I'm looking for springs that won't require me to get a camber kit (I spoke to a lot of people who own both and say that they could get into specs without a camber kit on each kit). Anyway I'm also looking for performance, I want springs that are better than stock or the same, I don't want to sacrifice overall performance/ride for just looks.
So as far as good performance, looks good with 20" wheels, and just are overall GREAT springs, which one would you recommend?

OKAY I FOUND A THREAD WITH LOTS OF INFO ON SPRINGS RATES,ETC, BUT IT ALL MEANS NOTHING TO ME STILL, BY THE INFORMATION GIVEN BELOW WHICH SPRINGS WOULD YOU THINK IS BEST??

NOTE!: Any aftermarket 350Z spring will lower a coupe a additional ½” over and beyond the published drop amount for the 350Z. For sedan owners, the same applies to you, except you will gain a additional 1”, not just ½”

Oem springs G35 coupes with oem 17’s & 18’s G35 sedan’s with sport suspension 350Z’s 2003/2004
Front:314 Rear:342

Oem springs G35 coupes 2005/2006 with oem 19’s only 350Z 2004.5 to 2006
Front:314 Rear:427

Any spring or coil over that has “stiffer then oem springs by” does not factor in the higher rear spring rates of 2005 coupes with oem 19’s or 04.5+ oem 350Z’s

Eibach 350Z progressive springs 1”/1” drop* on 350Z G35 drops will be higher
Spring rates in LBS initial/final front 296/384 initial/final rear 316/421
F +22% R +23% (looking at peak rates only)

Eibach G35 Coupe progressive springs 1.1”/1” drop on G35 coupe
Spring rates in LBS initial/final front 229/337 initial/final rear 274/463
F +7% R +35% (looking at peak rates only)

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)
Side Note: The sedan Eibachs were developed on a non sport sedan, they did not use a sport suspended car to do the R&D work.

Eibach 350Z sportline progressive springs 1.2"/1.2" drop G35 drops will be higher
F: 239/400 R: 257/435

Eibach G35 Sedan sportline progressive springs 1.6"/1.6" drop
F: 171/400 R: 285-502

RSR 350Z linear springs .6”/.6” drop on 350Z G35 drops will be higher
Spring rates in LBS 345/417
Stiffer then oem by F+10% R+22% (see note at very top)

RSR G35 coupe progressive springs 1”/1” G35 coupe drop
Spring rates in LBS 315/315
Stiffer or softer then oem springs by F+0 R-8% (see note at very top)

Hotchkis 350Z Linear springs .6”/.8” drop on 350Z G35 drops will be higher
Spring rates in lbs 340/330
Stiffer or softer then oem springs by F+8% R-3% (see note at very top)

Tein S-tech 350z (fronts are progressive, rears are linear) .7”/.6” drop on 350Z G35 drops will be higher
Spring rates in lbs 386/402 (final rates only, softer initial front progressive rate unknown)
Stiffer then oem by F+23% R+16% (see note at very top)

Tein H-tech 350z linear springs .3”/.2” drop on 350Z G35 drop will be higher
Spring rates in LBS 358/375
Stiffer then oem springs by F+14% R+11% (see note at very top)

Tein H-tech G35 coupe & sedan(fronts are progressive, rears are linear)
Spring rates in lbs 324/260 (final rates only, softer intial front progressive rate unknown)
Stiffer or softer then oem springs by F+ 5% R-22% (see note at very top)

Tein S-tech G35 coupe & sedan (fronts are progressive, rears are linear)
Spring rates in LBS 358/274 (final rates only, softer intial front progressive rate unknown)
Stiffer or softer then oem springs by R+14% R-18% (see note at very top)

Tokico D-spec shock & spring package
G35 - DSK507 - 240f/300r - Linear Springs
350Z - DSK512 - 375f/375r - Linear Springs 1"/1"

Tanabe GF210 Series 350Z progressive springs 1”/1.2” drop on 350Z G35 drops will be higher
Spring rates in LBS 336/375 (only peak rates are published, softer initial progressive rates unknown)
Stiffer then oem springs by F+7% R+10% (see note at very top)

