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    Results 1 to 14 of 14
    1. #1
      Join Date
      Mar 2006
      Location
      OC CA
      Posts
      470

      De-arching Leaf Springs To Lower?

      Well, I think I ordered the wrong springs from G/W. (or they sent me the wrong ones) Purchased new 2 years ago and I own them now. The car handles and drives well, but it is too high in the rear. Especially with my 25+" tires. Just doesn't look right. (stinkbug effect LOL)

      So, I'd like to not have to buy new ones or use lowering blocks, and thought of de-arching them using a local spring shop (Deaver spring?)

      Any downsides to this if done properly?

      If not, I'll just have to order new,.
      It's only money right?
      Thanks

      Mark
      LS1- T56
      under construction
      "Political Correctness is a doctrine, fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."


    2. #2
      Join Date
      Mar 2006
      Location
      OC CA
      Posts
      470
      I'm thinking 2" lower.

      What'cha all Think?



      Mark
      LS1- T56
      under construction
      "Political Correctness is a doctrine, fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

    3. #3
      Join Date
      Aug 2004
      Location
      Surrey, BC, Canada
      Posts
      20
      Deffo lower it...looks like a 4X4...lol
      Nordschleife, there's only two barriers to worry about - the ones on the left and the ones on the right

    4. #4
      Join Date
      Mar 2006
      Location
      OC CA
      Posts
      470
      Ya right

      The Q is not IF I should, but by how much and..............anyway thank you Captain obvious LOL j/k
      Mark
      LS1- T56
      under construction
      "Political Correctness is a doctrine, fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

    5. #5
      Join Date
      Mar 2005
      Location
      Sterling Heights
      Posts
      91
      It would be nice to have the picture with the front wheels strait.
      Also I suggest that you put all the hardware on the car. The one pic didn't have paint and the other does, so is the rear window and trunk lid in place? I see the bumper is back on. In other words, make sure you have all the weight back on the vehicle or put weights in the car to simulate the interior parts, etc. Then look at the spacing on the front and rear wheels to the fenders.

      I ran into a shock problem and Koni was nice to suggest that I get the vehicle completely assembled, then we can determine the right length shock. So I'll assemble, adjust the springs if needed, then order the shocks.

    6. #6
      Join Date
      Aug 2004
      Location
      CHICAGO SUBURBS
      Posts
      761
      Also put all the weight back in the car and let it settle. You will want to loosen and retighten the sping bolts at ride height. If you don't do these things you'll probably end up too low.

    7. #7
      Join Date
      Dec 2006
      Location
      Out of the Burbs of Detroit to SoCal, then onto my ancestral homeland, the woods of Cascadia
      Posts
      1,753
      Country Flag: United States
      Used Deaver on my MG race car when i lived in Garden Grove- Quality was OK, not super, but OK

      As far as de-arching, remember that arc does affect spring rate. Are you happy with the rate, jsut don't like the look? It looks like it's not on the road yet....

      If rate's OK, maybe try reversing the spring eyes to bring the rear down?

    8. #8
      Join Date
      Aug 2004
      Location
      Rustburg, Virginia
      Posts
      3,436
      Country Flag: United States
      Quote Originally Posted by Twentyover
      maybe try reversing the spring eyes to bring the rear down?
      20+,
      Can't do that on a second gen, the spring eyes are different, and the springs are not symetrical so they won't turn around and position the axle in the same location under the car, also the GW springs are clamped closer together at the front to help prevent wheel hop and axle wrap. Good thought though.
      1970 RS/SS350 139K on the clock:
      89 TPI motor w/ 1pc rear seal coupled to a Viper T56 via Mcleod's modular bellhousing w/ hydraulic T/O bearing from the Viper, 12 bolt rear w/ 3.73 gearing, SC&C upper control arms, factory lowers with Delalums, C5 brakes at all four corners, Front Wheels 17x8's with Sumi 255/40/17 and Rear Wheels 17x9's with Sumi 275/40/17.
      Brief description of the work done so far can be found here: http://www.nastyz28.com/forum/showthread.php?t=112454


    9. #9
      Join Date
      Aug 2004
      Location
      Rustburg, Virginia
      Posts
      3,436
      Country Flag: United States
      I didn't see any traction bars or Slide-a links, so you could do a combination of several things to bring the rear down while retaining the current springs.

      >The Herb Adam's mod will net about 3/8" drop,

      > and then you could run a small lowering block(<1"),

      >and then if more drop is needed you could pick up some additional drop with a set of adjustable position shackles.

      Might not get all of that height out of the rear but should help you deal with what you have.
      1970 RS/SS350 139K on the clock:
      89 TPI motor w/ 1pc rear seal coupled to a Viper T56 via Mcleod's modular bellhousing w/ hydraulic T/O bearing from the Viper, 12 bolt rear w/ 3.73 gearing, SC&C upper control arms, factory lowers with Delalums, C5 brakes at all four corners, Front Wheels 17x8's with Sumi 255/40/17 and Rear Wheels 17x9's with Sumi 275/40/17.
      Brief description of the work done so far can be found here: http://www.nastyz28.com/forum/showthread.php?t=112454


    10. #10
      Join Date
      Nov 2005
      Location
      Auburn, WA
      Posts
      1,360
      Don't even think about touching the springs until the car is FINISHED. Now is not the time to worry about that.
      Matt Jones
      Mechanical Engineer
      Art Morrison Enterprises

