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I would not recommend PSS9s for the C5
Posted by: MCH 2.7t (1034) on 2015-01-28 09:39:14 In Reply to: I too like the STs and mostly agree. posted by just me on 2015-01-27 21:02:16	Share \| Report

IMO, even on the lowest setting they are much too stiff for a daily driver. I could only stand them for a couple of months before reverting back to my 2 Bennett c/o system.

Thread:

looking at suspension upgrades for a 2003 4.2 sedan - quattrojay 2015-01-27 02:27:42 (871 views)
- Are you sorry that you started this, yet? - berniebenz 2015-01-29 14:29:12 (773 views)
- I have oem C5 S6 springs for sale if you want...paired with Billy sports and the ride.. - Swordfish 2015-01-27 18:09:23 (799 views)
  - I dont think the S6 springs are any lower than the A6 sport springs - quattrojay 2015-01-28 01:31:03 (770 views)
    - They are lower - I've owned both an a6 4.2 and an S6 - Swordfish 2015-01-28 22:30:12 (785 views)
      - thanks for info thats good to know - quattrojay 2015-01-29 01:38:30 (758 views)
- "upgrade(?) to a little stiffer ride"! Personal choice but you are perpetuating an erroneous myth. - berniebenz 2015-01-27 13:09:46 (837 views)
  - Curious: how are progressive springs (common on rear suspensions) damped? - kleinewunder 2015-01-28 08:38:10 (780 views)
    - Monroe used to advertise a progressive shock. Had piston shunting grooves in the centeral portion - berniebenz 2015-01-28 14:38:16 (768 views)
      - Another question: if a regular (nonprogressive) spring is partially compressed (as when front  -  kleinewunder  2015-01-28 15:32:44 (766 views)
        
        Coilovers use a helper spring so that adjusting the ride height does not preload the main spring   -  ThetaTau87  2015-01-29 12:31:14 (850 views)
        
        "Preload" is a poor descriptive adjective! From your pic, the two springs are in series, thus the  -  berniebenz  2015-01-29 13:41:08 (756 views)
        
        lol, no. Preload is exactly the correct technical term for what I'm describing.   -  ThetaTau87  2015-01-30 15:30:41 (786 views)
        
        Bringing the knowledge. Thanks.   -  JediJoker  2015-01-30 21:52:41 (777 views)
        
        Whoa. Physics violation alert  -  just me  2015-01-29 12:52:49 (769 views)
        
        Understand where you're coming from, but technically not true! Springs are normally pre loaded  -  berniebenz  2015-01-29 13:49:29 (785 views)
        
        That pre-load is insignificant.  -  just me  2015-01-29 15:44:40 (780 views)
        
        lol, now you've back pedaled from "Physics violation" to "insignificant"?  -  ThetaTau87  2015-01-30 15:46:14 (762 views)
        
        insignificant...Not so! If so, I'd have no use for a spring compressor.   -  berniebenz  2015-01-29 16:44:15 (762 views)
        
        There is always a pre-load on the spring. If there wasn't the springs would rattle around every  -  ThetaTau87  2015-01-29 13:10:01 (749 views)
        
        Spring rate is a characteristic of the spring, unrelated to the rest of the suspension.   -  berniebenz  2015-01-28 15:39:08 (777 views)
        
        100% true. This thread is nonsensical   -  just me  2015-01-29 12:53:13 (754 views)
        
        Mea culpa. Obviously I was not correctly visualizing how coilovers work. But I am still trying to  -  kleinewunder  2015-01-29 21:32:04 (757 views)
        
        ST coilovers don't have adjustable shocks so they can only be optimum for one spring rate.  -  ThetaTau87  2015-01-30 17:57:49 (771 views)
        
        Whether spring rate SHOULD change when coilovers are lowered is a different issue from whether  -  kleinewunder  2015-01-31 16:39:21 (758 views)
        
        The spring rate does not change when ride height is adjusted.  -  ThetaTau87  2015-02-01 13:59:36 (751 views)
        
        Actually, a lowered car, with the right dampers, can be less stiff than a stock-height car and...  -  JediJoker  2015-01-30 21:50:27 (778 views)
        
        So partial compression doesn't change spring rate, it just uses up some range of motion?   -  kleinewunder  2015-01-28 16:41:57 (764 views)
        
