Raising Convertible Ride Height

Discussion in 'The whoa and the sway.' started by GSEric69, May 31, 2011.

  1. GSEric69

    GSEric69 Still learnin'

    I'm looking to raise the rear ride height of my 69 Skylark Convertible about an inch or so. Originally I installed a new set of Convertible rear springs in the car when I got it 13 years ago. This got the ride height back to standard position, but I wasn't too happy with the look. Someone later suggested that I put Sportwagon springs in the back to raise it up a little, so I gave it a shot. I got a new set of Sportwagon rear springs and the car sat exactly like it did with the Convertible rear springs in it.
    I ended up putting air shocks in the back, which allowed me to get the height I wanted, but the drive quality is far from where I like it, so I'm back to looking for advice on which springs to use to raise the height so I can put some good shocks in the back.
    Or should I just put in a 1" spacer under the springs to raise it up. Does using the spacer affect the handling at all?

    Thanks!
     
  2. DavidC77

    DavidC77 "Matilda" 1970 Buick GSX

    Get the springs for a full size car, they are a little taller.

    Something like a Century or a full size WG.

    If you get the ones for a car with AC those will sometimes be a little stronger also.

    Good Luck

    :TU:
     
  3. ragtops

    ragtops Gold Level Contributor

    I use spacers under the springs. I generally figure a half inch spacer will raise the car about one inch. Works for me, and ride is not affected.
     
  4. GSEric69

    GSEric69 Still learnin'

    Thanks David,
    So the full size springs fit in without any issues?
     
  5. James McD

    James McD Well-Known Member

    Eric,

    My 69 was a squatter... when I had the 14's with all the same size tire.

    I just recently installed 275x60x15 drag radials in the rear with 235x60x15 in the front. Now it has a slight rake to it, I would think with a slightly shorter tire in the rear it would sit about level... that's what I plan to do when I purchase an all street tire for the rear.

    IMHO, with the wheel well on the 68-69... they can really swallow a taller tire in the rear.

    Just a thought

    James
     
  6. GSEric69

    GSEric69 Still learnin'

    Right now I'm running 235 60 15's on all four corners. Tires are new, so I'm not really looking to replace them right now, but good to know for the future.
     
  7. N360LL

    N360LL milehi71Stage1

    So are you trying to make the ride height the same from front to rear? Or actually raise the car 1" all the way around and retain the rake from factory plus the 1"?

    The A-body has a positive rake from the factory. I posted previously about this question and what the specifications are for a 1971 car. I don't know what the specifications are for an earlier bodystyle car.
     
  8. Ken Mild

    Ken Mild King of 18 Year Resto's

    I installed a set of the ride/handling GSCA coil springs in my car and I am extremely pleased with the look. The car has a slight rake, not the typical half hidden wheel look which I can't stand.
     
  9. GSEric69

    GSEric69 Still learnin'

    I'm looking to raise the rear only. Like Ken said, I'm not too fond of the hidden wheel part in the rear. I think it's the only part of th 68-69 styling I don't really care for. Ken, where do you get the ride/handling GSCA coil springs from?

    I'm looking to get a stance close to the 68 shown here on racerxjj67's car

    [​IMG]
     
  10. Ken Mild

    Ken Mild King of 18 Year Resto's

    Are you a GSCA member? They advertise them in the GSXtra, their bi monthly publication. They've had them for sale for at least 20 years now.

    http://www.buickgsca.com/

    Someone on here might even have a set.
     
  11. Ken Mild

    Ken Mild King of 18 Year Resto's

    That's just about exactly where mine stands. Mine MIGHT stand a half inch lower but I know most of my sidewall shows.
     
  12. GSEric69

    GSEric69 Still learnin'

    Ken, No I'm not currently a GSCA member. Been thinking about joining.
    Do you think the springs will provide the same ride height to a convertible as a hard top, or do they offer convertible specific springs?
     
  13. DavidC77

    DavidC77 "Matilda" 1970 Buick GSX


    Ya they work fine.

    I think it was my old 71 GS that I did it on. FS springs on the front and rear and 15 rim's and tires.

    Worked out good.
     
  14. DavidC77

    DavidC77 "Matilda" 1970 Buick GSX


    I just looked through the NAPA catalog

    http://ecatalograck.genpt.com/pdfca...kin/entrymap/entrymap_napa.asp?SkinId=7.2.1.1

    And about the only thing they show on the rear as a difference is regular spring or heavy duty spring or variable rate spring.

    So for the rear there is no difference, there is a difference in the front, but, that is mostly with AC or with out AC.
     
  15. 87GN_70GS

    87GN_70GS Well-Known Member

    5399 should be an inch higher than stock
    5381 should be about 1.75" higher
    CC627 should be about 2" higher
    5395 should be about 2.5" higher

    These are Moog part numbers
    G-body springs are roughly 2" higher than A in the rear
     
  16. DavidC77

    DavidC77 "Matilda" 1970 Buick GSX


    Scott are those numbers that you list the numbers for the G-Body ???

    I need to replace my F&R springs at some point and those numbers will help me out a lot as to what I want to do, thanks.
     
  17. 87GN_70GS

    87GN_70GS Well-Known Member

    5399 is from an el-camino
    5381 is g-body
    cc627 is g-body
    5395 is b-body
     
  18. DavidC77

    DavidC77 "Matilda" 1970 Buick GSX


    OK Thanks.
     
  19. mtdman

    mtdman Well-Known Member

    Do what I did, call Detroit Eaton Spring and tell them what you want to do. I asked for springs that would raise the car about an inch and they custom made them for me. Good customer service.
     
  20. stageonelarry

    stageonelarry Member

    you can put higher tires in the rear 635-70-14 or go to 15"wheels in rear
     

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