Moog 5401 springs.

Discussion in 'Race car chassis tech' started by Da Torquester., Sep 23, 2015.

  1. Da Torquester.

    Da Torquester. Platinum Level Contributor

    Anyone using the moog 5401 rear springs ? How's the ride height, traction, street handling, and hook at the track ? Thx,John.
     
  2. Da Torquester.

    Da Torquester. Platinum Level Contributor

  3. Da Torquester.

    Da Torquester. Platinum Level Contributor

    Really? I find it amazing. No one uses these. :(
     
  4. Bigpig455

    Bigpig455 Fastest of the slow....

    If it makes you feel any better, I went and looked at the moog # for the springs I bought a few years ago, and they were 6204's for the front....wanna talk about 6204's?
     
  5. Da Torquester.

    Da Torquester. Platinum Level Contributor

    Hi, thx for responding. I do have 6204s up front. I have 5379s in the rear. Was curious if anyone has used 5401s in the rear for better street / strip traction.
     
  6. Bigpig455

    Bigpig455 Fastest of the slow....

    I've always just used whatever really beat springs that came with the car, even grabbed A-body springs my friends were throwing away. It seems the factory springs weakened pretty quick and the ass end of these cars would sit right on the axle....even in the promotional photos brand new!

    But no, never tried the 5401's - what's the actual application for them?
     
    Dano likes this.
  7. ShadyLane

    ShadyLane Active Member

    Yes I've used them. I've alternated between 5401 and 6321 depending on tire diameter to get the ride height/suspension geometry I want. You can fine tune either by installing/removing the rubber isolators. 6321 is about 1" taller. traction good - maybe a little soft on the spring rate.

    [TABLE="width: 762"]
    <colgroup><col span="3"><col><col><col><col><col></colgroup><tbody>[TR]
    [TD] PN[/TD]
    [TD]inside dia[/TD]
    [TD]bar dia[/TD]
    [TD] spring rate[/TD]
    [TD]free height[/TD]
    [TD]weight on rear spring[/TD]
    [TD]compression distance[/TD]
    [TD] installed height[/TD]
    [/TR]
    [TR]
    [TD="align: right"]5379[/TD]
    [TD="align: right"]5.57[/TD]
    [TD="align: right"]0.562[/TD]
    [TD="align: right"]121.5[/TD]
    [TD="align: right"]14.75[/TD]
    [TD="align: right"]550[/TD]
    [TD="align: right"]4.53[/TD]
    [TD="align: right"]10.22[/TD]
    [/TR]
    [TR]
    [TD="align: right"]5401[/TD]
    [TD="align: right"]5.58[/TD]
    [TD="align: right"]0.531[/TD]
    [TD="align: right"]129[/TD]
    [TD="align: right"]13.15[/TD]
    [TD="align: right"]550[/TD]
    [TD="align: right"]4.26[/TD]
    [TD="align: right"]8.89[/TD]
    [/TR]
    [TR]
    [TD="align: right"]5409[/TD]
    [TD="align: right"]5.52[/TD]
    [TD="align: right"]0.554[/TD]
    [TD="align: right"]143[/TD]
    [TD="align: right"]13.44[/TD]
    [TD="align: right"]550[/TD]
    [TD="align: right"]3.85[/TD]
    [TD="align: right"]9.59[/TD]
    [/TR]
    [TR]
    [TD="align: right"]6319[/TD]
    [TD="align: right"]5.58[/TD]
    [TD="align: right"]0.531[/TD]
    [TD="align: right"]119.2[/TD]
    [TD="align: right"]14.17[/TD]
    [TD="align: right"]550[/TD]
    [TD="align: right"]4.61[/TD]
    [TD="align: right"]9.56[/TD]
    [/TR]
    [TR]
    [TD="align: right"]6321[/TD]
    [TD="align: right"]5.58[/TD]
    [TD="align: right"]0.531[/TD]
    [TD="align: right"]119[/TD]
    [TD="align: right"]14.29[/TD]
    [TD="align: right"]550[/TD]
    [TD="align: right"]4.62[/TD]
    [TD="align: right"]9.67[/TD]
    [/TR]
    [TR]
    [TD="align: right"]5385[/TD]
    [TD][/TD]
    [TD="align: right"]0.562[/TD]
    [TD="align: right"]168[/TD]
    [TD="align: right"]12.6[/TD]
    [TD="align: right"]550[/TD]
    [TD="align: right"]3.27[/TD]
    [TD="align: right"]9.33[/TD]
    [/TR]
    </tbody>[/TABLE]
     
  8. Bigpig455

    Bigpig455 Fastest of the slow....