Tanabe NF210 Series 350Z progressive springs 1.2”/1.2” drop on 350Z G35 drops will be higher
Spring rates in LBS 314/353
Stiffer then oem springs by F+0 R+3%

Tanabe NF210 Springs G35 COUPE progressive springs 1”/,6” drop on G35 coupe G35 sedan drop will be higher
Spring rates in LBS 297/336
Softer then oem springs by F-5% R-2%

Tanabe DF210 G35 COUPE progressive springs 1.7”/1.3” drop on G35 coupe, G35 sedan drop will be higher
Spring rates in LBS 308/353
Stiffer or softer then oem springs by F-2% R+3% (see note at top)

Tanabe NF210 G35 SEDAN progressive springs 1.6”/.9” drop on G35 sedan
Spring rates in LBS 297/269
Softer then oem springs by F-5% R-21%

Tanabe DF210 G35 SEDAN progressive springs 1.7”/1.5” drop on G35 sedan
Spring rates in LBS 286/280
Softer then oem springs by F-9% R-18%

Swift 350Z linear springs .8”/.6” drop on 350Z, G35 drop will be higher)
Spring rates in LBS 336/364

Swift G35 coupe linear springs 1”/.6” drop on G coupe, G35 sedan drop will be higher)
Spring rates in LBS 280/314 (softer then oem)

Nismo T2 350Z Linear springs 1”/1” drop on 350Z
DO NOT buy these springs!!!, insanely far too stiff for use with anything but revalved Koni shocks
Listed for information ONLY!
Spring rates in LBS 625/700

Vogtland 350z progressive springs 1”/1” drop on 350Z G35 drop will be higher
Spring rates in LBS initial/final front 257/354 initial/final rear 285/422

Kg/mm springs 350Z
DR21 super sport 15mm drop
Spring rates in lbs initial/final front 246/398 initial/final rear 252/409

Kg/mm springs 350Z
DRacing 30mm drop
Spring rates in LBS initial/final front 252/454 initial/final rear 252/482 rear

Whiteline 350Z linear springs (control)
Front: Part # 73219,
Spring rate 365 LBS Drop: .8"-1" (will be higher on a G35)
Rear: Part # 73220
Spring rate 445LBS Drop: 1"-1.2" (will be higher on a G35)
(sold as 2 front springs and 2 rear springs)
www.whiteline.com.au/store/

Espelir coupe springs (the U.S. importer recently changed specs, I do not believe the newly listed specs are correct, since the new one's are extremely high. And when I called the company to ask if the springs are linear or progressive, they told me Linear, turn's out they were absolutely wrong, they are in fact progressive. I show the old specs for those reasons, take it with a grain of salt, same thing for the 350Z fitment)

Espelir G35 coupe progressive springs 10mm drop F&R
409/460F F+30% R+37%
New specs Macklin now shows as follows
409/515 F+30% R+50%
[url]http://www.mackinindustries.com/md/espelir/Resources/coilsprings.pd[/url

Espelir 350Z progressive springs 10mm drop F&R
381/460 F+22% R+37%
New specs Macklin now shows as follows
386/515 F+22% R+50%

H&R sport springs G35 coupe (progressive springs)
1.1"/1" drop
no spring rate info H&R refuses to give it out, something that is critical to making a informed buying decision, buyer beware)

H&R sport springs G35 sedan (progressive springs)
1.3"/1.2"
no spring rate info H&R refuses to give it out, something that is critical to making a informed buying decision, buyer beware

H&R sport springs 350Z (progressive springs* {I'd to see a picture of the springs themselves)
1.3"/1" drop on 350Z, G35 drops will be higher
no spring rate info H&R refuses to give it out, something that is critical to making a informed buying decision, buyer beware

Tein Flex (twin tube construction, adjustable dampners
Full-length adjustment and height adjustment for separate setting of the height and spring preload
Spring rates 672/672
Stiffer then oem by F+114% R+98
Side Note: Extremely high spring rates mean even when the adjustable damping is set as low as possible, you may not find ride quality happiness, several reports of this setups harshness exist Yet a few owner comment’s of a “like stock ride quality” also exist. However given the fact that they use a spring stiffness that’s over 100% stiffer then oem, if ride quality is of concern, either hitch a ride in a car equipped with them or make a different choice. In addition, several review’s have been done by people actually having the original more softly sprung Tein Flex coilovers do not take their comments to mean the same as the one using the current product, the original product specs are listed below under Tein Flex JDM.

