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Anyone who has done the rear shock mod...

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Thumper, Oct 15, 2001.

  1. Thumper

    Thumper 1/2 ton status

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    To do the shock mod like the uAV has, is there an optimum angle that they need to be angled in to? I will be doing it this week, and wondered if theres any math I need to do!
    Thanks

    Mike


    <font color=blue>Thumper
    85 Fullsize Jimmy
    [​IMG]
    <font color=red>Aint Skeered!! </font color=red>
     
  2. 55Willy

    55Willy 3/4 ton status

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    From what I have heard the angle is 22.5 degrees. My friend mounted the ones on his Sammy that way and thats what I figured mine for.

    <font color=red>Life is like a mud hole:</font color=red><font color=blue>
    When the S#!T gets deep, you have to keep moving and friends can always pull you out</font color=blue>
    55 Willy's
     
  3. Thumper

    Thumper 1/2 ton status

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    22.5 eh? Wow, thats pretty exact.

    Thanks

    Mike


    <font color=blue>Thumper
    85 Fullsize Jimmy
    [​IMG]
    <font color=red>Aint Skeered!! </font color=red>
     
  4. TXsizeK5

    TXsizeK5 1/2 ton status

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    What rear shock mod??

    6in 87' K5 w/ 35" BFG muds.
    305/Sm465/ NP208
    Kn filter and 4.56
    "Those who live by the sword get shot by those who don't"
     
  5. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    I ballparked mine...[​IMG] I still have the RS5000 shocks for a 4" lift on the rear, 12" apart up top and right next to the spring perches on the axle end. My mount bar is tight up against the underside of the frame and the shocks lean towards the front of the truck a few degrees. At max flex with one tire in the air my shocks are not maxed out and I gained quite a bit of travel. A side benefit is that it actually rides nice in the rear now. Before it was almost as harsh as the front.

    I could run longer shocks, but then they'd have to be mounted closer to each other at the top so they didn't botom out under compression.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  6. 85m1009

    85m1009 1/2 ton status

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    Do it the easy way. Check out this mount.
    <a target="_blank" href=http://www.mooffroadoutfitters.rockcrawler.com/whats_new.html>http://www.mooffroadoutfitters.rockcrawler.com/whats_new.html</a>

    <font color=green>Steve Frisbie</font color=green>
    <a target="_blank" href=http://www.mooffroadoutfitters.rockcrawler.com>www.mooffroadoutfitters.rockcrawler.com</a>
     
  7. Thumper

    Thumper 1/2 ton status

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    Very nice setup. I wish I could, but by the time it got to me here in Canada, Id be lookin at nearly $250.00 without shocks. Us northerners just have to try and fab as best we can the same type stuff. Mine wont be as beefy as your setup is, but should do the trick. I am using 3" angle x 1/4" steel cut and welded to kinda the same shape and idea only upside down. I am going to mount it to the top of the frame, and it will basically let the top shock mount be about 1.5" above the top of my frame. (I have a 3" body lift). I will get some pics of the process, and the finished product to post.

    Thanks for the input.[​IMG]

    Mike


    <font color=blue>Thumper
    85 Fullsize Jimmy
    [​IMG]
    <font color=red>Aint Skeered!! </font color=red>
     
  8. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    I didnt do any math on mine.Iv got 5012s in back.On the axle both shocks are on the front of the axle on the factory mounts,up top I built a new crossmember for an upper mount.At the top there 5" apart.Dont know what angle there at though.

    A balanced diet is a beer in both hands.<a target="_blank" href=http://community.webshots.com/user/beaterwhang>community.webshots.com/user/beaterwhang</a>
     
  9. 84k5

    84k5 1/2 ton status

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    I have a question about this...When the axle moves back/foward as it articulates, how do the shocks move foward and back since they are no longer paralell(sp?) to the spring? Do the bushings give enouogh to keep something from breaking or what? Am I making any sense?

