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Anybody running rear disc brakes from ORU?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by thatK30guy, Oct 12, 2001.

  1. thatK30guy

    thatK30guy 1 ton status Premium Member

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    If you know of someone or are using the ORU set up, let me know. I have some questions to ask about the parts in their kits.

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    And yes, of course, its to fit the 14FF rear. [​IMG]

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  3. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Hello?

    Anybody?

    Come on, there has to be someone who is running this set up.

    Don't be ashamed to let me know if you are using this. Big deal if everyone will laugh at you for paying this much for the kit. PM me if you are too ashamed to let everyone know you have it.

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  4. 502Burban

    502Burban 1/2 ton status

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    Jeez, Wes! After that last post, I almost didn't respond. [​IMG]

    I am (sort of) running ORU's stuff. I, too, thought that their prices were way too high. So, I bought just the "engineered" pieces from them: the backing plate/adapter combination. Then I pieced the rest together, myself; i.e. calipers, lines, proportioning valve, etc.

    So, whatcha wanna know about the kit? Lemme know and I'll help with anything I can.

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  5. thatK30guy

    thatK30guy 1 ton status Premium Member

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    I kind of figured you were running this set up. I thought I remembered seeing these pieces on your web site.

    Anyways, I need to know about the round aluminum spacer that goes on the flange and holds the backing plate to the whole spindle. Basically, I want to know the specs and dimensions of it.

    Did you buy those spacers from ORU? They quoted me $110 for a pair of these spacers.

    If I can get the specs for them, I can have them made for cheaper and use my backing plates I have. I know I need to get the holes drilled, but no big deal. Just need info on the spacers.

    Ok, I need to know how thick the spacers are and the outside diameter. If you have a way to measure the outside diameter, great, if not, don't worry about it. The thickness is the most important.

    Thanks for replying!! [​IMG]

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  6. 502Burban

    502Burban 1/2 ton status

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    I had a feeling that was what you might be after. Actually, a friend and I were considering the same thing, so we already pulled the dimensions from these things. Problem is, he's got the plans at his house. I'll try him in a few hours (he's a late sleeper on the weekends and it's only 7:00am here) and post back the info when I get him on the phone.

    Obviously, I could measure my own spacers, but they are already installed.

    We originally started thinking about this when we realized that only the spacer and backing plate are custom items. Everthing else from their kit is sourced from stock parts. It's a nice kit; my buddy has been running it on the back of his K5 for about 10 years, now. He did his swap when they first came out with the kit. When I bought my parts about 3 years ago, they were the only ones that I could find that made a kit for the 14FF. Now, of course, there are several other options that are a lot less expensive. [​IMG]

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  7. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Yeah, I know what you mean. [​IMG]

    Thats about all ORU really does is make those spacers. Everything else is factory items.

    I have the article in Four Wheeler magazine when the first kit was made. ORU was a different name back then. They went by something like "High Tech 4x4" and they used the same stuff, but the spacers were made from pipe steel and had flat steel welded to each pipe to brace them. Not very safe if you ask me. Since then, they have designed the spacers to what they make today.

    I need to see if I can find that issue. Their rear disc kits have been in quite a few magazines and at last count, I think they must have shown it at least 4 or 5 times since 1988.

    I will wait for your friend to wake up and you guys can get the specs then. No hurry here. [​IMG]

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  8. 502Burban

    502Burban 1/2 ton status

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    Also, the backing plate is custom. As near as I can tell, and I checked this with my Chevy parts guy (who is really good), the backing plates come from the front of a later-model GM. It looks like ORU fills the 6 holes that bolts the plate to the spindle and then re-drills them to match the 4-hole pattern to fit the 14FF mounting bolts. Then they paint or coat them.

    They do turn out a nice part, but they are incredibly impressed with all of their stuff, IMHO. Lots of <font color=green>$$$$</font color=green> for just about everything they sell. [​IMG]


    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  9. pcorssmit

    pcorssmit 1/2 ton status

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    I'm running stock 3/4 ton front Chev. backing plates, with a home made spacer about 1" thick, and 3/4 rotors. Works out good, and is dirt cheap. I was able to drill 4 holes in the plate to match the rear axle pattern without filling the original holes. Don't remember all the details as its been a few years, but it does work well. Let me know if you want more info.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  10. michaelm

    michaelm 1/2 ton status

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    i would feel a lot safer about steel spacers then aluminum considering the application
    the only reason they use aluminum is cost saving on machining
     
  11. thatK30guy

    thatK30guy 1 ton status Premium Member

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    What you should do is tell how you feel about those spacers to ORU. They are the ones making these spacers and making a lot more money off them than you or me.

