Has anyone updated their 1995 rear suspension to 1996+ parts?
06-05-2005, 06:52 PM
#1
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Has anyone updated their 1995 rear suspension to 1996+ parts?
Per the PCA tech section, Porsche made "minor suspension geometry" changes for 1996, and the PCA tech guys are recommending the people update their 1995 parts to 1996 specs since it will increase rear-end high-speed stability (mainly a track issue). Has anyone done this? If so, how much do the parts cost?
The reason I ask is that my rear gets a little squirrely when I really push hard in corners. More so than my 1996 did, but there are other factors involve (obviously) so I'm not interested in spending $$thousands on a marginal improvement. My car sees about 50% track use.
For reference sake, here are the parts that were revised:
1- 993.331.041.02 A-arm L
1- 993.331.042.02 A-arm R
2- 993.331.045.03 Kinematic link L&R
2- 993.331.047.03 Camber link L&R
2- 993.331.131.06 Subframe arch L&R
(Source: PCA Tech #1 )
Here are other articles of interest:
PCA Tech #2
PCA Tech #3
The reason I ask is that my rear gets a little squirrely when I really push hard in corners. More so than my 1996 did, but there are other factors involve (obviously) so I'm not interested in spending $$thousands on a marginal improvement. My car sees about 50% track use.
For reference sake, here are the parts that were revised:
1- 993.331.041.02 A-arm L
1- 993.331.042.02 A-arm R
2- 993.331.045.03 Kinematic link L&R
2- 993.331.047.03 Camber link L&R
2- 993.331.131.06 Subframe arch L&R
(Source: PCA Tech #1 )
Here are other articles of interest:
PCA Tech #2
PCA Tech #3
Last edited by TheOtherEric; 06-05-2005 at 07:20 PM.
06-05-2005, 07:48 PM
#2
RL Technical Advisor
Eric:
You'll likely get a bunch of opinions here, but if you really want to make a significant difference in the stability of your car when you push it in the corners, there is not a better upgrade than a set of adjustable links made by ERP.
Replacing the OEM lower toe control links, kinematic toe links, and camber links makes a FAR bigger difference than all of the above OEM parts from the '96-on cars. These eliminate the rubber bushings that contribute to alignment setting changes when loaded up and also offer a much greater range of adjustment.
Its NOT a "marginal improvement",....
Jim Morton can offer some feedback on this as he has 'em.
You'll likely get a bunch of opinions here, but if you really want to make a significant difference in the stability of your car when you push it in the corners, there is not a better upgrade than a set of adjustable links made by ERP.
Replacing the OEM lower toe control links, kinematic toe links, and camber links makes a FAR bigger difference than all of the above OEM parts from the '96-on cars. These eliminate the rubber bushings that contribute to alignment setting changes when loaded up and also offer a much greater range of adjustment.
Its NOT a "marginal improvement",....
Jim Morton can offer some feedback on this as he has 'em.
06-05-2005, 09:37 PM
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Steve,
Not sure I follow your thread of info... sorry, it's a little hard to read.
Are you saying to go ahead and replace the parts listed AND (while you're in there) add the ERP adjustables? (to make a BIG difference in handling)
You mention OEM in the same sentence and I have to admit being confused! (not hard really )
Thanks,
Clive.
Not sure I follow your thread of info... sorry, it's a little hard to read.
Are you saying to go ahead and replace the parts listed AND (while you're in there) add the ERP adjustables? (to make a BIG difference in handling)
You mention OEM in the same sentence and I have to admit being confused! (not hard really
)Thanks,
Clive.
06-05-2005, 09:44 PM
#4
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Thread Starter
Although I'm sure you're absolutely correct in theory, I wouldn't have the slightest idea how to adjust 3 ERP adjustable upper control arms. I wish I were that competent, but I'd probably do more harm than good.
In case anyone is wondering what we're referring to, here's a link:
http://www.smartracingproducts.com/p..._rear_arms.pdf
Thanks Steve for the info; I didn't know such things existed!
In case anyone is wondering what we're referring to, here's a link:
http://www.smartracingproducts.com/p..._rear_arms.pdf
Thanks Steve for the info; I didn't know such things existed!
06-05-2005, 09:47 PM
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I think Steve is referring to the set of links (as in the three links he mentioned) from ERP to replace the rubber bushing OEM parts, and not to bother replacing with the OEM parts listed by TheOtherEric.
06-05-2005, 09:49 PM
#6
RL Technical Advisor
Clive:
I am referring to a special set of control arms that REPLACE the OEM parts that these cars currently have.
The ERP items have far more adjustment than any Porsche items and can easily be adjusted at alignment time.
Eric:
This is something that the alignment tech does, not you. Once installed and adjusted, its not necessary to do anything further. A competant alignment tech will truly appreciate the ease and resolution of adjustment to get a VERY precise alignment.
We sell & install a lot of these,....
I am referring to a special set of control arms that REPLACE the OEM parts that these cars currently have.
The ERP items have far more adjustment than any Porsche items and can easily be adjusted at alignment time.
Eric:
This is something that the alignment tech does, not you. Once installed and adjusted, its not necessary to do anything further. A competant alignment tech will truly appreciate the ease and resolution of adjustment to get a VERY precise alignment.
We sell & install a lot of these,....
06-05-2005, 10:01 PM
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Originally Posted by Steve Weiner-Rennsport Systems
The ERP items have far more adjustment than any Porsche items and can easily be adjusted at alignment time.
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06-05-2005, 10:54 PM
#8
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Originally Posted by chris walrod
That does it, widebody here I come
06-06-2005, 02:52 AM
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Originally Posted by Steve Weiner-Rennsport Systems
Au contraire, ami dans le besoin,......these things fit narrow-bodied cars as well,....
06-06-2005, 03:52 AM
#10
RL Technical Advisor
Originally Posted by chris walrod
My attempt at humor didnt come across correctly.. Wonder how far I can extend a narrow bodies rear track width
I can extend that bodywork as far you wish. 14" wide wheels are not impossible with a nice cash infusion.
06-06-2005, 03:36 PM
#13
RL Technical Advisor
Originally Posted by Jean
Bon Francais Monsieur Weiner! Hmmm I wonder how a 993 with 14" rear RSR like fenders will look like..
Hmmm I wonder how a 993 with 14" rear RSR like fenders will look like..I have a '97 993 RSR here with EVO bodywork. Its packed in with other cars so let me see if I can get some pics that are worthwhile.
06-06-2005, 06:59 PM
#14
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Well, I just got some prices on those parts that would be replaced. Grand total (@15% above dealer cost) = $2000. Get them from most dealers and they'd charge probably $3000 - $4000. I guess that's why nobody's responding that they've done it: it's not worthwhile!
But the ERP adjustable links don't seem to address the "minor suspension geometry" changes made in 1996. Specifically, they don't replace the lower a-arms or the subframe arches. So they don't address the issue, but do indeed give you a) nice monoballs, and b) finer adjustability, which are nice (but unrelated) upgrades. But I guess the point is this: if you're going to spend $2000 on your rear suspension parts, buy the ERP links, not factory 1996 parts. That makes sense.
But the ERP adjustable links don't seem to address the "minor suspension geometry" changes made in 1996. Specifically, they don't replace the lower a-arms or the subframe arches. So they don't address the issue, but do indeed give you a) nice monoballs, and b) finer adjustability, which are nice (but unrelated) upgrades. But I guess the point is this: if you're going to spend $2000 on your rear suspension parts, buy the ERP links, not factory 1996 parts. That makes sense.