    Brian
     
  10. Thumper

    Thumper 1/2 ton status

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    I dont think it moves enough to worry about... anyone?

    Mike


    <font color=blue>Thumper
    85 Fullsize Jimmy
    [​IMG]
    <font color=red>Aint Skeered!! </font color=red>
     
  11. FRIZZLEFRY

    FRIZZLEFRY 1/2 ton status

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    At full droop my axle only comes foreward a couple of inches but that doesnt change the angle of the shocks much.The bushings give enough .Full stuff to full droop in the back is about 28" and I dont have any problems with the shocks binding.I found an ok pic .Its from before I did the Springer shackle flip but the shock set up is still the same.community.webshots.com/user/beaterwhang
     
  12. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    I ran this idea passed a desert racer. Reply back was this way of mounting is good for low speed stuff, for running the dez, the mounting points need to be perpendicular to the frame. That's my plan.

    Bubba Ray Boudreaux,
    "It wastes drinking time."<a target="_blank" href=http://community.webshots.com/user/mdntrdr1>http://community.webshots.com/user/mdntrdr1</a>
     
  13. laketex

    laketex 3/4 ton status

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    plus the piston rotates inside the shock body, I dont see why they'd ever bind unless you get a lot of air time...

    Sherman, Tx
    <font color=red>The blazer's almost on the road....anyone got tree fiddy?</font color=red>
     
  14. Boss

    Boss 1/2 ton status Author

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    Here are a few pics of mine.
    http://community.webshots.com/photo/22500047/23057634gUHbkskHlO

    http://coloradok5.com/gallery/BeforeNAfter
     
  15. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    <blockquote><font class="small">In reply to:</font><hr>

    plus the piston rotates inside the shock body, I dont see why they'd ever bind unless you get a lot of air time...

    <hr></blockquote>
    Air time, good. The major problem I have with it, which also includes the stock mounts, there is only one side of the mount bolt supported. Yeah, probably okay for slow speed stuff and the occassionaly high speed oops; but I wouldn't trust it to hold up constantly getting pounded.



    Bubba Ray Boudreaux,
    "It wastes drinking time."<a target="_blank" href=http://community.webshots.com/user/mdntrdr1>http://community.webshots.com/user/mdntrdr1</a>
     
  16. wayne

    wayne 3/4 ton status

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    I am planning on getting the set up from 85. It loos like a good set up and can be adjusted.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  17. azblazor

    azblazor 1/2 ton status Premium Member

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    Where did you get your weld on mounts from?

    <font color=blue>azblazor</font color=blue>
    <font color=orange> 79 K5 454-FI / 4L80E, NP205, D60, FF14, 4" lift, 9K Warn </font color=orange>
     
  18. Thumper

    Thumper 1/2 ton status

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    Frizzlefry,
    How do you get 28" of travel? Is that measured at the wheel? Or the axle? The RS5012s that I put on the front only extended from 19" out to 33". Thats only 14". You must have used even longer shocks.
    Also, was that before or after the springer shackle?

    Thanks for the info.
    Mike


    <font color=blue>Thumper
    85 Fullsize Jimmy
    [​IMG]
    <font color=red>Aint Skeered!! </font color=red>
     
  19. marv_springer

    marv_springer 1/2 ton status

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    Frizzlefry's measurement of wheel travel is at the tire - from full stuff to full droop, probably using the edge of the fenderwell as a reference.

    This amount of travel is made possible by my "Springer" dropping shackle system and the flexible springs that I use - although I must admit that Frizz's truck does exceptionally well because of his "shock mounting" arrangement. By comparison, my truck (the first experimental "Springer" guinea pig) travels about 24" in the rear - and so far every truck that has installed my suspension travels at least this much. One customer has reported 30" of tire movement! - but I'm not sure if he had shocks on it at the time. My rear shocks are 9012's but due to the way they are mounted - they tend to limit the droop a little more than Frizz's.

    Need more info? ... e-mail me..

    Marv
     

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