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rear suspension problem #789605
08/31/10 09:40 PM
08/31/10 09:40 PM
Joined: Oct 2004
Posts: 1,060
Ball Ground GA
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TrueTripleX Offline OP
super stock
TrueTripleX  Offline OP
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Ball Ground GA
Car is a 69 Coronet R/T convert. The car has Dynamat and Dynapad installed throughout the car. The trunk has been completely boxed in with carpet and extra insulation for sound deadening. Even with heavy duty NEW rear leaf springs, the car sags. The springs are almost flat. I am sure that it is from the extra weight (estimate 500-600 pounds). What would you suggest to improve ride height and handling.

Last edited by TrueTripleX; 09/01/10 04:12 PM.
Re: rear suspension problem [Re: TrueTripleX] #789606
08/31/10 10:03 PM
08/31/10 10:03 PM
Joined: Aug 2003
Posts: 12,291
Kent, Wa
340SHORTY Offline
Truck Nut
340SHORTY  Offline
Truck Nut

Joined: Aug 2003
Posts: 12,291
Kent, Wa
load leveler shocks

air bags

heavier duty springs


I am truckless..
Re: rear suspension problem [Re: 340SHORTY] #789607
08/31/10 10:40 PM
08/31/10 10:40 PM
Joined: Jan 2003
Posts: 5,791
Hamilton, Ontario Canada
Magnum Offline
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Magnum  Offline
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Hamilton, Ontario Canada
To correct ride height, get the springs rearched or buy new ones.

To improve handling, you need a stiffer spring. Again new ones, with a higher spring rate. Or add a leaf to your old stack.


69 Super Bee, 93 Mustang LX, 04 Allure Super
Re: rear suspension problem [Re: Magnum] #789608
09/01/10 01:57 PM
09/01/10 01:57 PM
Joined: Oct 2004
Posts: 1,060
Ball Ground GA
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TrueTripleX Offline OP
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TrueTripleX  Offline OP
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Ball Ground GA
Quote:

To correct ride height, get the springs rearched or buy new ones.

To improve handling, you need a stiffer spring. Again new ones, with a higher spring rate. Or add a leaf to your old stack.


As mentioned, the springs on the car are brand new HD from Mopar. not sure that rearching will help and i don't know who would have some "super HD" springs. Any and all help will be appreciated

Re: rear suspension problem [Re: TrueTripleX] #789609
09/01/10 05:12 PM
09/01/10 05:12 PM
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Pikes Peak Country
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TC@HP2 Offline
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Pikes Peak Country
mopar springs are designed to be in a nearly flat position when installed, so they are doing exactly what they are supposed to do. The flatness of them is actually a greater benefit to handling than having a high arch.

If you want additional ride height or load capacity out of them, they would need to be custom built for that purpose. Since you already have them in, you can add a leaf to get a couple more inches of lift from them for arond $50, or you can buy a new set for another $200-250 with additional arch built in them. Best source of these would be Espo.

Re: rear suspension problem [Re: TC@HP2] #789610
09/01/10 11:47 PM
09/01/10 11:47 PM
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Red Lion, PA USA
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scamper340 Offline
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Red Lion, PA USA
Have you looked at adjustable front spring hangers, I'm assuming they make them for B-bodies. Or could you possibly flip the front hangers? Not versed in B-bodies, but I've heard of guys doing it on A-bodies to gain some height.

Re: rear suspension problem [Re: scamper340] #789611
09/02/10 09:05 AM
09/02/10 09:05 AM
Joined: Dec 2005
Posts: 1,495
Shelby mi.
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JAKE68 Offline
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Shelby mi.
I have done alot of customers cars with new mopar springs. They do seem to be lower than maybe some of the originals. Since the customers usually had larger tires than stock on the back they need more clearance so i just had them rearched 2 inches and they work perfect.


JAKES AUTOMOTIVE
Re: rear suspension problem [Re: TrueTripleX] #789612
09/02/10 12:00 PM
09/02/10 12:00 PM
Joined: Jan 2003
Posts: 5,791
Hamilton, Ontario Canada
Magnum Offline
master
Magnum  Offline
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Hamilton, Ontario Canada
Quote:

Quote:

To correct ride height, get the springs rearched or buy new ones.

To improve handling, you need a stiffer spring. Again new ones, with a higher spring rate. Or add a leaf to your old stack.


As mentioned, the springs on the car are brand new HD from Mopar. not sure that rearching will help and i don't know who would have some "super HD" springs. Any and all help will be appreciated




You asked 2 questions. Ride height and handling.
Rearching them WILL give you more ride height without changing the srping rate. Is that what you want?
Since you mentioned you've added 500 lbs (which sounds like alot BTW). Adding a leaf will increase the spring rate. This will improve your handling and that is a common practice when carring more load.

Rearch = ride height.
Add spring = add spring rate.

Flipping the front hanger is about 1/2" higher.


69 Super Bee, 93 Mustang LX, 04 Allure Super






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