chris walrod

I am looking to lower my 95 993 to ROW ride height. Is there an aftermarket spring (other than factory M030 ROW) that lowers the car only this much? I really only want to lower this car a half to three quarters of an inch, but ROW specs would be fine.

The car had the M030 option and the dampers are still 'alive'. Curious how much Eibachs, H&R, Hypercoils REALLY lower these cars?

Any experience with these?

Have a high performance weekend and enjoy the F-1 race.

Greg Fishman

Eibachs lower the right amount. H&R's will be lower than you want. Hypercoil doesn't make anything (that I know of) for our cars except race springs.

I have the Eibachs and I wouldn't want my street car much lower. I will be using them on my Bilstein HD shocks if I can ever get my car up to my mechanic.

FlyYellow

i have the h&r's in my car. one thing to be cautious of, is that if you are worried about being competitive in PCA classes they will put you into Np. What a stupid rule! but they do - i found this out the hard way...

cheers,
boris

993chaz

Chris, just installed the Eibachs with Bilstein HD's, I cant rave enough about the set up. I will be posting some before and after pics tomorrow so you can compare them. Mine is now at ROW height 144 front and 127 rear, the handling and ride quality is night and day over the stock set up.
You will be very happy.

0.02
<img border="0" alt="[cheers]" title="" src="graemlins/beerchug.gif" />

smithk993

Who carries the eibach springs? Haven't seen them listed, just the M030 and H&R. do you know what the comparable spring rates are for each of these?

993chaz

Keith,

tire rack carries the Eibach springs $355 for the kit.

mdsqwerty

i wish i could get springs but i have a nasty *** drive way because my house is on a hill and i would screw up the understide of my car everytime. i Saw Eibach around $350 and i think H&R's around the same price around(about 350-400)

993chaz

mdsqwerty, I to have a nasty ^%$ driveway and have no problems, I put a FTB on just in case in conjunction with the lowered ride height and still no problems. Unless your drive is completely out of hand you should have no worries.

0.02

Speedraser

Are the Eibachs progressive?

Does anyone know the spring rates for the various options:
Standard suspension, RoW and US;
Sport M030, RoW and US;
Eibach;
H&R;
PSS-9?

FlyYellow

i would really want to know the answer to the spring rate question.

cheers,
boris

993chaz

Speedraser,

the Eibach I know for sure are progressive.

Nol, 95 993 C4

Ever since being on the trigger for the suspension upgrade I collected spring rates published on the List, with Gert and other sites. The most elusive rates are the Factory ones, I think I only found M030 in a single thread on the list without source reference. Anyway, this is what I have collected so far, some sources probably more reliable than others, all rates in lbs/inch with two values indicating progressive springs:

factory M030 150-200 fr 225-275 rr

Eibach 7209 120 fr 200 rr
Weltmeister 180 fr 268 rr
H&R peformance 240-260 fr 280-310 rr
H&R coilovers 290-310 fr 350-370 rr
H&R supercup 310-350 fr 385-435 rr
BIlstein PSS-9 225-250 fr 400-685 rr
"Motorsport" 600 fr 800 rr

Note how spring progression comes in very different ranges. Note further how the balance front to rear of the PSS-9 is Different from the rest with a relative soft front/stiff rear combo. And I thought I read that with M030 only fr is progressive, but I found it listed progressive fr and rr. The Motorsport set-up is rates I found "in the metal" on a used factory Motorsport set locally, and I've read higher spring rates still on the racer's board.

I hope this helps, Enjoy <img border="0" alt="[burnout]" title="" src="graemlins/burnout.gif" />

Nol

And then there's this interesting data from the 964 board:

Eibach 964 Pro-kit Fr 83-250 Rr 188-256
H&R 964 springs Fr 190-255 Rr 220-265
H&R 965 (Turbo) Fr 250-270 Rr 265-285
H&R 964 Coil-over Fr 250-285 Rr 265-285
H&R 964 SuperCup Fr 455 Rr 685
Carrera RS Fr 250-308 Rr 375-508 lbs/inch

"Thanks to Jeff Curtis and Bill Gregory for helping with this information"

Nol Out <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />

Speedraser

Nol,
Thanks, that's a great help.

Chaz,
Nol's list shows just one front and rear rate for the Eibach "7209," but you say yours are definitely progressive. Are yours a different set of Eibach's?

I'm trying to decide which way to go, and I'm totally confused. My car has the standard US suspension. I want to lower it to roughly RoW specs, probably closer to RoW sport than RoW standard (there is a difference in height, if I recall correctly).

Although I love DEs, most of my driving is on the street. I love back roads and entrance ramps, but I also do a fair amount of long distance interstate driving, and the roads in the NE are just horrendous. So, while I love the track and the twisty back roads, I do not want to make the car so stiff that it becomes uncomfortable on a long trip. Also, a very stiff suspension won't handle as well as one that's a little more compliant on poor road surfaces. I also love the rattle-free solidity of my car, and I don't want a setup that will pound on the car on NE roads. Don't get me wrong, however -- I do not think my standard suspension is too firm in any way, and would be happy to make it somewhat firmer (just not too much) to gain handling. Of course, just lowering it to where it should have been in the first place will help the handling.

I'm tempted by the RoW M030, again if it's not too stiff for what I use my car for. How does it compare to the RoW standard suspension? I'm also inclined to choose spring rates that have a front/rear balance like the RoW M030 -- I'd like to keep the handling balance similar to how Porsche intended.

I'm surprised to see that the H&Rs seem to be quite a bit stiffer than the RoW M030, and I'm not sure I want to lower the car as much as the H&Rs lower it; the roads are terrible. The Eibach rates look appealing, but are they progressive?

I know that this has been discussed all over Rennlist, and I've been following it, but there are so many opinions out there that I'm completely confused.

993chaz

Todd,
the Eibachs are definately progressive, the part # is 7208.140 Pro Kit.
I think you would be happy eith the set up. It's a little firmer than stock but handles so much better, the progressive springs do absorb the crappy bumps but kick in on cornering.
Trust me you will be happy with them.

Cheers

Kristoffer

I have H&R's & I love them!!! The car rides better & I don't have any problems with our streets. Of course with any Porsche let alone a lowered one you ALLWAYS have to be carefull getting in & out of driveways