any write ups for a DIY kind job with this?
     
  10. BozoWise

    BozoWise 1/2 ton status

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    What kind of resevoir are you guys using for the extra fluip capacity needed? Are you using the old radiator hose method?

    Anyone know where to buy the top cap of the steering box already threaded? I have an EMS endcap to use already.
     
  11. 1977k5

    1977k5 3/4 ton status Vendor

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    The best idea I have seen is to buy a remote oil filter kit and plumb it into the ps system. Adds more than a quart of fluid and you get filtered ps fluid!
     
  12. Blazer79

    Blazer79 1/2 ton status

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    Thor:

    Do you have pics of your setup? I'm about to install mine. I also bought it from surplus center, but is a slightly different model.

    When I was about to have the mounting tabs welded I realized that the drag link not only moves sideways and to and from my Dana60, but it also moves up and down due to caster angle. How did you install yours without heim joints?

    Thanks
     
  13. big94gmc

    big94gmc 1/2 ton status

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    I read this in the thread, and figured I'd let you know I've decided to sell my entire setup....see if you're interested. If you want to buy an already built setup, let me know.

    Chris
     

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