Nissan 370Z Forum - Eibach to produce Nismo Pro-Kit springs.

Nissan 370Z Forum (http://www.the370z.com/)

- Brakes & Suspension (http://www.the370z.com/brakes-suspension/)

- - Eibach to produce Nismo Pro-Kit springs. (http://www.the370z.com/brakes-suspension/24870-eibach-produce-nismo-pro-kit-springs.html)

Final fitting at Eibach.

Quote:

Originally Posted by s30z (Post 807377)

Just called Eibach to find out what the spring rates are for the Nismo. And I'm not going to lie. The car looks good but Im going to pass on this.

The 370z is already well balanced out of the box I do not need it to induce understeer.
The stock Nismo rates are
F- 8.6 R- 9.3

The Eibach rates for the normal Z
F- 8.6 F- 9.5

The Eibach Nismo Rates are
F- 9.8kg R- 9.5 which is a 14% increase in the front and 2% increase in the rear.

I dont see why they would set this car up like this. They completely switched up the spring rate bias from front to rear. And a front heavy spring like that will not only induce understeer, but the valving range of the shock is also slightly altered, the rear rates being extremely close to stock, and then the front rates are more sprung. Even though it is within the valving range of the shocks, if Nismo really did a good job fine tuning their shocks then these springs will throw off the original feel Nismo was going for.

Just to show you the rest of the spring rates
Tein s-tech -
F- 8.5 R- 9.4

Tanabe NF
F- 5.9 R- 6.8

Tanabe GF
F- 8.8 R- 9.1

Swift Spec R
F- 10 R-10.5

So just about every spring manufacturer out there pretty much decreases the rates of our nismo which pretty much completely dtunes our upgraded shocks.

Eibach although stiffer, went in a weird direction with their spring rates, and will alter the handling characteristics of the Z

Swift is the only one by numbers is a performance option for our Nismo shocks.

these are all converted to kg/mm if you guys want me to post it up in pounds per inch I can do that later.

hmm..after reading this, im not sure what i want to do now. considering the nismo springs lower the car .4", and the eibach kit for the regular Z is supposed to lower the front .9". if you threw the eibach front springs from the regular Z onto the nismo, you'd have an effective half inch drop and leave the stock nismo springs.

would this be feasible...mixing springs? the spring rates should be identical going from the above post. my goal is to just even the wheel gap...because currently, the front definitely looks higher than the rear of the car.

edit: nevermind...it looks like the nismo springs are linear...mixing progressive in the front, and linear in the rear would likely not work very well.

I found the Nismo springs did not lower the car at all. So the drop of the normal Eibach springs would be on par with the Base Z's.

I'm glad I got the Swift Spec R's...

Quote:

Originally Posted by tjlazer (Post 810582)

I found the Nismo springs did not lower the car at all. So the drop of the normal Eibach springs would be on par with the Base Z's.

I'm glad I got the Swift Spec R's...

im realistically looking for a 0.5" drop on my nismo, the rear being lower than the front is just nasty. dont want to sacrifice drivability...that dang bumper scrapes so easily!

http://www.the370z.com/brakes-suspen...duction-5.html

post#74

there a nismo Z on Swift.

Also, Z's rear end already has a good amount of rear end squat to it when the car accelerates. I have a feeling that the Eibach spring spring might make the rear squat more, since the rear rate is softer compared to front.

This may be one of the rearsons why the rear is stiffer than the front from the factory.

from the factory the nismo came with stiff suspension, period......

the rear end does NOT squat at all! it couldnt hurt to have a bit softer spring back there. look at what robispec did with the KW3s he runs. if im not mistaken he even removed his rear sway bar to help gain some give in the rear.

The Z does squat. Just because you do not feel does not mean it doesn't.
It's funny how you brought up robispecs car because Sway bars have no effect on rear squat. With all the aero he has in the front maybe he was trying to induce a little more understeer. But look at his spring rates. He runs 8kg in the front and 10kg in the rear, without a rear sway bar.

The main vehicle you should be looking at though is Paul Dentice. AEperformance 370z. The car is stock no aero with jic coilovers and a big brake kit. Consistently dominating the timeattack scene and his front to rear spring rate bias is pretty big, if Im not mistaken it was like 14 in the rear and 10 in the front. This car beat out Robi's 370z, and the AEPeroformance 370Z is pretty much bone stock.

You also have to understand that even with these big spring rates it does not mean its really stiff. The rear of our cars has a pretty extreme motion ratio because the rear spring is seperated from the shock. This is one of the reasons why the rear spring is raked up so high.

Quote:

Originally Posted by s30z (Post 811510)

omg yes 1/2" of squat is still squat yes, but there is VERY lil squat.

i never said the sways had anything to do with squat. i was just saying how he loosened up his rear end and what not.

also do you own a nismo or a tourning edition?

^by what he said I mean Im agreeing with s30Z (LOL)
Damn Fuct you fast!

And also dont forget that our fronts are double wishbone too, so the spring rates do tend to feel much softer compared to other cars with McPherson type suspension.

Quote:

Originally Posted by fuct (Post 811532)

I have a touring model with all the options available.
I did not get a Nismo because I drove my friend's Nismo, and I felt that it is not for a middle aged guy like myself due to the radical looks. I drive my other toy for track days anyway.

Quote:

Originally Posted by whoLEEoh (Post 849728)

n e update on this?

What sort of update are you looking for? The Eibach's are already in production and are available for purchase.

Quote:

Originally Posted by Imperial (Post 851777)

What sort of update are you looking for? The Eibach's are already in production and are available for purchase.

Oh really? I've called places and noone has a price or knows what I'm talking about. Can you please post up the price here?

Quote:

Originally Posted by whoLEEoh (Post 852758)

Oh really? I've called places and noone has a price or knows what I'm talking about. Can you please post up the price here?

the part numbers for the nismo specific springs have been posted in this thread somewhere. if not, check eibach's website..there is a nismo specific link in the parts application catalog. then just call any shop that sells eibach products, they should be able to order it and get them for you.

with that said..i believe the prices most shops i called are charging around 300 for the springs