**UPDATE** Ended up putting on the un-revised on all 4 corners and I couldn't be happier. Install was a breeze all around, save for the front-pass side. The lower strut bolt wouldn't break free, so I had to head in to a shop to have them loosen it. No biggie. HUGE thanks to Jesse / 4D05G35 for his offer of assistance and for selling them to me!

So I've pored over all the info I could find between this and other G/Z forums. There are tons of posts that are perfectly clear about springs, however I couldn't find anything definitive regarding the shocks. Hopefully I can get the answers I need once and for all.

My Rig - '06 Sedan Non-Sport

Picked up yesterday a set of 350z un-revised springs and shocks.

I've read that I don't have to use the shocks, however it was unclear in that statement if that applied to having Sport shocks. I've also read that un-revised shocks tend to "bounce and porpoise" when driving. I couldn't find anything definitive about the recommended shocks to go with un-revised springs on a non-sport sedan.

So what can I expect from the following:

Z combo as it is; un-revised springs & shocks

Z springs, stock non-sport sedan shocks

Or, if neither of these are ideal, what is?

I to those with the knowledge.

 

The bounce came from the softer spring rate of the unrevised. They revised the spring to fix that problem on the Z. I never experienced any bounce when I ran unrevised Z springs on my sedan. I dont think that you will notice any difference in ride quality between the Z shocks/struts and the sedan shocks/struts. If I recall correctly the Z spring rate is only 11% higher than the sedan spring rates.
If you dont mind a little firmer ride, Tokico HP's make a great upgrade for the cost.
I was happy with the unrevised springs + Tokico's when I ran them.
Let me know if you need/want a hand putting those springs on, we could knock them out in no time. I would be more than happy to lend a hand.
Oh btw this is Jesse, we met yesterday



I was going to ask if you were on here. Had I known that you were I would have just told ya to bring the car over and we could throw them on.

 

Hey Jesse! Yeah after doing more reading, I came across your post on here. Small world! Been here for a little while, but seeing as I've stayed pretty much stock since getting the car, my activity has mainly been of the reading kind.

Would def like the help. I'll shoot you an email and we can work it out.

 

First of all, you might want to get G coupe rear springs. Unrevised Z springs on all corners will lower the car more in the rear than in the front. It is quite easy to change the rear springs, so you can always try the Z springs first.

Second. You don't mention the miles on the used Z dampeners. I would think you definitely want more dampening for the stiffer springs, the question is whether to use the Z dampeners or get new aftermarket. You really want to decide this before putting the springs on, because there is a lot of labor to changing the front springs/dampeners (whether you do it yourself or pay for the job).

Third. Don't forget to have it aligned afterwards.

I just went from revised Z springs on all corners to Eibach Pro-kit springs and couldn't be happier. Have fun with the install.

 

Yours is non-sport sedan, by default the oem 350z unrevised springs and shocks are firmer than what you have now. With what you have now your best option is to put the z combo on as is, and expect it to ride a little firmer than your non-sport springs and shocks. Don't use z springs on your stock non-sport sedan shocks, those shocks are not tuned to handle z springs' the higher spring rate.

 

To add some more to think about. Revised 350z REAR springs and G35 coupe sport/19" wheel springs are the exact same spring. They are .5" higher than the un-revised 350z rear springs as well. I'm running 350z revised springs on my G35X, best $60 I ever spent on a car. lol

 

Hmm, this is interesting, as Jesse also has a set of REVISED 350z REAR springs.

So ideally I could go:

Front - un-revised springs + struts
Rear - revised springs + struts

And all would be level, yes?

 

Yep.

 

Just for clarification. The unrevised Z springs will lower the car the same front and rear (1"). The revised Z springs will lower the rear .5", and the front will remain 1' lower.
The front wheel well is cut lower on the rear so the wheel gap is less than in the front when you lower it evenly. Dropping the front .5" more than the rear will give you the same tire - fender gaps.


I clarified above. If you want the revised they are yours.
If you want to put the unrevised in first to see how it looks and if you dont like it we can throw the revised on. Its a quick easy job.

 

Ahhh, ok. Well that makes sense. I have a feeling I'm going to opt for the revised rears in the end. But I'm putting the un-revised in this weekend and will figure it out next week.

And Jesse, you rock

 

Let me know how it works out. We can always throw the revised on after we put the fronts on next week.
You have an email.

 

I have a non-sport sedan with revised Z springs/shocks in front and coupe springs and shocks in back to give a more even drop. I thought the bounce issue was from the shocks not the springs. Anyway, the ride quality will be rougher but more stable and flat in cornering and braking. After 4 years with it, I started to have camber problems and uneven tire wear (switched back to stock now). Here it is dropped-

 

That looks pretty sick. I think I'll go revised/coupe rears to start based on what seems to be the consensus pick.

 

Yo, do you have any pics of your ride you could post?