With the stock shocks, I would consider the eibachs as giving a Firm and a little bit harsh ride. At the end of the day, it is the illusion that you get from progressive shocks that your ride is soft, since the initial few coils have very low spring rates while the remaining coils have alot higher spring rates to compensate for the handling needs. Thus, you will really feel the bumps when the bump is large that the coils with higher spring rates are working...


Moreover, When you couple your stock shocks with the Eibachs, you should expect the problem with proper dampening since the shocks are NO longer working at the designed moving range..thus, you are killing the stock shocks sooner or later.

Lastly, the Eibachs are designed from stock shocks from the non-sport option... so there are alot of variables leading to why you would not get a comfortable ride with the Eibachs coupled with stock shocks

Hope you will find what you want from the Eibachs/stock setup

 

I dunno I've watched sedan's at G meet's that I know have prokit's on drive off and I can tell they are progressive springs with soft initial rates because of all the movement that I see going on. I could see someone sensing this movement and not being thrilled by it, I know I wouldn't which is partly why I have tremendious zeal for linear springs. And I rarely run into anyone that has a report of bad behavior in a suspension not having some truth to it, yet I do run into a sea of people that love to proclaim what I know to be bad as "great", "love it" or "rides like stock". That being said Eibach's developement car for sedan prokit springs was a non sport car, which of course has 10% softer springs and softer shocks then the sports suspension.

So we have the usual things to ask

1. What suspension does your sedan have, sport or non sport?
2. How many miles on the car?
3. Post the part number right off the box of springs from eibach.
4. Gotta ask this, how many miles on the new springs? And are your impression's drawn on roads that you alway's normally use?

[edit]

Eibach G35 Sedan 1.1”/1.1” drop on sedan
Spring rates in LBS initial/final front 259/334 initial/final rear 359/416
F +6% R +21% (looking at peak rates and in comparison to a sport suspended sedan)
F +18% R +34% (looking at peak rates only and in comparison to a non sport sedan)

 

I'll try looking at each spring tonight, if not then this weekend and look at the numbers.

 

That would be nice to compare to another car. Who knows, maybe it's me and I was not expecting it to change this much. My stag 19's go on next week. I actually got them a week ago but had to send them back because they sent me 20mm offset wheels instead of the 35mm that I ordered so you can imagine how much they were sticking out.

 

I just turned 29k yesterday. My next question then is would some aftermarket struts make the ride stiffer as they are made for more aggressive driving or cure the problem because they are made for a lowered car and stiffer springs?

 

My sedan came with sport suspension. Car has 29k miles. I will have to look at the box again but when I pulled it out of the trunk I think it was 6363-140. I will have to double check as I'm going off of memory. These springs were just installed on Friday so they probably have 175-200 miles on them. Same roads around the house and to and from work.

 

there you go you need to buy new shock absorbers. I have the pro kits on my original sport suspension shocks. The car had about 8K miles on it when I got my pro kit's installed I now have over 14K miles on the car so the springs are in it's final specs. My car is not as smooth as stock but to me it's not a drastic difference in comfort. Does my car feel bumpy over the ****ty roads here in Hawaii...No not excessively bumpy. My previous car was a 2002 Nissan Maxima SE I had it lowered with H&R springs with about 25K miles on the stock shocks. The ride was worse and I replaced my shocks after 1 year of having the stock shocks with Tokico Blues and guess what... It felt the same. If you lower your car you are not going to have the same feel as the stock ride it will be either better or worse. Get after market shocks it will help some but I don't expect a drastic difference if you want a ride that isn't as firm then you need to find a different brand of springs.

 

Aftermarket shocks will likely make his ride even MORE harsh since most aftermarket shocks are valved more aggressively.

The Eibachs run fine on the stock shocks and I find that it's a little stiffer but as far as lowering cars goes, it's about as nice of a ride as you can get. I had the 350z setup before the Eibachs and it was noticably stiffer.

 

I have the eibachs on my car - and I've noticed a little difference in ride quality, but performance is MUCH better - a lot less roll and I can take corners at a higher speed.

I recently went from stock 17"s to coupe 18"s and noticed the ride get a lot rougher due to the smaller sidewall - but the 18"s are a more performance ride and I can feel the car STICK when I really push it. If you want a luxury ride - go back to stock. Performance will be a little rough - but when you want to blow past that M3 on a turn - the perf ride helps!

 

go buy the koni's. that what i put on my sedan after i lowered with the prokits. you can adjust the ride quality. my car feels like stock, and i have never had that type of problem.

 

I thought about this thinking that the adustments would be able to soften it up for daily freeway/city driving and then being able to stiffen it when needed. Did you soften up the compression? Are you able to adjust rebound also on these?

 

I was thinking that if I was to go with something like Tokico Blues that it would make it harsher because of the more aggressive valving. If I go this route I was thinking more of adjustables. Did you or anybody else on here cut the bump stops? I was told that cutting the bump stops would help but I have not had a chance to get underneath the car yet while it's sitting on the ground to look at the bump stops. I know Shodog told me that he didn't cut his, that there is no need to because the Pro Kit does not lower the car enough.

 

I've noticed the less amount of roll also. It's a rougher ride quality. When I press down on the front end it doesn't seem to budge. The rear has some movement up and down. All of my roughness is coming off the front.

I'm putting on some 19"'s staggered next week. This should help the ride quality.

 

I checked the box to confirm the part number for the springs. They are the 6363-140. Next will be to look at each individual spring on the car to get the numbers off of them.

 

you can adjust the stiffness only i believe, i just set the shock for the softess setting. and the ride is great. i have set the setting and have not touched it since.