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Questions/Details for 1st Gen 63 Swaps

Discussion in 'Suspension' started by PathFinder1776, Sep 3, 2024.

  1. Sep 3, 2024 at 9:01 AM
    #1
    PathFinder1776

    PathFinder1776 [OP] Well-Known Member

    Joined:
    Aug 23, 2021
    Member:
    #375045
    Messages:
    197
    Gender:
    Male
    Colorado Front Range
    Vehicle:
    2003 DCSB TRD OR 4WD
    TRD S/C & TRD Boost Gauge Snugtop Topper Chevy 63 Swap, Gen 1 Raptor Shocks Boxed rear frame Aluminum F/R bumpers, sliders AEM 340 Fuel Pump Odyssey 27F Battery Shifted LCAs UCAs Icon 2.5 Ext. Coilovers
    Just (mostly) finished up the 63 swap on my 2003 DC and so far I'm regretting it a bit. There are a few details that aren't ideal so I'm looking for a sanity check.
    Pictures are attached. Front hangers are frenched into the frame 7/8". Shackles are 5". I didn't check ride height too well during placement, just estimated. Shackle angle at ride height is 35 degrees, which seems a little shallow. They end up just shy of 90 at full forced droop and don't go flat against the frame at full compression. Bump was set to keep the springs from going much past flat, and the shocks were set there as well.
    Much of the issue is that the Raptor shocks are very stiff at the bottom of their travel, but that's a separate problem that will be addressed with valving and one or two more free bleed holes in the bypass tube. Even with just 100 PSI in the gas chamber they ride like a one ton currently...The springs move very freely and feel great, but where ride height ended up on the shocks they're absurdly stiff. The shocks could have been set at more of an angle or with the lower mounts 2" down, but with packaging and compressed/extended capability everything matches up really well where they are now.
    Back to the springs...There is only about 4" of up travel, including bump compression, before the springs go flat. Total travel is a little over 12". There are 4 springs in the pack currently. The pack was from a 1 ton truck, the overload and leaf above the bottom one with the retainers were excluded. Do these numbers seem reasonable? It gave around 4-5" of rear lift, which is more than planned, but going lower would really restrict up travel. I don't mind the rake but it is a little excessive. Would a shorter shackle and steeper shackle angle be the way to go? Maybe french the shackle hanger in as well? At this point I'm thinking it will go back to a J59 pack or get linked in the future.

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    Xero likes this.
  2. Sep 4, 2024 at 7:47 AM
    #2
    PathFinder1776

    PathFinder1776 [OP] Well-Known Member

    Joined:
    Aug 23, 2021
    Member:
    #375045
    Messages:
    197
    Gender:
    Male
    Colorado Front Range
    Vehicle:
    2003 DCSB TRD OR 4WD
    TRD S/C & TRD Boost Gauge Snugtop Topper Chevy 63 Swap, Gen 1 Raptor Shocks Boxed rear frame Aluminum F/R bumpers, sliders AEM 340 Fuel Pump Odyssey 27F Battery Shifted LCAs UCAs Icon 2.5 Ext. Coilovers
    Did some valving work last night and that has helped a bit. It still leaves very little up travel but helps with the ride. After hunting season when there's some spare time I'll move the lower shock mounts down about and inch to move the shocks up above one more bleed hole at ride height.
    Still looking for some numbers to compare on up travel on others' 1st gen 63 setups.
     
  3. Sep 4, 2024 at 7:54 AM
    #3
    Speedytech7

    Speedytech7 Toyota Cult Ombudsman

    Joined:
    Feb 20, 2014
    Member:
    #123587
    Messages:
    57,609
    Gender:
    Male
    FCQM+VG Cheney, Washington
    Vehicle:
    96 Turbo Taco V6 405WHP & 482lbft
    It's less Tacoma and more mod
    Just seems like it needs a little tweaking, 4 leafs might be a bit much for an unloaded first gen, I only use three on a loaded one haha. I don't know the specs on those shocks but I'd assume without going through the bed it'll be hard to get all of your travel like it is on mine. I think you're bumping too low as well looking at your bump cans coming off the frame. I let the bastards come up and I'm gonna remove my one inch bump spacer too now that I'm moving my shocks to another location.

    Keep in mind my wheel arches are cut 1.5" higher all around over stock and that's a 35" tire.
    2024-09-04_07-53-29.jpg
     
  4. Sep 4, 2024 at 8:11 AM
    #4
    PathFinder1776

    PathFinder1776 [OP] Well-Known Member

    Joined:
    Aug 23, 2021
    Member:
    #375045
    Messages:
    197
    Gender:
    Male
    Colorado Front Range
    Vehicle:
    2003 DCSB TRD OR 4WD
    TRD S/C & TRD Boost Gauge Snugtop Topper Chevy 63 Swap, Gen 1 Raptor Shocks Boxed rear frame Aluminum F/R bumpers, sliders AEM 340 Fuel Pump Odyssey 27F Battery Shifted LCAs UCAs Icon 2.5 Ext. Coilovers
    Thanks for the input! I debated on the 4 leafs but several others had 4 on here and the spring rate feels pretty reasonable. I thought it was going to be really plush prior to installing the shocks from the feel of just the springs.
    You're letting them go well beyond flat then at full compression? After thinking about it a bit it makes sense with these springs, it's not like they're a $1k Deaver pack, replacing them isn't a big deal if they lose their arch. The shocks are a 11.5" stroke. Right now they can use all of their up travel but would only use all of their down travel under extreme articulation. Once I move the mounts down (closer to where yours are it looks like) it will give more up travel, less of the down travel it's very unlikely to use, and I'll cut down the bump cans. That should optimize it a bit better.
    My tires are 35s as well, and they still have a ways to go up before hitting the factory wheel well location. After seeing yours it's looking like my bumps need to be able to go up more for sure. Thanks!
     
    Speedytech7[QUOTED] likes this.

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