Tein Flex JDM specs (can be special ordered est 10-12 weeks delivery)
Full-length adjustment and height adjustment for separate setting of the height and spring preload
Spring rates 560/560
Stiffer then oem by F+78% R+64%
side Note: This is the original specs first offered in the U.S. with the Flex, shortly after it’s introduction the specs changed to those listed further above (672/672)

Tein Basic (twin tube construction, non adjustable dampners )
Spring rates 504/504
Stiffer then oem by F+61% R+43%
Side Note: Excellent value at it’s price point, drop's sedan's more then some of us care for.

Tein SS JDM (twin tube construction, adjustable dampners )
(JDM only at this time. 10-12 weeks delivery, come via ship)
Spring rates 392/314-392 (rear’s are progressive)
Stiffer then oem by F+25% R+15% at peak
*UPDATE*^ spring rate specs have been changed
350Z 280/394
G35 coupe 392/392
G35 sedan (listed as skyline pv35) 392/392
12/4/06 update
All 3 car's now show the same 392/392 rates and the same part# GSP24-B1AS3 Question is, did any 280/392 Z33 setups ever get manufactured?

Tein CS (Monotube constructionad, adjustable dampners )
Spring rates 392/392
Stiffer then oem by F+25% R15%

Nismo S-tune (twin tube construction, uses progressive springs)
350Z .8"/.8" drop
Spring rates 448/504
Stiffer then oem by F+43% R+48%

Nismo S-tune
G35 Coupe .8"/.8"
448/504

Nismo S-tune (twin tube construction, uses progressive springs, )
G35 Sedan 1"/1" drop
Spring rates 347/342
Stiffer then oem by F+10% R+0%

 

Eibach Pro Kit is great, just got them on and love them, You will need a camber kit though.

 

if you want your tires to last, youll want a to get a camber correction kit with any drop.

look into swift springs for performance and a slight drop.

 

Tanabe DF210 FTW~!

 

Hotchkis is good.

 

My 05 coupe came with sport suspension and I replaced those springs with 350Z H-Techs. I also had these springs on my 03 sedan. I am very happy with the performance and the drop. I did not need a camber kit and my car does not scrape anything. The cost for these springs is very reasonable. If I were going to get a camber kit for the front and rear and did not drive the car daily, I would go with the RS*R Ti2000 for the 350Z. Perfect drop and an excellent quality spring with spring rates very close to the stock sport suspension springs rates. These are about $300 which is twice the cost of the Tein's. Plus you will need the camber kits. Get the 350Z H-Techs and call it a day. You will not be disappointed with the performance or the drop.

 

i went with a set of swift springs with camber kits...should be on the car next week

 

Let me know how those look and feel, cuz they are softer than stock and well that might be a problem as far as performance for me.

 

Camber kit for front and rear? Or just rear?

You say eibach pro kit is great, does it feel better than stock? I don't really care about looks, I just want it to FEEL better than stock. and handle better, just perform better, I have stock sport tuned suspension on my car btw

 

You say I would need a camber kit with the http://www.streetlevelperformance.co...20Springs.html
(RS*R Ti2000)

It only drops 0.6front and 0.6 rear, why would I need a camber kit

 

because those are 350z springs. supposedly, they will drop the g ~0.5" more than they drop a z.

 

tanabe GF = sick drop

 

Jic Flta-2 350Z Z33FLTA2H
(Monotube construction, adjustable dampning)
Full-length adjustment and height adjustment for separate setting of the height and spring preload
Special Note: This setup is known for it’s extremely harsh steet ride quality, buyer beware get a ride and drive in a Z33 spec setup before you buy.
Spring rates560/672
Stiffer then oem by F+78% R+98%
Transfers +20% roll stiffness to rear
Note: We have seen this setup run with softer 504lbs rear springs , search post’s by FritzMan on my350z

Jic Flta-2 350Z Z33FLTA2S****
same as above but with softer progressive rear springs.
560/560.


