AMai1215

iTrader: (3)

My 2012 G37 sedan (non-sport) is currently lowered on the Eibach Pro Kit. I'm beginning to feel the annoyance of having to slow down at every bump and going up/down driveways. Maybe it's time to change my springs to the OEM sport springs.

Does anyone know the difference in height from OEM non-sport VERSUS to OEM sport springs? And will the sport springs designed coupe fit on my sedan?

And any big difference from OEM sport springs VERSUS Eibach Pro Kit?

I'm currently running 20 x 8.5 all around and don't want it to look like it's raised, but do not mind a little gap.

Any input and help is greatly appreciated.

Thank you.

rks

iTrader: (6)

My OEM "S" springs must have been an anomaly because the gap was huge, like "check out my shiny control arms". The Eibachs didn't slam the ride but it looked a lot better and was worth the precautionary driving that any lowered G requires.

canucklehead

iTrader: (9)

eibach lowers 1.25-1.5" from S springs. yes it looks much better on eibachs, especially with 15-20mm spacers, but i did tire of scraping on speedbumps and driveways. i miss the Z-spring setup from my old G35 sedan! that was a perfect compromise between looks/performance and practicality, lowering 1" or just under.

i went back to stock S springs, but then added the eibach sways. i am very happy with the current setup. would i like a slightly lower ride for the looks? sure, but as far as i know there is nothing available to get a milder drop then eibach springs - which is the mildest drop i believe. it was still too much for my liking.

as for the non-S springs, i can't be sure. never had them. most folks say the X models (which all have the non-S springs) do sit higher. not sure how much though.

for more info i suggest checking for facts in the Tech section, suspension forum.

Blueslatek52

I have swift springs, after 2 weeks of driving i feel bad for slowing down traffic on bumps and Sh*tty roads....

AMai1215

iTrader: (3)

Thank you for your guy's input.

Canucklehead, you installed the springs from a Nissan Z on your car? There is a local guy selling his OEM springs that came off his 2012 Nissan Nismo 370Z. Would this be a better solution in terms of performance and practicality than the "S" springs?

canucklehead

iTrader: (9)

^ that was an awesome combo for the Gen-1 G sedan crowd. tons of 2003-2006 G sedan guys swapped out their stock springs for Z springs.

i do not know if the same swap is possible for the Gen-2 sedans. check in the Tech section, i'm sure that topic has been discussed. i remember seeing it in a thread or two. try the search function too!

blnewt

iTrader: (13)

Might look into Stance SS coilovers, should be able to drop it just as much as you want and they've use Swift springs, pretty good reviews from all I've read. These are true coilovers rather than the ones that use the lower control arm as the spring bucket.
Super Sport

dragion

iTrader: (2)

Regarding my research, the Z's rear spring does NOT fit on the 2012 sedan.

Here is my thread:
https://www.myg37.com/forums/g37-sed...t-springs.html

The best solution will be going with the Swifts...my $.02.

Rochester

iTrader: (9)

AFAIK, there is no none. The height on the RWD Sedan is identical at 57.2", with or without the Sport Package. The differences in suspension between the two are in the struts and sway bars.

AMai1215

iTrader: (3)

I'm considering getting the Stance SS coilovers or KWv1 now. Will I be able to get just a minimal (0.8"-1.0") drop with these?

socketz67

Are you sure? I thought the struts, springs (spring rate) and sway bars were all slightly different on the Sport model as springs and struts are normally matched in pairs for optimal dampning.

Question - on G35Driver, there is a thread that documents the spring rates of all the stock spring options for Sedans, Coupes and Zs. Where did that information come from originally? How does one get to the bottom of this as it would be good to know the various spring rates just as we did on the 1st gen.

Rochester

iTrader: (9)

...about my comment on the springs? No, I am not sure. I've been asking this question for some time now, and have still not established a definitive answer.

Here's what I know for sure:

• The damping on the struts is different between the RWD-Sport and RWD-nonsport.
• The RWD-Sport Swaybars are more stiff than RWD-nonsport.
• The height of the RWD-Sport is identical to the RWD-nonsport.
• On the Maxima, the only difference between sport and non-sport was the swaybar and the struts.

Since the height is the same, and Nissan has a M.O. of struts & sways on sport packages, my assumption is the springs are identical sport/nonsport.

Which is why I said AFAIK. But I still wouldn't bet the farm on it.

AMai1215

iTrader: (3)

Brad, are you able to provide me a part number for the Stance SS coilovers? I cannot find any G37 applications on their website.

blnewt

iTrader: (13)

It's the same as the 370z application, part #ST-Z34-SSO
here's a link, nice price too
The only thing I couldn't confirm is if it's the OEM type (the separate spring that goes in the lower control arm) or the true coilover, they make both so I think I'd contact Stance to get the proper part #. Both types have pros & cons, the OEM type is better supported since the shock is dispersed over a wider area but the true coilovers have more precise control since they're an integrated unit.
Stance Coilovers Super Sport 370z/G37
And another, TH Motorsports is a vendor on this site too!
Stance Coilovers - Super Sport NISSAN 370Z 2009 - 2013 ST-Z34-SSO
Might also shoot a PM over to Need4Speed, they're getting set up for a suspension blowout sale, might be able to do even better
https://www.myg37.com/forums/3679474-post3.html

AMai1215

iTrader: (3)

Will these be able to lower 0.8"-1.0" from stock height, at the same time provide the comfort and performance?