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The Complete How To Cut Your Stock Springs Thread

Discussion in 'How-To' started by Jefe, Aug 10, 2009.

  1. Jefe

    Jefe Active Member Established Member

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    First and foremost, the reason numerous Cobra owners cut their springs is because the 03/04 Cobras come stock with Linear Springs(What is the definition of linear spring?). That allows us to shorten them without hurting ride quality so long as you dont cut more than 2-3 coils off, which I dont think would be possible with wheel/suspension clearance.

    There are numerous install threads on how to cut the stock 03/04 springs so I thought Id combine them all here and add my tips. Used various steps from each of these installs to get mine done. Feel free to add your own so we can just make this thread all anyone would ever need to get the job done.

    Check these threads to figure out how much you want to cut:

    http://www.svtperformance.com/forums/suspension-modifications-211/547000-lowered-03-04-cobras.html
    (Merged with other Terminator cut springs/lowered pic threads)

    (General lowered Mustangs)
    http://www.svtperformance.com/forum...389-pics-lowered-stangs-cut-springs-only.html
    http://www.svtperformance.com/forum...59157-pictures-lowerd-99-04s-cut-springs.html


    Technical/Info/Install threads on cutting springs:

    http://www.svtperformance.com/forum...tions-211/289160-truth-about-cut-springs.html
    http://www.svtperformance.com/forums/terminator-talk-229/596069-your-opinion-stock-cut-springs.html
    http://www.svtperformance.com/forums/terminator-talk-229/578704-steps-cut-stock-springs.html
    http://www.svtperformance.com/forums/suspension-modifications-211/619929-cutting-springs.html
    http://www.svtperformance.com/forums/how-230/489609-how-lower-your-cobra-cut-coils-method.html
    http://www.svtperformance.com/forum...t-had-alignment-done-after-cutting-coils.html
    http://www.svtperformance.com/forum...9/605351-look-no-more-4x4-lowered-my-car.html
    http://www.svtperformance.com/forums/suspension-modifications-211/600889-cutting-coils.html

    Other sites:

    How To Install An H & R Race Spring 99-04 Cobra
    Kenny Brown Spring Install on 99 Cobra

    Those are all you should need but if not, heres more:

    From my own experience and what Ive seen online, cutting 1/2 a coil will drop your ride height approx .75"-1"; cutting 1 full coil will drop approx 1.75" - 2". Every car is different though, cut less if you aren't sure or maybe remove an iso to get the desired look. You can always cut more off if you want it lower. Something I recommend is measuring your ride height as it sits now from ground to fender on all 4 corners and see if it matches. Mine did not, the passenger side rear sat a little higher, about 1/4". I wound up cutting about 1.5" more coil off that spring to compensate. Now it sits level with the left rear

    My notes:

    Some take their catback off, some are able to take the tip hangers out of the rubber holders and lower the IRS just enough to get the springs off. I took mine off to clean it up anyways. Your call. You will see how much clearance you've got once you start lowering the rear

    Majority will need an alignment after cutting springs. Depends on how much you cut or what bolts/alignment specs you tweaked while doing the removal/install. Get a 4 wheel alignment!


    [​IMG]

    Fronts:

    With a jack under the A-Arm, I was able to get the nut holding on the sway bar off which is underneath the A-Arm, remove the 2 shock bolts and lower the entire assembly which also popped off the rubber spacer under the A-Arm. Take the ABS line out of the double hook, you might also need to remove it from the hook by the shock for more slack when dropping the A-Arm

    If you need to remove the tie rods here's the tool, Checker should have it. Its the smaller of the two that look like this:

    [​IMG]

    The Springs were very tight so using your feet and a crow bar you can get it out by pushing down on the Arm with the crow bar underneath the spring pushing up and out

    Pay attention to how the springs sit in the perch prior to removing them. Putting them back in in a different position can affect your ride height.

    I was able to do the fronts by myself in less than 20 mins for both sides

    [​IMG]


    Rears:

    Very straight forward directions above; I had the springs in less than 15 mins. When doing this you might want to replace the 12mm front IRS bolts with 9/16" Grade 8 Bolts(http://www.svtperformance.com/forums/suspension-modifications-211/331799-12mm-vs-14mm-vs-9-16-a.html) Might as well get AC427Cobras Kit for an even better IRS experience(http://www.svtperformance.com/forum...g-kit-w-adj-sway-bar-links-bumpsteer-kit.html)

    [​IMG]


    Air tool with cutting wheel:

    [​IMG]

    Back together:

    [​IMG]


    Stock:

    32 psi front 30 psi rear

    From ground to fender RF/LF - 27.5"
    From ground to fender RR/LR - 28"

    [​IMG]
    [​IMG]



    After:

    35psi front 25psi rear

    From ground to fender RF/LF - 26.5"
    From ground to fender RR/LR - 26.75"

    [​IMG]
    [​IMG]
    [​IMG]
     
    Last edited by a moderator: Apr 13, 2011
  2. Steve2050

    Steve2050 New Member Established Member

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    Great info. I did the rears late last night, doing fronts tonight. Thanks for the write up.:beer:
     
  3. 03cobra#694

    03cobra#694 You Guys... Staff Member Super Moderator

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    Should help a lot of guy`s out.Good job.:beer:
     
  4. Finaltheorem47

    Finaltheorem47 I'm a Lead Farmer Established Member

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    Absolutely great write up. Thank you very much!

    A little off topic, but how do you decide what pressure's to run in the front and rear tires?
     
  5. Jefe

    Jefe Active Member Established Member

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    My buddy who's been working at Discount Tire for years. He thought the middle of my rear NT05's looked a little worn so he dropped them to 25. Said 95% of tires they put on are 35psi in the fronts so Ill try it for a while and see how the tires look
     
  6. restlessdreams

    restlessdreams :D Established Member

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    Soo......If I cut 1 in front and 3/4 rear........Will I NEED cc plates to align m wheels properly?
    I want to do this while I have my car up on stands, because it needs a saftey, and the wheels need be aligned for the safety..........
     
  7. Jefe

    Jefe Active Member Established Member

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    Ill find out If I need one soon.
     
  8. suaveflooder

    suaveflooder 500 hp grocery getter Established Member

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    It really depends on the car. I just needed them with my H&R's. The alignment guy said that they would have made his job easier if I had had them and that I was just out of being where I needed to be
     
  9. Jefe

    Jefe Active Member Established Member

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    I needed CC plates
     
  10. suaveflooder

    suaveflooder 500 hp grocery getter Established Member

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    Little bit of an update as I got a cool tip from lauri that I used when putting my race springs in recently: (I'm the one who sent Jefe the quick write-up in his origional post). When removing the tie rod end from the sway bar, turn the crown nut upsidedown and set it flush with the top of the tie rod. Hit it with a hammer. No need for a puller. This will give you a flat surface to hit and it pops out fairly easily.
     
    Last edited: Nov 13, 2009
  11. 04svtsnke

    04svtsnke Active Member Established Member

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    How long does it take for the springs to settle after cutting them?
     
  12. ShortThrow50

    ShortThrow50 Always buyin cheap tires Established Member

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    i wouldnt think it would take anymore than an hour since the springs were previously under load and not new springs
     
  13. 04svtsnke

    04svtsnke Active Member Established Member

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    well the whole saying that every car isnt equal as far as cutting is true, i cut mine a full cil in the front and it still sit a lil high for my taste....but what do i know i like the slammed look....guess ill be taking a few more inches of coil off next weekend
     
  14. 03cobrah

    03cobrah New Member Established Member

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    hmm i was just talking to a guy that owned those tires the other day.. he said that at 35 psi they will get worn out in the middle, but i forgot what psi he said to drop them too if my memory serves me correctly it was 15..
     
  15. 04svtsnke

    04svtsnke Active Member Established Member

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    Are any of you havnt tire rub with turning? I have a little bit on my driver wide only, any way to combat it?
     
  16. Jefe

    Jefe Active Member Established Member

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    15psi on a daily driver tire? Seems low...

    When the wheel is fully turned? Not on the Cobra but had that problem on the last GT, just couldnt turn the wheel lock to lock. Had an alignment done?
     
  17. 04svtsnke

    04svtsnke Active Member Established Member

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    Not yet, that may fix my lroblem on my cobra....getting one in a few days
     
  18. geoffw

    geoffw Boost Addict Established Member

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    Cutting springs is GHETTO... Take pride in your nice cobra and give it decent aftermarket springs.
     
  19. Jefe

    Jefe Active Member Established Member

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    Cutting LINEAR springs which come stock on the 03/04 Mustang Cobra is not ghetto its a free mod. Do some research in this thread before making comments like that. There are hundreds of Cobras on this site alone who have cut their springs and are happier with them than they would be with aftermarket springs

    No aftermarket spring has made me happy and this is my 5th Mustang
     
  20. SCT2003

    SCT2003 2012 3.7 & 1986 NOTCH Established Member

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    Nice write up and good info!!!

    Thanks...

    :beer:

    Later...Dave
     

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