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isuzu impulse rear springs?

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  • isuzu impulse rear springs?

    Hey guys I was just wondering your in put on a set of springs for the rear for my car , I already have fms springs but I won't stuffer springs.
    I was looking on moogs web site and p/n cc631 witch is rear springs for a 83-88 isuzu impulse, if they would work. The specs are i/d of spring 3.881
    wire dia .473 free height is 13 install height is 9.75 load is 390 and spring rate is 120lbs. oh and they are tangential springs.

  • #2
    You'll never get Impulse springs in there! OEM Festy and Aspire rear springs have an outside diameter of 3 7/8 inches and fronts are OD 4 3/16 inch (just now I went out and measured up a set). They have to be 'flat' across the top and do have to fit within the rear 'pocket' but I have heard tell of people installing front springs in the rear. Haven't tried it myself. But Impulse 3.9 + .47 + .47 = 4.85 in. is guaranteed way too big.
    If front to back swaps are possible you might want to try out a set of Rio front springs.

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    • #3
      thanks for the help i will start looking up rio front springs

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      • #4
        If no one on this forum answers in the affirmative about front to rear spring swaps then maybe you want to carve a piece of wood or else find a 4 + 1/4" cylinder for trial just to see if something in that size will actually fit in the arse end of a Festy. My 2 year experience with FMS springs is now over and if you say you want stiffer ones than that then all power to you. But I personally don't want to wear a kidney belt when driving.

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        • #5
          Originally posted by dragsterdave View Post
          thanks for the help i will start looking up rio front springs
          Don't bother to 'look up' Rio springs. Grab your work clothes, metric sockets, wrenches, large hammer and drift punch and visit the local U-Pull. Two stiff bolts on the lower end of the strut to remove and two easy ones up top. Take it easy (ie be very careful) when you go to release the central nut on the upgrade bearing-driven 'top hat' (you'll want to keep that 'miracle improvement' part) once you get the spoils back home. Kill two birds with one stone. Pillar springs in the back and poor man's power steering in the front.

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          • #6
            Im going to pick n pull this weekend , but before I do im reading up on 85 ford escort springs p/n moog cc832 .

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