Best Spring Rates C34

[Zorro]

Ok guys, what do you think are the best spring rates for the rs4 c34?

[SMOKEYV35]

lot of people put R34 coilovers in and find that the back end is a bit soft - because of all the extra weight over the rear suspension that the wagon has over a sedan/coupe.

mine has got GT-R coilovers in it, but with higher spring rates in the back and i reckon it handles and rides pretty nice. i can find out toinght what the spring rates are for you, but from memory they are 12kg.

[RubyRS4]

I currently run 12kg front and 10kg rear (have done so for over 2 years) ... but downsizing to 10kg front and 8kg rear, as I'm growing tired of Adelaide "pot hole" roads.

So I would recommend 10kg front and 8kg rear.

[Zorro]

  RubyRS4 said:

I currently run 12kg front and 10kg rear (have done so for over 2 years) ... but downsizing to 10kg front and 8kg rear, as I'm growing tired of Adelaide "pot hole" roads.

So I would recommend 10kg front and 8kg rear.

Ok great thanks Ruby! Im looking at a set of coilovers at the moment, which have 9kg & 7kg! So thats fairly close, what do you think? Close enough or should i look for a set 1kg firmer?

[GoldZilla]

It might take a bit of reading, but have a look through this thread: http://www.skylinesaustralia.com/forums/St...ion-t53079.html

SydneyKid did a LOT of work early in the piece to find out heaps about the suspension in the Stagea and used to offer a kit that he'd developed (he's a suspension engineer) for Stageas, Skylines, S-chassis cars (S13/S14/S15), and quite a few other cars.

[Zorro]

  GoldZilla said:

It might take a bit of reading, but have a look through this thread: http://www.skylinesaustralia.com/forums/St...ion-t53079.html

SydneyKid did a LOT of work early in the piece to find out heaps about the suspension in the Stagea and used to offer a kit that he'd developed (he's a suspension engineer) for Stageas, Skylines, S-chassis cars (S13/S14/S15), and quite a few other cars.

Well that was a long and sometimes painful read, some interesting stuff in there too! While SK did obviously put in alot of effort in the early days of the stagea being in Aus, and much respect for the effort & shaing the info, i feel (with no disrespect intended) that he is rather conservative with his settings! 3kg springs really? I have king springs & the whiteline bars in the car at the moment and its waaaaaay tooooo soft & even the bars could do with the next size up X & XX, im not happy with the std setup at all! Well i think i will use that as a base line guide, but do it my own way & post the results when it all comes together (good or bad)!

Cheers for your input guys, i'll keep ya posted on my progress! (eventually we can compile an abstract or a definative guide to stagea suspension modding)! (rather than read a million pages)

[darrinspencer]

  Zorro said:

Well that was a long and sometimes painful read, some interesting stuff in there too! While SK did obviously put in alot of effort in the early days of the stagea being in Aus, and much respect for the effort & shaing the info, i feel (with no disrespect intended) that he is rather conservative with his settings! 3kg springs really? I have king springs & the whiteline bars in the car at the moment and its waaaaaay tooooo soft & even the bars could do with the next size up X & XX, im not happy with the std setup at all! Well i think i will use that as a base line guide, but do it my own way & post the results when it all comes together (good or bad)!

When Sydneykid did the kits, he had the springs made esp to his spec's. They are all sold now and it was not worth him getting 10 sets (min) order done. He advised me the closest other springs available were the King springs.

I ended up fitting these with a set of his Bilstiens. My opinion the springs are more than heavy enough. They are around 25% heavy than stock at around 4kg. Springs are R33 GTR front, R32 GTR rears in Low spec. Do not use super low spec.

You mentioned you have kings already, but what shocks have you got?

If they are stock than I would say that is why you think the kings are too soft. Any spring8kg or higher on the street to stiff for our crappy roads.

[StageaTypeS]

  SMOKEYC34 said:

lot of people put R34 coilovers in and find that the back end is a bit soft - because of all the extra weight over the rear suspension that the wagon has over a sedan/coupe.

mine has got GT-R coilovers in it, but with higher spring rates in the back and i reckon it handles and rides pretty nice. i can find out toinght what the spring rates are for you, but from memory they are 12kg.

FYI,

I found 8kg front with 6kg rear to be a good mix, thats what is in Smokeys car as it used to be mine. It was running R33 GTR Greddy Coilovers, these come with linear front springs and progressive rears, I swapped the rears out for 6kg linear eibach springs.

Eibach springs are probably about the best you can get if you are after springs as they have springs in almost every weight, diameter, length and they are awesome quality too. Also they are not that much probably pay around $4-500 for a set all around I reckon.

[wolverine]

I'm with Darrin

I run the stock RS4S springs (not sure is they are the same as RS4 springs) with Bilsteins and 22mm solid front and 24mm solid rear sway bar.

I beats me how this wouldn't be firm enough on Australian roads.

[matt-turner]

hey mate i have isc coilovers i brought around a year and a half ago which came with 12kg fronts and 10kgs rear i found it just to stiff so i just recently brought 8kg front 6kg rear springs and so far so good alot softer than before . car still handles great

[dirtyRS4]

I have tein s-tech springs specifically for WGNC34. They are rated at 3.6kg front and 3.8kg rear. They arent stupid low either. I have a R33 GTR swaybar to fit on the front and 24mm whiteline solid swaybar coming soon. Good for most road conditions. SK Bilsteins with adjustable circlip would be ideal. Track cars run a stiffer setup.

Edited November 18, 2010 by dirtyRS4

[Zorro]

I just bought HKS coilovers, with a few sets of springs 5->9kgs, so i will play around and see how its goes! (i like to drive pretty hard through the hills, wanted a gtr, but needed a wagon, so.... super stagea it is)

[wolverine]

What size sway bars do you have on there at present?

[Zorro]

Using the same as what SK recommended (on full hard), see how the coilovers go, but i was going to go the next size up!

[wolverine]

As long as you have upgraded the sway bars to control the roll then the spring/shock combo can mostly spend its time controlling vertical changes.

From here it comes down to personal choice so if you weren't happy with the firmness then going up in spring rates is a fair thing.