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Spring Pack Question

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by Roostr84, Apr 25, 2001.

  1. Roostr84

    Roostr84 1/2 ton status

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    Ok, here is my query. I know there is a regular and HD option on the suspensions. What is with all the different combinations though. I have 2 leafs up front and five in the rear. Some people have 3 up front and four in the rear or other combos. Can anybody clarify wht the differences were between the spring pack options.
    Thanks,
    Chris
     
  2. Burt4x4

    Burt4x4 3/4 ton status

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    It all boils down to Ride and Cost.
    Like the custome packs that National Spring make are 6 to 8+ leafs and are 500+ bucks per pack!!
    Then you can get cheap packs with 3 leafs that ride very stiff.
    Not all 3 leaf packs are cheap but will ride harsh.
    Hope this helps.

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  3. Roostr84

    Roostr84 1/2 ton status

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    Yeah i understand that. So are you just refering to aftermarket or replacement springs. i was refering more to stock. i could understand if someone had less in back if they didnt get the hardtop but who really didnt get the hardtop ya know what i mean.
     
  4. arq

    arq 1/2 ton status

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    I know the front HD option had 3 leafs. sdt duty had 2 leafs. As for the back it could be the rear seat option or even maybe the tire size.

    my 2 centavos...

    ARQ.
     
  5. Roostr84

    Roostr84 1/2 ton status

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    I never thought of that ARQ. I think ill keep those centavos =)
     
  6. Burt4x4

    Burt4x4 3/4 ton status

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    Oh sorry, yes I was refering to the aftermarket. Duno what GM did back then or why....

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  7. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    I spent some time studying this topic and I can tell you that as a general rule of thumb, if the springs are the same overall length, width and pack thickness.....the more leaves, the softer the spring rate will be. (each individual leaf in the pack is thinner as you increase the number of leaves) National Springs have a tremendous number of leaves per pack, which must make them a VERY soft riding spring. I'm still hoping to find a local K5 owner with a National spring setup so I can check out the ride first-hand.

    I have the formulas that will let you calculate your own spring rates, so that you could compare what you have, to what you are considering purchasing.

    FWIW -&gt; I have an aftermarket set of Rough Country Springs on my '72 K5. The fronts are a 3-leaf pack, and they are STIFF!!! It feels like the front tires come off the ground every time I hit a bump.....and I only have a single-shock setup. [​IMG]

    -Greg72
     

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