looking for better suspension then the nismo suspension
 

i am currently driving 2013 nismo but i want to upgrade my suspension,
i track my car once a month (fuji speed way) and use my car as sunday street car.

i love the nismo suspension around the track but i getting little sick of the bumpy ride on street, i wish i can change the damping on nismo but i cant so i was thinking of upgrading the suspension.

key factor is

i use the car for track and i use it for street.
i want someing which is more smooth less bumpy on the street.
but i dont lose the performance.
ride high i might drop it 1/2inch but not much lower then standard hight
about the price i am not to worryed about but something under 4k

Thanks for actually making a proper post and stating what your issues and goals are.

The springs on the Nismo are constant/linear rate. On the track this means they are very predictable and are easy to match a damper to. Down side they are the same on and off the track.

Progressive springs, like those found on KWV3s, are progressive. These give you a nice soft ride for cruising around town and can be just as firm as you need for hard cornering. The problem on the track with these they are less predictable and hard to get the dampening just right because the spring rate is always different.
MOOG Steering & Suspension | Coil Springs – Restore Ride Height and Proper Handling
Linear vs progressive rate springs | Automotive Thinker - Discussing the finer points of automobiles

I'd recommend looking into getting KWV3s. They don't drop the car much and are good all around.

For what you want, I would also recommend the V3's. They are a nice ride around town, and you can still get a reasonably stiff ride on the track. They are two way adjustable, so you can play with the clickers and get it to how you like it.

On a side note, I bet it's nice being able to do Fuji once a month!

Honestly, other that simply astetics and based on what your looking for, you might want to stay with the stock setup, it's really not bad IMO.

With your well endowed budget, good option is just get a set of custom valved shocks for your oem nismo springs. I am unsure if you can get the ride height you want with V3.

With that price range you can get a custom set of coils with the ride height you want along with spring rates. Call up bc and tell them what you want and the ride height you want then get it corner balanced

Get some Aragosta's. Your in Japan. I have a set for my Nismo I am going to put on the first of next year.

There are some HKS Hipermax IVs on Croooober for 79900 yen. Not sure if you were looking for new only.
These are decent from reviews I've read, and I plan on picking some up while I'm here.

Tein street flex coilovers with EDFC active pro electronic dampening. Just installed this setup on my 15 Nismo because I didnt like the rough ride around town and i love it. I was beyond impressed.

The EDFC electronic dampening allows you to set dampening presets for every situation and adjust on the fly. Soft dampening for daily driving, sport for around town when you want to have fun, and a full stiff set up for the track. All 4 corners are customizable to your liking.

You can also get the GPS option which is essentially an auto mode, it will automatically adjust depending on the change in G force. It adapts to how hard you accelerating/decelerating and corner.

I have the HKS hypermax GT4 coilovers because I wanted better performance than the sport package offered yet I wanted to retain a streetable ride. I really do love them. Great quality product and I've done several four and six hour trips in the car without giving it a second thought. I would really recommend checking them out. Also you in Japan so I imagine it would be hard to get your hands on a set from HKS.

thanks for the all the replay,
i was thinking about the tein mono sports edfc pro because of the price it around 1400us, it a good price and they have heavy support in japan easy to get them rebuild even long after they stop manufacturing products,

i have used tein before in rx-8 and i love them but i was thinking maybe there is something better then tein`s out there.

A the moment i am thinking of have sort of narrowed down to
kwv3, ohlins DFV, Tein does 3 suspension but i would love to here more about what peoples thinks.

i am intrested in the Aragosta's susepsion i know they are very good suspension but there is not much information about them in installed in 370z

The Ohlins listed on their website is for a 350Z. I've never seen a set for the 370Z listed.

Got to get a couple of SPL parts ordered and I will do my install next year sometime. Good friend of mine moved to the Philippines 7 years ago and he got sick this year. Took my suspension fund and gave it to his son for Christmas so he can get back state side. He may have lung cancer, don't know yet. This is the guy that got me into Z's in the first place.

if you are considering higher end coilovers, Topline Aragosta may be a good choice for its strong local support. You always want easy/local access on getting these high end shocks serviced.

There's no off the shelf Ohlins DFV for 370z.