Hello everyone,

Just wondering if people can give me some input on the Eibach Springs / Bilstein Sprint shocks combination.

Handling is fine for me at the time, but I want to get wheels and will lower the car about an inch....I know that stock shocks do not go well with lowering springs but maybe I am wrong.

I'd prefer not to get a coilover kit because this is really expensive unless I go for no-name brands....

I appreciate everyone's input.

Sorry if the question has been asked before, I did search but didn't find info on this particular combo.

Cheers,

Manu

 

Bilstein H.D.'s are not valved for stiffer aftermarket springs, though they are certainly a better shock then oem. You are better off going with Koni's or Tokico D-specs. Bilstein's fee for revalving is cheap at $65 per, but pick the other shocks so you don't go down that road or find yourself compelled to go their in the future. I had H.D's on another car and learned this the hard way, though once revalved they were excellent (but still non adjustable).

How stock shocks work with aftermarket springs is a mixed bag. Most all lowering springs on the market were R&D'd with 2003 car's. From 03 to 04, those oem shocks have a lot of compression dampning and so so rebound control. If you go back to 03 and read spring review's, almost every review talks about weather or not said spring reduces "bounce" and "porposing". 04.5+ car's, have oem shocks that have less compression dampning and better rebound control. It's within reason that a 04.5" car will fair better on aftermarket shocks, though many 03-04 owner's like their oem shocks with aftermarket springs just fine. Point is, if you can afford the $500-$720 for Tokico D-specs or Koni sports, do it, they do have superior valving to oem.

 

Thanks a lot for all this info man I really appreciate it.

What do you think of Bilstein PSS9 ? It's a lot better priced than I previously thought...might go for that.

 

Most springs for the Z are no stiffer than stock...especially the Eibachs. I'm not a big fan of buying lowering springs and separate shocks because you can get Tein Basic's for about the same price and have hieght adjustment and stiffer springs.

 

Well,...............

Oem springs 350Z’s 2003/2004
Front:314 Rear:342

Oem springs 350Z 2004.5 to 2006
Front:314 Rear:427


Eibach 350Z progressive springs 1”/1” drop
Spring rates in LBS initial/final front 296/384 initial/final rear 316/421
F +22% R +23% (looking at peak rates only vs 03/04)

Eibach 350Z sportline progressive springs 1.2"/1.2"
Spring rates in LBS initial/final front: 239/400 rear: 257/435

RSR 350Z linear springs .6”/.6”
Spring rates in LBS 345/417
Stiffer then oem by F+10% R+22% (vs 03/04)

Hotchkis 350Z Linear springs .6”/.8”
Spring rates in lbs 340/330
Stiffer or softer then oem springs by F+8% R-3% (vs 03/04)

Tein S-tech 350z (fronts are progressive, rears are linear) .7”/.6”
Spring rates in lbs 386/402 (final rates only, softer initial front progressive rate unknown)
Stiffer then oem by F+23% R+16% (vs 03/04)

Tein H-tech 350z linear springs .3”/.2”
Spring rates in LBS 358/375
Stiffer then oem springs by F+14% R+11% (vs 03/04)

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

Tanabe GF210 Series 350Z progressive springs 1”/1.2” drop on 350Z
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% (vs 03/04)

Tanabe NF210 Series 350Z linear springs 1.2”/1.2”
Spring rates in LBS 314/353
Stiffer then oem springs by F+0 R+3% (vs 03/04)

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%

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


Nismo T2 350Z Linear springs 1”/1” drop on 350Z
Spring rates in LBS 625/700

Vogtland 350z progressive springs 1”/1”
Spring rates in LBS initial/final front 257/354 initial/final rear 285/422

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

Kg/mm springs progressive 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"
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 .4"/.4" (10mm) Peak rates only shown, softer inital rates unknown
386/515 F+22% R+50% (vs 03/04)

 

Simular spring rates vs prokit's, but the front's are linear. You get really good dampner's out of the deal that are adjustable. And you'll get height adjustablity too. I spoke with Bilstein technical support when they first came out, they can service them (even revalve them) here in the states just like their shocks.

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)

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