Lizard928

I had the bilstein eibach setup on my car, and pulled it off and put on Carl's 1000/500 hypercoils w/ koni adjustables. the difference is amazing.

imo it is not too stiff for the street, car keeps and holds more grip, which means keeping more speed through the corners.
Who knows you may be able to get away with bilstein/eibach if you cut a link or two off the spring and had much stiffer swaybars (which is next on my list to get). But for me I find I can hold more corner speed with the koni hypercoil setup than I could with the bilstein/eibach. This is with the same tires on the car. Part of it may be carls tubular upper a arms though.

Stan.Shaw@Excell.Net

LMAO

Jim bailey - 928 International

The same mentality which thinks bigger is always better also thinks stiffer is always better. The only way to determine that suspension changes really make a difference is when comparing lap times at race track with a driver who turns consistent laps. I would highly recomend that you take your car to the track as it is before you "FIX IT" . Once you are better than the car improve the car. The biggest improvement comes from tires. DOT legal race rubber like Kuhmo V 710s last a few weekends but work so much better than street rubber but are slower than full race slicks. Race tires can cost $1,000-2,000 for one weekend. For the DOT tires to work better you need more negative camber in the front than you can possibly get with stock suspension so S-4 uppers which are shorter gives more negative, in fact too much ....but that can be fixed with shims !

Sab

thanks for all the suggestions.
The car has 25 year old springs and shocks and sits really high. Shocks don't feel good at all.
So I think I need to do something before heading to the track.

What is the difference regarding height and ability to adjust the ride height by either going with Eibach springs and bilteins or the package with coilovers and Koni's?

For tires, I am planning on getting the Kuhmo v710"s.

IcemanG17

Sab
Carls prices for the hypercoil-konis is VERY good....I got a quote from a suspension shop at Infineon to replicate the package and the (very honest) guy told me he can't match or beat Carls prices for springs-shocks with hardware & collars....he could match just the shocks and springs, but the collars are custom made pieces that are pricey! For the price Carl is asking, thats the best way to go!

Ispeed

I would also vote for straight rate springs over the Eibachs. I have 600/400 and could easily see going stiffer.

Bill Ball

Hi Lizard:

Do you understand how the same Koni shocks are able to dampen spring rates from 215 to 1000 with only rebound adjustment? When I had my Konis dyno'd, the shock tech said they didn't have enough dampening for stiffer springs.

worf928

What exactly is a 'proper' coilover setup? Does use of the eibach springs make for an 'improper' coilover setup?

Lizard928

Bill, I went with Carl's recommendation to use the Konis, really I would have liked to get Ledas, but dont want to fork out the cash for them right now, maybe in the future. And I believe that I had already mentioned in here (may not have though) that the rebound (full hard settings) is ok, but the dampening could definetly use more. There is NO questions about that in my mind. I still need to get out and test it with some higher speed cornering to tell if it is in need of alot more for high speed corner stability on rough roads.

Dave C, imo a proper coilover setup is what Carl is selling, I am not a huge fan of progressive spring rates. and I like the lower unsprung weight of Carls setup.

Couple of things I would do should I do it again. I wont make any suggestions on spring rate though as that has alot to do with your driving style, limits, and how you like the car to handle when close to the edge. I would recommend that if you do it at a higher spring rate (like I have), get the springs 2" to 3" shorter that the standard spring sizes. Reason being as they dont compress near as much and getting the car lower than factory will not happen. Though I am working on that now.

the flyin' scotsman

Hi Bill.............can you remind us what suspension set up you settled for? I recall weird issues with Konis and a dislike for Eibachs.

Was it Bilsteins and stock springs? If so, are the stock springs well used?

ShawnSmith

Just a thought: You'll probably want to keep any advice/preferences on suspension setups in context of how the person _uses_ the vehicle in question. The right setup for racing is gonna be very different from the best street/track compromise, which will again be different than an optimal aggressive-daily-driver rig.

I've heard good things about the Eibachs for the street, and folks seem to rave about the hypercoils at the track. Personal taste is gonna factor in there too

FlyingDog

Plan A: Get a set of used Bilsteins, Eibach/Hypercoil 2.5" (not the progressive 928 Eibachs) springs, and send the shocks to Bilstein to be revalved to your springs.
Plan B: Advance-Design coilovers for $399 each.

As I see it, the next step up is $2000 for Koni 3012 shocks or Ledas, plus springs/perches/mounts.

Stan.Shaw@Excell.Net

I like the 3012s with 100/500 hypercoils. I was lucky to get a deal on a used set, and have since had one pair of shocks rebuilt. The custom mounts cost me @$1k as I recall.

A key point to consider in all of this is what the weight of the car is, and will be. Also, consider what some people like "on the street" doesn't really apply for track use (in my opinion).

Sab

... custom mounts, revalving used shocks, custom sleeves...
the package sounds just what we need. I was planning on wasting a set of tires in Sebring in January '08 ...

FlyingDog

Stan, I didn't know you had 3012s?!?! Rennlister Red has them and said he'd send me pics and comments when he has a chance.I've considered becoming a Koni dealer to offer a complete package.

<disclaimer for Randy>I would look into becoming a Rennlist sponsor if I did that.</disclaimer>