S4 MY89 Suspension/Ride Height Questions
02-26-2022, 08:32 PM
#46
Rennlist Member
Jeff,
In the static position there is no torsional spring reaction in the bushes. Easy enough to measure the free length of springs when new and when exhausted. The front end droop cannot be explained by other than spring sag and if it could all well and good- I am all ears as they say. The car does nought to sixty in approx 6 seconds and 60 to zero in 3 seconds as I recall - that in a nutshell does for the springs long term and I would bet that the 928 springs last longer than most but they do not last forever.
Indeed I sometimes think folks generally have little perception of what really happens in the bushes- supposedly they follow Young's Law but if they did they would return to their natural position as soon as the weight of the vehicle is imposed on them but as we know that just does not happen- so clearly something else is going on. To this day I do not think I have ever heard of this anomaly being discussed in the forum yet alone resolved- it just seems to be accepted with no thought given to it.- that is not a problem per se but I do find it intriguing.
In the static position there is no torsional spring reaction in the bushes. Easy enough to measure the free length of springs when new and when exhausted. The front end droop cannot be explained by other than spring sag and if it could all well and good- I am all ears as they say. The car does nought to sixty in approx 6 seconds and 60 to zero in 3 seconds as I recall - that in a nutshell does for the springs long term and I would bet that the 928 springs last longer than most but they do not last forever.
Indeed I sometimes think folks generally have little perception of what really happens in the bushes- supposedly they follow Young's Law but if they did they would return to their natural position as soon as the weight of the vehicle is imposed on them but as we know that just does not happen- so clearly something else is going on. To this day I do not think I have ever heard of this anomaly being discussed in the forum yet alone resolved- it just seems to be accepted with no thought given to it.- that is not a problem per se but I do find it intriguing.
02-27-2022, 04:51 AM
#47
Rennlist Member
Before to change the ride heigh, I think to replace my BOGE by new BOGE (not BILSTEIN B6). Which parts to order ? I see that BOGE has been replaced by SACHS.
I will order these parts :
Front vibration damper SACHS 314617 : 928 343 055 07. 105 USD on RockAuto
Additional front spring (shock rubber stop) : 928 343 527 02
Rear vibration damper SACHS 664008 : 928 333 051 16 (can't find it. Out of stock everywhere ...)
Additional rear spring (shock rubber stop) : 928 333 518 10
Do you see something else to buy ?
Where to find rear SACHS ?
I will order these parts :
Front vibration damper SACHS 314617 : 928 343 055 07. 105 USD on RockAuto
Additional front spring (shock rubber stop) : 928 343 527 02
Rear vibration damper SACHS 664008 : 928 333 051 16 (can't find it. Out of stock everywhere ...)
Additional rear spring (shock rubber stop) : 928 333 518 10
Do you see something else to buy ?
Where to find rear SACHS ?
I might be wrong but I think the front OEM shocks in our GTS are not adjustable. Hopefully, somebody else will pitch in and knows for sure.
Without threads at the front, you can not change the ride height. Get in contact with Roger and he can set you up and answer all your questions. Only the OEM fronts are cheaper, the rears are basically the same. The Bilsteins are great Shocks and fully adjustable, trust me on this one. I'm driving them myself and they are so much better than OEM.
There are some parts for our cars were OEM is not the best option.
The following users liked this post:
Fabien92 (02-27-2022)
02-27-2022, 05:21 AM
#48
02-27-2022, 09:29 AM
#50
Rennlist Member
As I am aware all S4 and GTS models have adjustable suspenders unless of course it just so happens that all the ones I have seen had such. Remember this example is sitting very low at the front and maybe that is why what you see looks a bit "strange".
02-27-2022, 11:04 AM
#51
Rennlist Member
Is there some confusion between adjustable shock absorbers (Boge, by my understanding are not adjustable), and the ride height - which is adjustable on all 928's with which I'm familiar (only owned '87-'95 models)?
02-27-2022, 11:15 AM
#52
Rennlist Member
As I am aware the concept we are talking about is adjustable ride height. Stock shocks are non adjustable, the Koni's on my front end are internally adjustable, The Bilstein gas shocks on my rear are non adjustable but there are other Bilstein variants that are adjustable.
02-27-2022, 05:55 PM
#53
02-27-2022, 05:57 PM
#54
02-27-2022, 06:41 PM
#55
Rennlist Member
This is why new stock shocks won't change anything at the front.
The following users liked this post:
Fabien92 (02-27-2022)
02-27-2022, 06:47 PM
#56
So, I have to order springs with new shock absorbers ?
About rear, SACHS or BILSTEIN are out of stock everywhere ...
02-28-2022, 07:26 PM
#58
Where to find rear BILSTEIN B6 ? They are out of stock everywhere ... Do you know a good dealer ? Thank you ;-)
Front : BILSTEIN B6 24-009669
Rear : BILSTEIN B6 24-009744 (no more available ...)
Or this kit (good price but not available ...
) BBGL-48166-168-3801864 : https://www.eeuroparts.com/Parts/499...ce-3801864KIT/
Front : BILSTEIN B6 24-009669
Rear : BILSTEIN B6 24-009744 (no more available ...)
Or this kit (good price but not available ...
) BBGL-48166-168-3801864 : https://www.eeuroparts.com/Parts/499...ce-3801864KIT/
Last edited by Fabien92; 03-01-2022 at 02:20 AM.
03-01-2022, 05:49 PM
#59
And what about KONI ? Which one ? Thank you guys 
03-01-2022, 10:49 PM
#60
Since rear SACHS #664008 or BILSTEIN #24-009744 are not available, I think to change only front with SACHS #314617 and the additional spring. I will keep my front wheel springs and I will reuse the nut and the threaded ring. Do you agree ?
