Just curious what your guys' opinions of certain springs were. I want a pretty good drop but still try to maintain a smooth enough ride. I have a sedan, so i know if i pick up springs for a g35 coupe or a 350z it will drop lower than if i were to buy aftermarket sedan springs, i've been looking at

-Tein s-tech (350z)
-Tein h-tech (350z)
-Tanabe GF210 (350z)
-Tanabe NF210 (350z)
-Megan racing (350z)
-Eibach pro kit (350z)
-Eibach sport line (350z)

Based on these options and your guys' knowledge what spring do you think would give me a good drop on my sedan while still giving me a pretty close to stock ride quality (lol)? Any help would be appreciated

 

Your statement is contradicting.

 

lmao^^

I'm assuming he meant stock ride quality??

 

**** sorry guys, i meant ride quality haha. Not so much stock ride quality, i know that you cant be lowered on just springs with stock ride quality, i was more looking for which one of those spring set ups would yield the best ride quality out of the group, since i dont have experience with them

 

Bump for some useful information. Curious on the ride qualities of the various springs. Should have named the thread "Tanabe vs. Eibach vs. Megan vs. Tein" etc.

 

My Tein S-techs had a nice drop with about the same ride quality as oem.

 

I think you should choose how low you want to be first... you have a variety of ride heights involved in that shuffle and it would be a lot easier to pick a spring that suits you best ride wise after you choose a height you are going for.

 

i would like to close the wheel gap, but i know with a newborn son that goal isnt practical right now, all of my past cars i've owned have been very low, but for this one i'll probably drop between 1.5-2". As of right now im leaning towards the eibach sportline springs, which i believe is a 1.6" drop. Anyone have some experience with those?

 

Yo 35G'D UP,

On balance I tried to weigh the factors other responders alluded to - how low? (to avoid smashing undercarriage components up), ride quality (spring rates), body roll, wheel gap, etc. - and went with the 350Z H-Techs after the following research.......before/after pics below.

But regardless of what you choose, no real bad choices, and to each his/her own:

2006 G35 Coupe Spring Rates w/sport suspension:

FRONT: Same spring rates as stock - 314 lb.
REAR: Spring rate increase of 24% - 427 lb. (from stock 342 #)

So, after doing alot of research and in the interest of 1 and 2:

1) Not wanting to need a camber kit for more than a .8 inch drop to get back to mfg. spec, and

2) Wanting to keep spring rates as close as possible to sport-package or sport-tuned suspension spec.........

My next mod:

TEIN "H-Tech" Peformance Lowering Suspension Springs 03-08 Nissan 350Z

Spring Rate Front: 358 lb./inch

Spring Rate Rear: 375 lb./inch

Ride Height Lowering Front: 350Z - 0.3 inches (7mm) / G35 Coupe .08 inches

Ride Height Lowering Rear: 350Z - 0.2 inches (4mm) / G35 Coupe .07 inches

(Will post pics when I'm done.)************************************************** *********
AUGUST 2010:

Had Tein 350Z "H-Tech" Springs installed a few days ago..........pics later.

Alignment went back to within manufacturer's spec or acceptable range,no camber ket needed.

Springs seemed to have settled, and while noticeble to me - especially from behind the wheel, the drop is barely noticeable to the untrained eye.

Whatever.

Bottom Line: Now I have a PROPER sport package, and the lower ride combined with my Rear-Active Steering, the BMW 3 - even this generation - is beatable at all times. No more weaknesses in my setup to exploit. Brang it onnnn!!

Not to mention, I don't know what Nissan-Infiniti engineers were thinking when they decided to only up rear spring rates in the sport-suspension package, but who cares?

Rides better, handles better, accelerates smoother w/less drag (duhh!), no noticeable negatives regarding the different spring rates, etc........yet.

Next mod: Tokico HP Blue Shocks
************************************************** ***********

Otherwise, rock on.........before on the left:

 

if you're looking for a similiar to stock ride quality(lol) but want a decent drop go with tanabe df210shttp://www.tanabe-usa.com/df210.asp?id=1

Never had df springs personally(i've ran the nf and gf) but I know people that are very happy with them

 

Thanks for the info Bozo954 and FlyingMustache, is that blue sedan on the tanabe DF210?