Jic Flta-2 G35 coupe CPV35FLTA2
(Monotube, adjustable dampning)
Full-length adjustment and height adjustment for separate setting of the height and spring preload
Spring rates 560/560
Spec change!
I have no idea when this happened, but the Jic-Magic web site now show's the spring rates as 560/448

Jic Flta-2 G35 sedan (Monotube, adjustable dampning)
As of 1/06/07, this coilover is no longer listed on Jic's web site
Full-length adjustment and height adjustment for separate setting of the height and spring preload
Spring rates 504/392
Stiffer then oem by F+61% R+15%

FLT-A2-VIP Series
The new FLT-A2 VIP are made for the enthusiast that wants that extreme dropped look and high quality ride comfort. Shares many performance features as the FLT-A2's but made specifically for high end luxury vehicles.
G35 Sedan
Spring rates 504/336
(not really feeling the softer then oem rear rates, IMO would change to 392 or 448)

JIC FLT-A1 is a coilover suspension set up ideal for the enthusiast that will use the suspension on a daily basis and occasionally for the track. FLT-A1 features a 10 way adjustable damper. Street price $1375
350Z, Twin tube construction, 10 way adjustable, full height adjustable
Spring rates 560/560 Z33FLTA1**** (rear springs are progressive)

G35 Coupe, Twin tube construction, 10 way adjustable, full height adjustable
Spring rates 560/448

G35 Sedan, Twin tube construction, 10 way adjustable, full height adjustable
Spring rates 504/336
(not really feeling the softer them oem rear rates, IMO would change to 392 or 448)


Cusco Zero 1&2 Full-length adjustment and height adjustment for separate setting of the height and spring preload
Zero 1 has non adjustable dampning
Zero 2 has adjustable dampning
Spring rates 560/392
Stiffer then oem by F+78% R+15%

Bilstein PSS coil over (Monotube construction, non adjustable dampners)
Special Note: Mild spring rates, but Bilstein says the dampners are performance valved
Spring rates 370/240-420 (rear progressive)
Stiffer then oem by F +18% R +23% (at peak rear spring rate)
Note: be used to offer a 1” sedan drop, cost effective at $1195 shipped vs. Tein Basic’s you get monotube construction and minimum sedan drop is higher in the front (1” pss vs. 1.6” Basic)

Bilstein PSS9 coilover (Monotube construction, adjustable dampners)
Special Note: Mild spring rates, but Bilstein says the dampners are performance valved
Spring rates 370/240-420 (rear progressive)
Stiffer then oem by F +18% R +23% (at peak rear spring rate)

HKS LS+ G35 Coupe (Monotube construction, adjustable dampners)
Spring rates 504/448
Stiffer then oem by F+58% R+29% (rear springs are progressive)
Side Note: Has the unusual distiction of actually being valved stiffer then the same coilover made for the 350Z (though you can only see 350Z LS+’s in the JDM catalog).

HKS LS+ 350Z Monotube construction, adjustable dampners
Spring rates 448/448
Stiffer then oem by F +43% R +31%
Sidenote: Listed on HKS's Japan web site, but not on the US web site. These might actually be our RS coilover.

HKS LS G35 (Monotube construction, non adjustable dampners)
Spring rates 448/336
Stiffer then oem by F+43% R -1%
Special Note: A comfort ride system, compare to Tein CS coilover

HKS LS 350z (Monotube construction, non adjustable dampners)
Spring rates 448/448
Stiffer then oem by F +43% R +31%
Special Note: A comfort ride system, note higher rear spring rate vs. G35 application

HKS II (Monotube construction, adjustable dampners)
Spring rates 504/504
Spring rates F+61% R+47%
Special Note: sprung and valved to be HKS’s most aggressive product for the G35/350Z, it is a notch above the RS coil over on the track, compare to Tein Flex and Jic coilovers. May be very tuff to get, said to have been removed from the USDM HKS catalog and is now JDM only, or so I’ve heard.

