Maybe asking a bit here but, since we are in the G35 forum, it might be good to see a pic of the new G35 coupe springs to compare as well! I for one would like to see the difference if the G35 springs are progressive both f/r. Thanks

 

If koji@rs-r has a set on hand and was willing to take the pic and email it to me. I will host and post the pic.

 

The G35 are progressive front and rear. I will get a pic for you later today!

 

Koji - I just ordered these for my G35 Coupe - right or wrong spring to be ordering?

RSR-30-N200
RS-R Down Sus - 03+ 350Z/G35

 

You wanted to order the 350Z RSR spring for your coupe, right? If so, you ordered the right part number then.

 

G-Nite,

if you want the G35 specific spring, part number is:

30-N400

 

So, now I am all twisted up - whats the difference between the two?

 

Here's the run down.

30-N400
Drop: 1.0 front / 1.2 rear
Spring Rate: 315 front / 315 rear

30-N300
Drop: .6 front / .6 rear
Spring Rate: 345 front / 417 rear

Oem Spring rates:
314 front / 342 rear

If you want improved performance, get the 30-N300. If ride comfort is more important than performance enhancement, get the 30-N400

Sidenote:
The 30-N300 springs by not using softer than oem springs in the rear would help the car have less understeer or push.

30-N300 stiffness vs OEM
+10% front +23% a 13% transfer of roll stiffness to the rear

30-N400 stiffness vs OEM
+0% front rear -7%

 

Thanks -- Great Information

 

gsedan35-

actually, the part number is 30-N200 for the 350z springs, that fit in the G35, but are not meant for the G35. 30-N400 is the G35 specific spring.

 

How'd I get the N300 number DOH!, yep N200 is right.

http://www.rs-r.com/suspension_springs.htm

 

its all good gsedan!

 

I just ordered some 350Z specific RSR's for my Sport sedan and will report back after the install in a couple weeks.