        The weight of the vehicle remains the same thus the spring's deflection is unchanged regardless of  -  berniebenz  2015-01-28 18:48:15 (771 views)
        
        yup. The spring is sandwiched between:  -  just me  2015-01-29 12:54:42 (771 views)
        
        I think you're confusing spring rate and load on the spring.  -  ThetaTau87  2015-01-30 17:34:21 (775 views)
        
        ^ This. ^   -  JediJoker  2015-01-30 21:45:03 (730 views)
        
        Grant, You've lost your marbles! "the spring has a rate. It is dependent on compression."  -  berniebenz  2015-01-29 16:50:40 (773 views)
  - Have you talked to the stanced crowd on this subject? - quattrojay 2015-01-28 01:38:48 (761 views)
- I installed ST coilovers to replace the stock sport suspension on my wife's S6. - ThetaTau87 2015-01-27 12:13:16 (841 views)
  - If ST coilovers are similar "comparable to the factory sport suspension" (with what shocks?) but - berniebenz 2015-01-27 23:42:17 (808 views)
    - Under certain circumstances this can be true. - just me 2015-01-29 12:58:37 (785 views)
    - I set them at their highest setting which is slightly lower than stock sport suspension. - ThetaTau87 2015-01-28 12:30:56 (816 views)
  - I have St on my s6 as well and agree.. - Dr. Funk 2015-01-27 21:46:50 (800 views)
    - Why not just replace with stock Sport suspension components, thus maintaining the matched - berniebenz 2015-01-27 23:46:58 (798 views)
      - You can't (easily) corner balance on a stock shock due to the lack of an a adjustable spring perch.  -  JediJoker  2015-01-29 11:42:55 (762 views)
        
        What is a "non-damping adjustable"? Corner balancing is a fad IMO, meaning adjusting the  -  berniebenz  2015-05-28 09:55:06 (761 views)
        
        Because corner balancing means more predictable handling means a quicker, safer car.  -  JediJoker  2015-01-30 08:07:39 (779 views)
        
        The sales pitch for CB! Necessary to hide a twisted frame.   -  berniebenz  2015-01-30 10:56:54 (764 views)
        
        A corner balanced car often looks like it's twisted because the spring heights are adjusted  -  ThetaTau87  2015-01-30 17:45:20 (755 views)
        
        You have generally defined CB as the equalization of front axle weight between the front wheels and  -  berniebenz  2015-01-31 12:37:04 (765 views)
        
        You are correct. It is a very time consuming and iterative process as every adjustment at one  -  ThetaTau87  2015-02-01 13:51:22 (735 views)
        
        Good explanations of CB, thanks guys!   -  berniebenz  2015-02-01 14:52:44 (732 views)
        
        Absolutely every aspect of vehicle dynamics can be reduced to weight transfer.   -  JediJoker  2015-01-31 17:25:25 (765 views)
        
        Precisely.   -  JediJoker  2015-01-30 21:43:14 (772 views)
  - I too like the STs and mostly agree. - just me 2015-01-27 21:02:16 (805 views)
    - I would not recommend PSS9s for the C5 - MCH 2.7t 2015-01-28 09:39:14 (795 views)
      - I've driven it. to me its great. - just me 2015-01-29 12:59:25 (729 views)
        
        2nd, although there's definitely room for improvement. Custom valving in my future. - JediJoker 2015-01-30 08:01:10 (759 views)
    - Gobblygoop! What you talk about? "i will tolerate a lot of stiffness if there is commensurate - berniebenz 2015-01-28 00:00:08 (823 views)
      - not true. These systems can slowly oscillate - nto good under track conditions.  -  just me  2015-01-29 13:02:32 (766 views)
        
        Clear and concise posting is not your strong suit! An under damped system will only oscillate,  -  berniebenz  2015-01-31 12:53:12 (796 views)
        
        I was under the impression that most OEM suspensions were designed for hard cornering on bumpstops.  -  JediJoker  2015-01-30 07:57:55 (765 views)
- I have that set up and honestly it's a little low and the bilsteins are a little hard. - PK 2015-01-27 11:51:03 (807 views)
  - your car looks good,.Have you run on 18s or just the 19s? - quattrojay 2015-01-28 01:36:00 (785 views)
    - It came with 17's, bought the RS6 18's then bought the euro 19" RS6 wheels you see pictured - PK 2015-01-28 15:07:29 (782 views)

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