HKS RS (Monotube construction, adjustable dampning)
Spring rates 448/448
Stiffer then oem by F+43% R+31%
Special Note: “Marketed” as HKS’s track coil over with a good street ride.
$1600 when on sale Owner review's have a simular flavor as the Zeal coilover's below, they are very will liked.

Stance coilovers (Monotube, true coilover in rear, 15 way adjustable dampning, full height adjustable
Spring rates 672/280*
*since rear springs are run on coilover body, they leverage more spring power to the rear wheel. To get the same spring power to the rear wheel as a 280lbs spring in the OEM location you would have to use a 448lbs spring.
CAUTION: Really good owner review's exist and at $1150 shipped they are a excellent value. But a number of owner's are experiencing issues with the lower shock mount bushing not being designed to carry the loads being asked of it since the oem setup was not designed to have the springs with the shocks. A new sperical bushing fix has been talked about, but hasn't been produced yet. One could alway's convert to a 448lbs spring setup in the oem location and avoid the whole issue.

 

Zeal function V6 coilover (Monotube construction, adjustable dampner) $2855
Full-length adjustment and height adjustment for separate setting of the height and spring preload
Spring rates 560/448
Stiffer then oem by F+78% R+31%
Note: Ok, yes they are expensive. But they are from a exceptional company with a exceptional reputation and posted owner reviews that match.
$2800
ahero4eternity
03-19-2007, 11:44 PM
KW coilovers Variant's 1,2&3
twintube construction,
V1=non adjustable dampning,
V2=adjustable damping,
V3=separate adjustability for compression damping AND rebound damping and is the only product of it’s kind at this time.
Spring rates Front 485lbs to 525Lbs Rear: 240Lbs to 548Lbs (progressive springs)
Notes: High progressive rear spring rate spread can be fixed easily with Eibach ESS springs in place of the KW rear springs, cheap fix at only $100 for a pair.

Eibach Pro street S coilovers
Drop range on 350Z 0.8 to 1.6" front same for the rear.
As per Eibach they are relabled KW variant 1 coilovers, springs are a different color simply because Eibach has them refinished red vs yellow.

Greddy Type S coilovers
Monotube, 32 way adjustable, full height adjustment
350Z and G35 coupe fitments have different part numbers and different spring free lengths
Spring rates 560/448
Note: Likely OEM supplied by Bc Racing

D2 Racing/Ksport Coilovers
Monotube constrution full length height adjustment separate from preload rear springs on coilover bodies
Spring rates in LBS 840/*728
*Rear springs are NOT run in the oem location, they are mounted on the rear dampners, where they leverage 23% greater force then springs located in the omen location, this difference show’s up below, look how much stiffer then omen springs this setup is.
Stiffer then omen springs by F+268% R+350%
Side Note:





Kg/mm DNA coilovers (this setup uses 4 springs on the rear of the car)
(Monotube construction, full length height adjustment separate from preload, adjustable dampners)
Spring rates in LBS Front 748 Rear progressive 336 to 672 + 280 linear on dampner
Stiffer then oem springs by F+238% R+233% to 331%

Buddy Club Racing spec coilovers (rear springs on dampners ONLY)
(Monotube construction, full length height adjustment separate from preload, adjustable dampners)
Spring rates in LBS Front 560 Rear 448*
Stiffer then oem by F +78% R +113%* (see note at very top)
With 336lbs rear springs R +64%*

*Ok, springs run in the rear oem location leverage 36% of their force to the wheels. Springs run on the oem dampner bodies like these coilovers, leverage a much greater amount of force to the wheels 59%.

