Adrian

Guys,
This is going to end up getting confused. Firstly what is available on the 996 in option M030 is quite different to the 964. The 996 ROW option M030 provides a 30mm lower ride height as compared to the US version of option M030. If you own a 964 ignore the articles in Pano. Yes I have them as well, I am a PCA member.
What was fitted to the RSA was very different to the 964 RS the system that Bill has used. Far superior to the RSA.
The ride height of a RSA is the same as a standard C2/C4 in the USA. Option M030 did not lower the auto. Stiffer ride by 40% and progressive rears as has already been mentioned.
The ROW version of the 964 option M030 used different springs even though this is not shown in the parts catalogue. ROW 964s have a lower ride height than US versions. However option M030 did not lower the ROW versions either.
If you are looking for a suspension upgrade forget option M030 on the 964. You will be very disappointed,
Ciao,
Adrian
911C4


Adrian

Brian Leduc

I noted that Schatz Motorsports has a 964 page (it may have been there for a while, but I just noticed).

<a href="http://www.schatzmotorsport.com/C2.htm" target="_blank">http://www.schatzmotorsport.com/C2.htm</a>

I find in interesting that in its current iteration, they are running stock shocks with RoW M030 springs.

I am curious how the RoW M030 springs compare to either the Eibach or H&R in terms of stiffness and ride height.

As an aside, I was speaking with my mechanic the other day about suspension mods on my 90 C2 (currently 100% stock). I am an avid autocrosser (new to Porsche, but I have autocorssed for the better part of 12 years). In event, I would like to drop the car a bit, and make some improvements for autocross purposes, while retaining somewhat decent ride quality. I opined that I was likely to do the H&R/Bilstein or Koni/Eibach route next season.

He surprised me be suggesting that, in his view, the stock shocks (Boges) were fine, and if it were his car, he would just do the springs. FWIW, this guy is a racer, and normally takes FTD at our PCA events in a full race 914. He does have a fair amount of experience in these these matters.

I know that there is some debate about doing shocks/springs together (I would tend to agree with the "do 'em both camp"), but my wallet likes the sound of doing just springs!

Regards,

Brian

jonfkaminsky

my wallet says the same thing, but my head says shocks and springs should be matched for best performance. The Boge shocks were not designed to work with the H&R spring rate. They might not possess enough damping to handle the H&R to the best.

91C2wrencher

I guess I'll chime in here if only to cast a positive vote for the Bilstien/H&R set-up. I picked up a used set from a local "racer" who complained that the turn in was horrible on his C2.(he has since spent @$4K on the"right" set up.) Well, I popped the $400.00 he was asking and put'em myself and schazam my rides car f-ing fantastic! Even my mechanic commented on the ride after the change. It is a little stiff on the highway but is glued on the track. As a post note I did take first place(PCA D class) at the only auto-x I did since the change and I'm no AX god.

Jeff Curtis

Hmmmmm, guess I was referring to the common Eibach springs available here in the U.S.??

I was positive that they weren't progressive, okay, I may be wrong...I'll check into it.

On any note, for those of you who desire a considerable improvement in handling for a street/track car...I would opt for a progressive type sport/lowering spring - as you have likely surmised from these threads, there's a few different ones on the market.

I would take a risk and say they all work great, I LOVE my Bilstein HD shock/H&R 965 sport/lowering spring setup...my track compadres don't.

Mr. C4

Volks,

What about the FVD combination Bilstein shocks/Eibach springs??

Ciao,

Johannes E.

willC2

I have the FVD kit (bilstein/eibach) on my C2. I used to have H+R shocks with koni adjustables. IMHO, the FVD kit is easier to live with. More forgiving than my old setup, and very tight.

I would give the FVD kit a definate <img src="graemlins/bigok.gif" border="0" alt="[thumbsup]" />

And its VERY competitively priced.

will

SonnyV

Hi all,

Just to add one more data point, I have used both Eibach and H&R springs on 2 very different cars.

The Eibach Prokit with progressive springs on my '94 Acura Integra GSR with Tokico sport shocks. I love this combination for street use. It is a little soft for serious driving. The car is lowered just right, most people would think that the car is at stock height.

The H&R springs (965) on a '92 C2 Turbo with original shocks. It is firmed and lowered the car just right also (for a Porsche). It is very tight and I love to drive this car on twisty roads. There is virtually no body roll and very livable in everyday driving.

I would recommend of both of these springs. From what I understand H&R tend to lower the car a little more than the Eibach Prokit. If you don't have adjustable suspension (for ride height adjustment), you might want to make sure you can live with a lowered car such as with H&R springs.

Regards,

Sonny

Rick964

Well thanks for all of the input everybody. I am not sure that it helped me make a decision but I will let you all know what I end up doing, along with some before and after photos.

Jeff Curtis

Rick, fly out to the Club Race at Mid-America in Iowa next weekend...I'll give you a ride and you'll make a decision then!

Adrian

Dear Rick,
A key issue with this is the fact that you own a Cab. Cabs flex far more than Coupes. You will need to factor this into your decision. You canput the latest and greatest suspension into your cab but if you do not stiffen up the body then you will lose many benefits.
Also suspension set ups are very personal. Drive as many different 964s as you can but ensure you try a couple of cabs if possible. The cab is a very different beastie to set up. Certainly I would remove the 18mm rear sway bar and replace it with a 21 or 22mm. I would also add a front strut brace. Plus the fact that you really should change the shocks. Lowering springs only for road use is normally okay (I still do not recommend it) but for serious track work or driving at the limit you may start to bottom out your struts and shocks. This is at best annoying at worse with massively shorten the life of these components and induce handling problems. This is a bit of a science but as I said also very personal. I would certainly be talking to cab owners who have done these mods rather than us Coupe owners. One person that springs to mind is Todd Serota. He is a C2 man but he tracked his 1990 C2 Cab. He drives a 996 cab now.
Ciao,
Adrian
911C4

Christer

[quote]Originally posted by willC2:
<strong>I have the FVD kit (bilstein/eibach) on my C2. I used to have H+R shocks with koni adjustables. IMHO, the FVD kit is easier to live with. More forgiving than my old setup, and very tight.

I would give the FVD kit a definate <img src="graemlins/bigok.gif" border="0" alt="[thumbsup]" />

And its VERY competitively priced.

will</strong><hr></blockquote>

Will

Thanks for the VERY late feedback on the FVD setup!

Christer