 

Anytime, dude.

Oh! And if I could add one thing after reading Flying Moustachio's comment, G35 Coupe Tanabe NF 210s were my 2nd choice..........DF210s my 3rd.

Tanabes or Teins seemed to be the best choices for my desired setup.

And as he (I think) stated, for straight springs - not coilovers - not one bad report; all happy campers.

Here some of what I looked at:

dholly
Over 2,500 Posts
Join Date: May 2003
Location: Upstate NYPosts: 3,841

________________________________________
The H-Tech use spring rates that are softer than OEM and transfer a large amount of roll stiffness to the front, meaning they will increase understeer.

Tein H-tech for G35 Sedan (SKP14-BUB00)
F/R Progressive - spring rates listed rates are final rates
324/263
F drop –1.4”
R drop –0.7”
Tein H-tech for G35 Sedan front to rear spring rate balance vs. OEM balance
-7% front / -35% rear (28% transfer to front)

Here is a bunch of spring rate, sway bar, coilover etc. info I copied a while back from a post by Gsedan35 worthy of reposting:

Quote:
Stock Coupe 6MT Spring rates are the same rate as the 350Z spring and the sedan with the sport suspension.

314/342……..Rear – 427 with Sport-Tuned Suspension Package. -

Here are the spring rates in comparision to all known lowering spring/coilover product made for the Z33/CPV35/V35. If a product is not listed, that maker refused to give out the info.

Eibach's as noted (first number is the softer initial rate, followed by the higher final rate)
350Z 296/384 front 316/421 rear
G35c 229/337 front 274/463 rear
G35s 259/334 front 359/413 rear

RSR 350Z springs (just a wee bit progressive F&R, maybe one coil is progressive)
345/417 F+10% R+22%
Transfers +12% roll stiffness to rear

RSR G35 coupe springs (progressive front and rear)
315/315 F+0 R-8%
Transfers +8% roll stiffness to front

Hotchkis 350Z springs (linear springs)
340/330 F+8% R-3%
Transfers +12% roll stiffness to front

Tein S-tech 350z (fronts are progressive, rears are linear)
386/402 F+23% R+16%
Transfers +7% roll stiffness to front

Tein H-tech 350z (fronts are progressive, rears are linear)
358/375 F+14% R+11%
Transfers +3% roll stiffness to front

Tein H-tech G35 coupe & sedan(fronts are progressive, rears are linear)
324/260 F+ 5% R-22%
Transfers +27% roll stiffness to front

Tein S-tech G35 coupe & sedan (fronts are progressive, rears are linear)
358/274 R+14% R-18%
Transfers +32% roll stiffness to front

Tanabe GF210 Series 350Z
336/375 F+7% R+10%
Transfers +3% roll stiffness to rear

Tanabe NF210 Series 350Z
314/353 F+0 R+3%
Transfers +3% roll stiffness to rear

Tanabe NF210 Springs G35 COUPE
297/336 F-5% R-2%
Transfers +3% roll stiffness to front

Tanabe DF210 Springs G35 COUPE
308/353 F-2% R+3%
Transfers +5% roll stiffness to front

Tanabe NF210 Springs G35 SEDAN
297/269 F-5% R-21%
Transfers 17% roll stiffness to front

Tanabe DF210 Springs G35 SEDAN
286/280 F-9% R-18%
Transfers +9 roll stiffness to rear

Kg/mm springs 350Z
DR21 super sport 15mm drop
246/398 front 252/409 rear

Kg/mm springs 350Z
DRacing 30mm drop
252/454 front 252/482 rear

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 extreamly 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 absolutley 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)
409/460F F+30% R+37%
Transfers +7% roll stiffness to rear

Espelir 350Z springs
381/460 F+22% R+37%
Transfers +15% roll stiffness to rear

Tein Flex
672/672 F+114% R+98
Transfers +16% roll stiffness to front

Tein Flex JDM specs (can be special ordered est 6-8 weeks delivery)
560/560 F+78% R+64%
Transfers 14% roll stiffness to front

