Jim,

Thanks for the info. Maybe we have found the problem! Those stock springs don't look progressive. Now my question is are the NISMO springs progressive? Might have to go Eibach afterall!

 

What about the shocks? Are we backing off the shocks or will we need both, new springs AND shocks? BTW, has anyone ever found out the spring rate on the stockers?

 

Check out this thread with the pic of the NISMO springs! Look more like the Eibachs than the stock springs to me.

https://my350z.com/forum/showthread....=nismo+springs

No I am not backing off anything. I think the NISMO setup is the way to go. The stock setup leaves much to be desired. The Eibach seems to help the problem. I am still waiting on Nissans response before I do anything.

 

jmark............thank you!

 

To my untrained eye the NISMO & Eibach springs are very similar. The stock springs are different. Do you agree?

 

Have you or anyone kept track of camber? Stock on my enthusist is about 1 deg in fromt and 2 in back. On track the tire temps showed the rear was about right (274/40/17s) and the front (245/40/17s) could use about 1/2 deg more. With .8" drop and 1.2" drop camber will increase about 1/2 to 1 deg. In addition, with the greater drop in the rear, the power-on oversteer should be reduced but the corner entry push will increase. Of coarse, the camber changes may dominate. If someone could measure camber changes and actual hieght changes, it would really help in determining if these Eibachs are helping or not. Note, measure ride hieght at the baseboard to ground making sure you are parked on level and even ground. This applies to camber also.

 

No problem. I find it interesting that the NISMO susp. kit's springs are progressive similar to the Eibachs. The stock springs are not progressive (static?). Now Nissan why did you do that? NISMO has fixed the bounce problem and increased the performance envelope while using the progressive springs. Eibach seems to have fixed the ride problem too. For all we know Eibach makes the NISMO springs.......Thanks to Jim H. for the installation, report and pics. The plot thickens........

 

The NISMO springs and the Eibach have the same configuration 8 turns. Will the Eibach's work on an Enthusiasts model with 17" rims?

 

My Eibach's will be here Monday. I have a Touring Model with 18 in rims and stock suspension.

I would help you with these "camber" measurements if you like but it all sounds greak to me. If you could elaborate in laymens terms perhaps I can help before after install of my Eibach's?

I am not really a suspension DIYer.

Off to work. Ughhh.

 

TOP

 

Camber is simple to measure with the right tool. Camber is the angle of the wheel with respect to vertical. If you stand well behind your Z, you will see the rear wheels canted with the top inward of the bottom. This is negative camber. If the car is lowered, the camber will become more negative. This is why some people use camber plates to adjust this camber. Camber has a huge impact on handleing. Not enough camber and the tire will wear on the outside and grip is reduced in corners. Too much and the tire will wear on the inside and grip is reduced in all conditions such as breaking and acceleration. What I am concerned with is getting too much camber after lowering the car. I have not found anyone, even the racers, list the camber changes per lowering. To measure camber takes a tool that will show the angle on the wheel with respect to vertical. I built a simple one over 10 years ago with a scrap piece of wood, a hacksaw blade and a little trigonometry. Any decent racing shop will have a camber tool. Note that any spring or adjustable coilover that lowers the car will give increased camber and will give the needed information.

 

I will cut paste and print these instructions for the installer (haven't decided who to let do it yet here) and tell them part of this deal is these measurements and that I will make them famous.

Extreme Dymanics is working with me sort of like a sponsor, they may help me v with this. Is so it will be posted.

 

I just got off Eibach's website and they state in their FAQs section, the installation of their springs will probably accelerate the wear on the original shocks. Which says to me, buy coilovers, or a new spring/shock combo. If you install springs first, your OE shocks will bite the dust sooner,which would be a blessing for some of us, and Eibach just came out with a damper to work with their progressive springs. So did H&R, BTW.

But, if you buy adjustable shocks, they will work with the stock springs, but they will work a lot better with high performance springs, ergo;our fix for the bounce =new adjustable shocks and/or progressive springs that match. Right back where we started from, it seems.

I think I'll just leave it there.

Boomer

 

I think my FireHawk had Eibach springs and Bilstein shocks.

Maybe I will do both at once.

Bilstein

 

Seems reasonable to me, Max. How about you, Pedal P. and jmark? NISMO will be sucking wind if I have to pay more to cure the bounce.

 

Well I know the cars are different apps but the combo are definately proven winners!

Definately gonna do both after I did some reading not just springs.

 

Amen, Brother.

 

You guys seem to have some history that I am missing, so forgive me if you've already covered this question, but I was wondering: Are you avoiding the Nismo setup for a particular reason (cost, adjustablility, availability, etc.) or are you just looking for alternatives?

I like what I've heard about the Nismo kit (easy setup, no adjustability required, only drops front end), but I don't know too much about other options.

Any comments are appreciated.

Thanks,
D'oh!

 

I guess the NISMO cost is one issue. Availability is another. Nissan messing up the shock spring combo is a third. I am still waiting for Nissans response. I feel it is just as big a problem as the BOSE sound system. Now where is our fix.

 

My feeling is that since Nissan fouled up the OE shocks/springs, we should get the NISMO replacements for free. I already paid for a set of sports car shocks/springs, why should I pay for them twice by buying NISMO's fix? That is my meaning in my previous post, I will not pay Nissan twice for a set of high performance shocks, unless I get a LARGE discount. We trusted Nissan to have a world class sports car and I feel their silence on the suspension woes is unacceptable.