    Great chart! Thanks for the info!
     
  9. Da Torquester.

    Da Torquester. Platinum Level Contributor

    Wow ! Thank you. That's help for me. Much appreciated. :TU: Seems like the 6321 might be better than what I'm using now. I installed the 5379s. Not sure yet how they'll do at the track. Only thing is they increased the front to rear angle a little on my lower trailing arms, which I've been told hurts traction. The ride seems ok though. Just continuing to look for better street/strip traction. John.
     
  10. ShadyLane

    ShadyLane Active Member

  11. Bigpig455

    Bigpig455 Fastest of the slow....

    Amazon has them for 58.00, but you should be able to talk your local Napa down to 50 or so....
     
  12. Gary Bohannon

    Gary Bohannon Well-Known Member

    Just discovered this old thread.
    I have 5379 on my car now. These give me the tire clearance and give good traction.
    I have 6321 and 5401 and cc501 springs on the shelf.
    5401 and cc501 sat low. cc501 is a firm cargo spring.
    6321 is a little softer and shorter than 5379.
    Anybody need springs?
     
    Dano and ravensbud like this.
  13. ravensbud

    ravensbud Silver Level contributor

    Yup...CC501 are as low or lower than stock. Saggy rear. I've been using a 1" spacer on the street, but don't want to use it at the track. The spacer wobbles on the spring seat and it just doesn't seem right. Thanks for your other threads, Gary. I'll get it figured out yet...
     
  14. mikethegoon

    mikethegoon Well-Known Member

    I just pulled car out of the shop. Had then install repop box control arms+ 53-- Don't remember if they are 5397 or 5379, Had to get springs off eBay cause conterguy at auto store I work at said they were on backorder. Compared to springs on car was at least 3 in maybe more taller. Control arm bushings didn't have that pad of cushion I expected and when locked down u had to look and see if inner tube was in contact with rearend brackets. Kind of soft in recoil - mushy better describing it. It has raised the car tho. 2 in probably. The way it was before I could barely fit my arm under car to ty up lead pipe when it cracked off. Now 69 car has poly control arms + tubular upper but is stiff and on bumpy roads you feel every rise on pavement. Its always something ...
     
  15. 71gs3504sp

    71gs3504sp Well-Known Member

    I just installed CC501 in the rear of my 72 GS455, it was way beefier than the original. I believe it will settle a little in the rear, the front is still has the original, but will be replace this year.

    72GS455-Rear-End-Done 010.JPG
     
  16. mikethegoon

    mikethegoon Well-Known Member

    What is CC - comfort coil? My rear had to hang down and still we pulled it down more to get spring in. The lower arms came right out But I had been soaking them.The thickness of bushings on OG. Might be the difference.
     
  17. 71gs3504sp

    71gs3504sp Well-Known Member

    CC501 is a progressive spring. I believe CC is for Cargo Coil, I thing they are used for wagons.
     
    Dano likes this.
  18. Dano

    Dano Platinum Level Contributor

    Exactly - Cargo Coil
     
    71gs3504sp likes this.
  19. Da Torquester.

    Da Torquester. Platinum Level Contributor

    Anyone have any results with these rear coil springs ? I have the 5379s but haven't been to the track to see how they affect traction. As far as traction on the street, forget it.
     
    mikethegoon likes this.
  20. mikethegoon

    mikethegoon Well-Known Member

    They ought to take a poll. Those who want height- or those that need a little firmer. I can't imagine what a big block car would do. I asked a swap guy for springs but I ain't laying under a car swapping until I find a pair I want. I'm more interested in cruising The difference between stock and 5379 spring It liked like it wasn't gonna go in. Took off shock lower - still had to pull it down Surprised didn't pull off line to brake tee. Last time I replaced that hose I picked longest I could find
     
    Last edited: May 23, 2020

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