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    &lt;a target="_blank" href=http://coloradok5.com/gallery/thatK30guy&gt;The K30 Collection&lt;/a&gt;<P ID="edit"><FONT class="small">Edited by thatK30guy on 10/13/01 08:11 PM.</FONT></P>
     
  12. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Pete, that spacer you made is what I'm interested in. Can you tell me exactly how thick it is? What did you make it out of?

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  13. californiak5

    californiak5 1/2 ton status

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    What do you think the aircraft flying in the skys are mostly made of?

    [​IMG] <font color=green>Born to Drive My K5</font color=green> [​IMG]

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  14. RGF

    RGF 1/2 ton status

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    I put together a rear disc set-up on a 14bolt a few years back on a rig I have since sold, I used front 3/4 front stuff like Pete said and made the spacer out of steel. The spacer was 1" thick and I wanted it to be steel so I could put two small tack welds between the spacer and axle flange for piece of mind so it wouldn`t work loose.
    When I was putting it all together with new rotors,calipers and pads I determined that the spacer would have been better at 3/4 to 7/8" thick because I had problems with it being too tight and had to used one slight used pad on one side but that may have been in the variation between pad manufacters.
    The brakes worked excellent but of coarse I didnt have an e-brake, I started to make another 14bolt disc set-up with an aluminum spacer for another project but never completed it after playing around with some D-60 front caliper brackets.
    That set-up is done and on a 14bolt van rear: GM Dana60 rotors,calipers, and caliper mounts and no spacer.

    RGF
     
  15. 502Burban

    502Burban 1/2 ton status

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    Just went out and measured the thickness of my adapters, Wes. My buddy went skydiving this weekend, so haven't been able to get the plans as expected.

    Rough measurement is 1.25" thick. As I recall, the outer edge of the adapter, where it nestles up against the back of the backing plate, is beveled to allow it to accomodate the curvature of the back of the backing plate.

    If you would like more dimensions than this, just let me know and I'll get the rest for you next week when I return from Florida (business trip [​IMG]).

    Enjoy,

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  16. pcorssmit

    pcorssmit 1/2 ton status

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    The spacer is just made out of 4 pieces of pipe. Not sure what size (3/4 maybe?), but its just slightly larger than the bolts. Its also a good idea to weld a piece of strap between the pipe sections to stiffen it up. I'll try and measure it later on. I also had to use a slightly worn pad on one side, since the spacer wasn't exacltly the right thickness. Not sure, but I think it may also be do to the Eldo calipers I'm using, I don't think they open up quite as far as the 3/4 ton ones do.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  17. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Thanks man! [​IMG] I had a hunch they might have been 1.25" because a couple years ago, I was messing around with that set up and trying to figure the best thickness to make it work. I came up with 1.25" also.

    If you can, when you get back, and your buddy too, get the measurement and specs later? I appreciate you taking the time to do this and measuring your spacers, too. Thanks! [​IMG]

    BTW, I know exactly what you mean by the 'bevel' on one side of the spacer and the 'curvature' on the back of the backing plate. [​IMG]

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  18. 502Burban

    502Burban 1/2 ton status

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    No problemo! [​IMG] I spoke to my buddy tonight and he will dig out the plans during the week, while I am travelling. I should have better info for you by next weekend.

    Seeya,

    Robb
    '73 GMC Suburban - 502DFI
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  19. pcorssmit

    pcorssmit 1/2 ton status

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    Wes, sorry it took so long to get back to you. I finally got off my ass and measured, and mine are about 1.25" also. Got a pretty good measurement, but it may be off a tad due to my dirty ass brakes and the piles of crap that have accumulated under my truck.

    Pete

    '83 K5, 350 TBI (ex 6.2), 700R4, NP208, Dana 60/14 bolt, 4.56s, Detroits, 3" lift, 15-39.5x15 TSLs
    '97 Dodge 2500 4x4 CC LB Sport, Cummins 5 spd
     
  20. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Well, that makes three of us agreeing the thickness is 1.25". [​IMG]

    Think I'm gonna get ahold of somebody to see if they can make these spacers for me. [​IMG]

    <font color=red>I'm a "black top mudder"!!!</font color=red>

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     

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