Tein Basic
504/504 F+61% R+43%
Transfers +18% roll stiffness to front

Tein CS (Monotube)
392/392 F+25% R15%
Transfers +10% roll stiffness to front

Nismo S-tune (uses progressive springs, especially in rear)
350Z/G35 Coupe
448/504 F+43% R+48%
Transfers +5% roll stiffness to rear

Nismo S-tune (uses progressive springs)
G35 Sedan
347/342 F+10% R+0%
Transfers 10% roll stiffness to front

Buddy Club Racing Spec coilover (Monotube)
748/280*
(very likely run's rear springs on the dampner body and not at the oem rear spring location)

Jic Flta-2 350Z fitment (Monotube)
560/672 F+78% R+98%
Transfers +20% roll stiffness to rear

Jic Flta-2 G35 coupe (Monotube)
560/560 F+78% R+64% $1750
Transfers 14% roll stiffness to front

Jic Flta-2 G35 sedan (Monotube)
504/392 F+61% R+15%
Transfers +46% roll stiffness to front

Cusco Zero 1&2
560/392 F+78% R+15%
Transfers +63% roll stiffness to front (no they do not run their rear springs on the dampner body, oem location, seen them on the car with my own eyes.)

HKS LS+ (rear springs are progressive)
496/440 +58%front +29%rear
transfers 29% roll stiffness to the front

HKS LS G35
448/336 43%front -1%
transfers 44% roll stiffness to the front

HKS LS 350z
448/448 43%front +31%
transfers 12% roll stiffness to the front

HKS II 504/504 +61%front +47%rear $1600
transfers 14% roll stiffness to the front

KW coilovers Variant's 1,2&3
Variant 3's are noteworthy as the only known coilover for these cars where the dampners are adjustable for compression and rebound independently. They also differ in using progressive springs front and rear
Front: 485lbs to 525Lbs Rear: 240Lbs to 548Lbs

D2 Racing Coilovers (Monotube)
840/728 F+168% R+113% (wee bit stiff eh, the recommended rate to)
Transfers 55% roll stiffness to front
Basically the increased roll stiffness to the front of the vehicle will add more understeer. The percentages which are positive will have a more harsh or more stiff ride than stock. Negative numbers will be softer. The farther away the spring rates get from zero, the faster the stock shocks will wear out (unless you are considering coilovers).

As you might notice, the Tein H-Techs for the 350Z add the least amount of additional understeer (w/o adding to oversteer) keep the springs rates closest to stock, allow a 0.8" drop in the front and a 0.7" drop in the back for a G35 coupe and a drop of 0.3" in the front and 0.2" drop in the back for a 350Z. They also should not wear out the stock shocks too fast as the spring rates are mildly more stiff than stock, yet you get a nice subtile drop. By adding to a coupe, you should stay within the stock camber and toe ranges, thus not having to add camber/control arms and toe bolts.

When calculating drop for a sedan, you can use the drop of a coupe +7/8". IIRC, 7/8" is the diff between the spring height of G coupe and sedan but I'm sure someone will correrct me if I'm wrong.
__________________

 

isnt it better when going a little bit lower to try to have the springs a bit stiffer than oem? right now those 350z S-techs are looking pretty good

 

Uh, not sure on what the right answer to that is.............someone with more technical expertise, please!!??

But what I do know is that if you go lower than .8, you may need a camber kit to get it back to within the proper manufacturer's alignment ranges.

And that was high on my value list - avoiding the need for a camber kit.

Also, from what I understand, the higher the spring rate the more stress on the OEM shocks.

So, changing shocks simultaneously - or at least, being prepared to replace them soon, would be another consideration regarding spring rates.

I'm still learning alot, though, and I'm sure there are others that can weigh in and/or tweak what I've said.

 

Yeah i think you're right, i'll probably just end up either getting the eibach sportline kit or the s-techs, but so far it seems like not alot of people use the sportlines on this site. It says the S-techs drop 1.5" all around which should be good enough for me. My old cars were REALLY low, like maybe 1.5" ground clearance, tucking more than half the tire on a 15" wheel, dont want to deal with all the problems of being slammed again