I’ve been looking into purchasing a set of springs for my Z for quite a long time now and still can not make a decision. Could you please help me decide between Eibach Pro v. Tanabe GF210. I know Eibach’s are progressive springs and Tanabe’s are linear. Let me get some feedback from you guys, positives and negatives going with either ones. I also know that Eibach’s lower the car 1”F/1”R and Tanabe’s 1”F/1.2”R. Are you using any Camber and Toe Adjusters? Thanks

 

i'm using the tanabe gf210 and no camber and no problems

 

Jesus....don't listen to this kind of person. No intelligence in modding.
If you lower your car more than .7 of an inch, your tires and shocks are going to be PISSED.

 

...so I need new shocks as well??? no way!

 

SPRINT

 

WOW! the drop on the Sprint springs is 1.75in. all around. That's a little too much of a drop man. The car looks great though.

 

If you want your tires to last you'll need a rear camber/toe kit installed and obviously a 4 wheel alignment afterwards.

 

Tanabe's are not linear, they are progressive as well
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)
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

 

im slammed on stance coilovers. -3 degrees up front and -4 out back. i have the cusco camber arm for the front and the camber arms for the back been lazy putting it on. but ive had them this way for 22k miles, surprisingly my camber wear isnt as bad as i thought it would be. prolly bcus im slightly toe in. anyways im rambling. i think you should get coilovers. and slam it. who cares about tires. hahahahahaha.

http://www.xanga.com/jchewy

 

Eibach bc that's what I have and I'm perfect

 

Got any pic?

 

tanabes are not straight linear - they are mildly progressive, just less so than Eibach

either is a good choice

 

Just installed my RS*Rs this last weekend - 15 mm drop all around. Its perfect - I can't stop staring at the newly improved stance.

 

Actually Adam it's the other way around. The GF210's have one additional progressive coil loop and will have a greater rate spread between the them and the Pro-kits. Even with 2 progressive coil's the Pro-kit's still have rate spread, though less then Sportlines.

Tanabe 350Z GF210


Eibach 350Z Pro-Kit

 

That's a 1.7" drop? Even my car with Nismo T2 Spring with 1" drop is more slammed that that...

 

That picture was taken the same day that I installed the springs/struts, so now, a year later, they have settled in. I'll get a new PIC this week.

 

i have an 03. are the tanabe gf210 or nf210 actually smoother and softer ride than what i have stock?

 

In all sincerity, your barking up the wrong tree. Your oem 03 shocks are doing way more to the car's ride quality then the springs are. You can bandaid things with progressive springs and get the drop you want to see. But to really deliver on what your after a more forgiving shock or one that can be adjusted to be more forgiving is in order. Better shocks will allow you to run what is actually a stiffer spring yet have improved ride and drive quality, yet hopefully stay off the bump stops in spite of being lowered.

Your oem 2003 are linear
Spring rates in LBS 314/342

Tanabe GF210 Series 350Z progressive springs 1”/1.2”
Spring rates in LBS 336/375 (only peak rates are published, softer initial progressive rates unknown)

Tanabe NF210 Series 350Z progressive springs 1.2”/1.2” higher
Spring rates in LBS 314/353

The NF210's are pretty much the same as oem, catch is you've given up 1.2" of suspension travel, yet you've done so with pretty much zero increase in spring stiffness vs oem. So where is the added protection to keep you off the bump stops which are very unforgiving in the front and cannot be trimmed.

In case it helps here's a full list of 350Z lowering springs with specs.

Oem baseline
2003-2004 (unrevised suspension)
314/342 linear

2004.5-2007 (revised suspension) includes all roadster production
314/427 linear

Eibach 350Z Pro-Kit progressive springs 1”/1”
Spring rates in LBS initial/final front 296/384 rear 316/421

Eibach 350Z Sportline progressive springs 1.2"/1.2"
Spring rates in LBS initial/final front 239/400 rear 257/435
Notice extreamly high rate spread between initial and final rates

RSR 350Z linear springs .6”/.6”
Spring rates in LBS 345/417

Hotchkis 350Z Linear springs .6”/.8”
Spring rates in lbs 340/330

Tein S-tech 350Z springs .7“.6“ (fronts are slightly progressive, rears are linear)
Spring rates in LBS 386/402

Tein H-tech 350z linear springs .3”/.2”
Spring rates in LBS 358/375

Progress Technology progressive springs 1.0”/1.0”
Spring rates in LBS 425/385 (final rates only, softer intial front progressive rate unknown)

Tanabe GF210 Series 350Z progressive springs 1”/1.2”
Spring rates in LBS 336/375 (only peak rates are published, softer initial progressive rates unknown)

Tanabe NF210 Series 350Z progressive springs 1.2”/1.2” higher
Spring rates in LBS 314/353

Swift 350Z linear springs .8”/.6”
Spring rates in LBS 336/364

Nismo T2 350Z Linear springs 1”/1”
Spring rates in LBS 625/700
Do NOT run them with OEM shocks of any kind

Vogtland 350z progressive springs 1”/1”
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 DRacing progressive springs 1.2”/1.2”
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"
Rear: Part # 73220
Spring rate 445LBS Drop: 1"-1.2"
(sold as 2 front springs and 2 rear springs)
www.whiteline.com.au/store/

Espelir 350Z progressive springs Drop .4"/.4"
Spring rates in LBS 386/515 (softer initial rates are unknown)

H&R sport 350Z progressive springs Drop 1.3"/1"
370/400 (softer initial rates are unknown may be simular to Sportline spread)

Tokico D-spec shock & spring package
350Z - DSK512 - 375f/375r - Linear Springs 1"/1.5"

Nismo S-tune shock & spring package (twin tube construction, uses progressive springs)
350Z .8"/.8" drop
Spring rates 448/504

 

what you'll find on the tanabes (I suspect, as I've seen it on many other of their applications) is the first several coils are "dead". One of these daysI'll get a set on the dyno and take a look