    11. #11
      Join Date
      Aug 2004
      Location
      Rustburg, Virginia
      Posts
      3,436
      Country Flag: United States
      I agree, 20 gallons of fuel and all the window glass put back in will make a big difference in the ride height.
      1970 RS/SS350 139K on the clock:
      89 TPI motor w/ 1pc rear seal coupled to a Viper T56 via Mcleod's modular bellhousing w/ hydraulic T/O bearing from the Viper, 12 bolt rear w/ 3.73 gearing, SC&C upper control arms, factory lowers with Delalums, C5 brakes at all four corners, Front Wheels 17x8's with Sumi 255/40/17 and Rear Wheels 17x9's with Sumi 275/40/17.
      Brief description of the work done so far can be found here: http://www.nastyz28.com/forum/showthread.php?t=112454


    12. #12
      Join Date
      Mar 2006
      Location
      OC CA
      Posts
      470
      Quote Originally Posted by Twentyover
      Used Deaver on my MG race car when i lived in Garden Grove- Quality was OK, not super, but OK

      As far as de-arching, remember that arc does affect spring rate. Are you happy with the rate, jsut don't like the look? It looks like it's not on the road yet....

      If rate's OK, maybe try reversing the spring eyes to bring the rear down?
      I hadn't considered changes in spring rate. I am happy with the current rate although there are only limited (75?) miles of running around on the car, and I haven't run it too hard yet.
      It's not being driven yet. How would I expect spring rate changes? stiffer or softer?

      Quote Originally Posted by John Wright
      I didn't see any traction bars or Slide-a links, so you could do a combination of several things to bring the rear down while retaining the current springs.

      >The Herb Adam's mod will net about 3/8" drop,

      > and then you could run a small lowering block(<1"),

      >and then if more drop is needed you could pick up some additional drop with a set of adjustable position shackles.

      Might not get all of that height out of the rear but should help you deal with what you have.
      Not yet, I do plan on Cal-tracks, or some sort of traction device to control wheel hop.
      Herb Adams mod! good idea!, but I will stay away from L/blocks if I can.
      Adjustable position shackles? My current ones are also GW, and have only about 5/8" clearance between rear spring eye and frame rail now, so I can't see too much gain there considering a 1 inch shackle length change will usually only net you about a 1/2" change in ride height.Though, I do see the logic in getting the drop from a combo of small increments in different areas.
      How close can I run the rear spring eye to the frame rail?


      Quote Originally Posted by silver69camaro
      Don't even think about touching the springs until the car is FINISHED. Now is not the time to worry about that.
      Probably the wisest advice I could take right now!
      I am blowing the rear of the car apart in prep. for body work and was hoping to get the ride height issue resolved while it's apart, but it really is just a matter of having to re-install them yet again, so I should probably be used to that by now.LOL

      Just to be clear, The pics with paint on the 1/4's were taken with 3/4 tank of fuel, batt. in the trunk, bumper, lighting, etc. But, with no interior or rear glass.
      On level ground, I have aproximitely 5 1/2" ground clearance to the lowest point of my subframe connectors, which are level with the front subframe. So, the car sits about stock height with 2" (?) loweing springs and 1" smaller tire diameter! I think ordered (got?) the wrong springs.

      Also, a 25" tire seems a little small for the w/wells anyway, and I think it adds to the visual problem.

      BTW, anyone else know something about the original question?

      Thanks guys for all the good info!

      I think m
      Mark
      LS1- T56
      under construction
      "Political Correctness is a doctrine, fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

    13. #13
      Join Date
      Aug 2004
      Location
      Rustburg, Virginia
      Posts
      3,436
      Country Flag: United States
      GW springs are designed to help with wheel hop. As for the Slide-a links, by raising the front eye , it may pose a clearance problem with the Slide-a-links...I'd research that a bit before laying out the cash for those.
      1970 RS/SS350 139K on the clock:
      89 TPI motor w/ 1pc rear seal coupled to a Viper T56 via Mcleod's modular bellhousing w/ hydraulic T/O bearing from the Viper, 12 bolt rear w/ 3.73 gearing, SC&C upper control arms, factory lowers with Delalums, C5 brakes at all four corners, Front Wheels 17x8's with Sumi 255/40/17 and Rear Wheels 17x9's with Sumi 275/40/17.
      Brief description of the work done so far can be found here: http://www.nastyz28.com/forum/showthread.php?t=112454


    14. #14
      Join Date
      Dec 2006
      Location
      Phoenix, AZ
      Posts
      1,265
      Country Flag: United States
      The guys at Deaver are great and will take very good care of you, we use them all the time and have not had anyproblems. The car will ride great if it is done right. But dont take too much out of them as when you add all the weight gas/windows/system and so on it will settle a little, not as much as you probably want but it will come down. Send pics of your car to Deaver and figure out how much weight you are adding and they can help you figure out how much to take out. Thing you need to consider is what will a new set cost you as to de-arching them and for a little more money a 4 link would be the way to go. Good luck


      Quote Originally Posted by 70bird
      Well, I think I ordered the wrong springs from G/W. (or they sent me the wrong ones) Purchased new 2 years ago and I own them now. The car handles and drives well, but it is too high in the rear. Especially with my 25+" tires. Just doesn't look right. (stinkbug effect LOL)

      So, I'd like to not have to buy new ones or use lowering blocks, and thought of de-arching them using a local spring shop (Deaver spring?)

      Any downsides to this if done properly?

      If not, I'll just have to order new,.
      It's only money right?
      Thanks
      Last edited by Fesler built; 03-01-2008 at 04:51 AM.
      Chris Fesler




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