R-SR I-shock coilovers (JDM only, R-SR USA may or may not be able to get them ) ride height 0mm to -30 mm on 350Z looking at pics, looks like they have full length height adjustment separate from preload with 46mm piston’s pretty sure they are monotubes Uses titanium springs (Ti2000)
http://www.rs-r.co.jp/products/shock/sports.htm
http://www.rs-r.co.jp/products/shock/pdf/z.pdf
Spring rates in LBS 560/504lbs

Silk Road SPEC-RM/A8 coilovers monotube 8 way adjustable dampners, full length height adjustment separate from preload
Spring rates in LBS 560/448
http://www.silkroad-jp.com/section/a8.html
$1699

*T1R Type-E Suspension systems (Monotube construction non adjustable dampners)
Full-length adjustment and height adjustment for separate setting of the height and spring preload
Spring rates: 672 lbs/ 448 lbs
Stiffer then oem by F+114% R+31%
Transfers +83% roll stiffness to the front
Notes* Listing on AJR’s web site has been pulled, pics of this setup are shown installed on 350z-tech.com, may or may not be inproduction.

Swift super mach coilovers
Spec’s unknown 560/448lbs?
http://www.swiftsprings.com/index.as...on=Custom&ID=5

Unitech racing/Truechoice Koni coilovers Shortned and revalved Koni shocks converted into coilovers, extensive R&D by the PerformanceNissan racing team, Unitech
Phase 3 have adjustable shocks Phase 4 are DA independent for bump/rebound
Spring rates in LBS 500/425






Moton Club sport dampners (coilovers) Monotube w/remote gas reservoir’s which feature adjustable gas pressure (100 to350 PSI) and are adjustable for bump and rebound separately.
Spring rates: Because of how they can adjust this is the only setup that allow's the end user the ability to run 300lbs to 1000lbs spring rates without the need to revalve. Simply change the gas pressure charge and adjust the dampning to suit your chosen spring rates
@$3500 (does not include the cost of springs)
http://www.350zmotoring.com/forums/s...ad.php?t=24459


Shocks

Tokico D-spec twin tube 8 way double adjustable (bump and rebound) gas shocks 2 fitment's are sold DSP-7 for the G35 and DSP-9 for the 350Z.
The only difference between the DSP-7 and 9 is that the rear shocks on the DSP-9 350Z fitment feature's shocks that have shorter shaft's (1" IIRC) The 2 fitment's are both valved the same. These shocks can be set from softer then oem G35 shock to stiffer then the oem 350Z shock, your choice depending on how you set them.
$489

Koni Sport SA twin tube shocks Single adjustable for rebound. All Koni shop services are available, repair, rebuild, revalve, reconfigure to double adjustable ect. Front shocks have separate spring perches, allowing the possible use of Koni coil over parts (which is how the true choice unit’s become coilovers)
$580 (if you find the right thread on my350Z)

Bilstein H.D. monotube gas shocks non adjustable oem replacements, not suited for use with stiffer then oem springs. Like the Koni's Bilstien does offer shop services, including lower revalve rates ($65 per shock)
$620

JRZ monotube DA shocks
$3500 Speedware Motorsports 425-869-5680
http://www.theracersgroup.com/parts/...cks/shocks.htm
Non-remote resevoir DA shocks with independent adjustment for compression and rebound dampning. Front shocks have built in adjustable spring perches.
Large 22mm piston rod for direct response compression control
Large 46mm piston for direct response rebound control
Large non-preloaded deflective disc stack for traction and smooth damping control
Orifice rebound adjustment for exact fluid control
Unique compression valving system in fluid/gas reservoir
Large gas volume capable of accepting large fluid displacements without harshness
Unique orifice adjustment for precise compression damping tuning
Very responsive damping force adjustment system

TcKline Racing DA shocks $419 each
These shocks are a double adjustable version of regular Koni SA shocks custom made for Tckline by Koni. They seperate adjustability for compression and rebound dampning via to seperate adjustment systems. They have their own valving specs totally seperate from Koni SA valving. They have a second spring perch grove cut on the front shocks that is 1" lower vs the front Koni SA shock that has a second grove cut 1/2" higher. Can handle up to 800lbs spring rates. Just like Koni SA shocks, these are a low pressure twin tube design.
http://www.tcklineracing.com/nonbmw.htm

 

I just put the Eibachs on last weekend because I had read that some people were able to get it align within specs. But when I took it to they shop they couldn't get everything in the green. My numbers are border line but I'm going to buy the A-arms and rear kit so their all in the green. And I don't have to worry about tires.

The ride is great much better then stock.

Here is the alignment sheet.