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Old Sep 23, 2006 | 10:10 AM
  #1  
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Default Suspension woes

Heres my current setup

VBP 460lb springs with a coil cut per spring
KYB shocks (all the way around)
Stock steel leaf

The car rides really nice on FLAT ROADS, unfortunatley, I'm in the northeast where plows leave potholes in their wake, the towns cut into the street to connect new homes to public water systems and the new pavement shrinks giving it a concave dip in the road.

The problem that lays is, it feels like the *** end of the car has no travel at all, I go over a bump and the rear feels like its going to shoot up in the air. I didnt have this problem till after I put the KYBs on, it rode fairly well with whatever I had on before (no name cheapies)

Do I swap the kybs out or is there something with my spring thats freezing up?
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Old Sep 23, 2006 | 10:16 AM
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Some shock rear spring combo's can cause that...I'm running Bilstein Sports/new 7 leaf and hitting bumps at speed not an issue..very stable..but harsh...bet your rear suspension is stiff like mine..

Last edited by rihwoods; Sep 23, 2006 at 10:19 AM.
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Old Sep 23, 2006 | 11:32 AM
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You've got a definate imbalance between your front and rear spring rates. Ditch that stock steel POS and get a good composite spring in the 330#-360# range.
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Old Sep 23, 2006 | 11:55 AM
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whats the stock spring rate for the rear?

fwiw, its a base 69 350/auto with ac
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Old Sep 23, 2006 | 12:21 PM
  #5  
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Originally Posted by Corz
whats the stock spring rate for the rear?

fwiw, its a base 69 350/auto with ac
Sounds like a 9 leaf..??? Are you getting "bounce" ???
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Old Sep 23, 2006 | 12:29 PM
  #6  
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Originally Posted by Corz
whats the stock spring rate for the rear?

fwiw, its a base 69 350/auto with ac
According to my info, the base suspension springs were 280 front and 140 rear. If you're using the new 460 coils with the 35 year old steel spring, I'm not surprised your handling is a bit weird. My 77 only has 85k miles on it and the spring was totally dead.

Check out these items:
VB&P dual-mount spring (the best): http://www.vbandp.com/detail.aspx?ID=559

330# spring:
http://www.vbandp.com/detail.aspx?ID=544
http://www.vbandp.com/detail.aspx?ID=544
http://www.vbandp.com/detail.aspx?ID=384

360# spring:
http://www.vbandp.com/detail.aspx?ID=550
http://www.vbandp.com/detail.aspx?ID=547
http://www.vbandp.com/detail.aspx?ID=387
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Old Sep 23, 2006 | 01:14 PM
  #7  
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Originally Posted by rihwoods
Sounds like a 9 leaf..??? Are you getting "bounce" ???
bounce is an understatement.. last night I almost got thrown out the passenger window on the rebound

thanks for the links Mr. Wayne, I'll check em out
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Old Sep 23, 2006 | 01:57 PM
  #8  
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Originally Posted by Corz
bounce is an understatement.. last night I almost got thrown out the passenger window on the rebound

thanks for the links Mr. Wayne, I'll check em out
Then the 330#/360# might be a good choice together with KYB"S...



Rich
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Old Sep 23, 2006 | 10:32 PM
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Originally Posted by Corz
whats the stock spring rate for the rear?

fwiw, its a base 69 350/auto with ac
I beleive the stock 9 leaf is around 140#
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Old Sep 23, 2006 | 11:22 PM
  #10  
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I have the 330lbs with KYB's and it works well. Bilstiens would be better though.
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Old Sep 24, 2006 | 01:24 AM
  #11  
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My combo:
460# coils cut 1/2 coil.
340# TRW rear spring
KYB GR-2 shocks
255-60R15 tires.

Not too bad on the roads but I do try to avoid the bigger bumps. I can really feel the cobblestones in downtown Newport and the bumps going over the bridge. Still, even my Avalanche hates that road. LOL.
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Old Sep 24, 2006 | 05:12 AM
  #12  
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Originally Posted by yellowfever73
I beleive the stock 9 leaf is around 140#
Thanks, kid. I said that three posts (and 10 hours) earlier. Pay attention.
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