Jump to content
SAU Community

Recommended Posts

Hey guys!

I have a R32 GTS4 with a set of HSD HR coilovers - spring, 15 step damper and height adjustable.

Now, these coilovers came off a GTST - I changed the rear bottom mounting cups to mate the GTR/S4 suspenion set up.

HSD HR spring rates for a 32 GTST are: Front-8 Rear-6

HSD HR spring rates for a 32 GTR (So GTS4 aswel) are: Front-9 Rear-7

Now in mid corner the car would become very unsettled, oversteer very easily, be unpredictable and kinda "skipps" accross the slightest uneven surfaces.

Its really quite scary, because you cant feel oversteer begining to come in, it just slid out of no where.

Now I was talking to a GTR owner during the hill climbs at Bathurst, and he said he had the same problem, swapped the speings at the rear for 5kg's and was cheering.

So, will a 5kg spring sort things out?

Whats a stock rear spring rate for a 32 GTS4?

How do I know how far to dial up the damper settings to make up for th softer spring?

Does it matter if its a 4 door? Weight distribution?

Do i need to check anything on the new springs besides, spring rate, id diameter and length? Would brands matter?

I realise its a bit of a bastardized suspension set up, but hey, it cost me $50 for almost new coilovers.

Could this set up work? HSD HR GTST front coilover:8kg & HSD HR GTST rear coilover with 5kg spring by what ever brand?

Any help is much appreciated

Thanks guys!

Edited by GTS4WD

do you have adjustable sway bars in it? If so soften the rear a touch.

If not, then yes, a softer rear spring will help.

You can also play with more rear toe in.

As far as the adjustable damper goes; you are adjusting both bump and rebound at the same time so you need to find a happy medium. I generally would go somewhere around 10-11 front and rear and pretty much leave it or go up, but not down. I tend to think if you go too soft on the damper thinking that it will soften that end of the car then you aren't controlling the spring properly, particularly higher spring rates, which can lead very similar issues to what you are describing...

Wow.. that acctually makes allot of sence. Because thats exactly what I did! hahaha.

I never really touched the front dampers. I put a front strut bar and GTR bonnet, so I lessened the weight and stiffened it, so im happy with the front. Feels great, direct, no understeer etc. Dampers are set at 0. Should i be increasing them to further change the ratio front/rear?

You have to excuse me. Im not inept in terms of suspension. But im not fluent in its techincalities. Its by far the most difficult part of a car to grasp, understand and disect.

Current specs are:

ride height- front 350mm rear 345mm

alignment- front 1;5 deg neg camber, 5 degree caster, 1mm toe out, rear 1.30 deg neg camber,

2mm toe in per side

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Latest Posts

    • My thinking is that if the O2 sensor is shot then your entire above described experience is pure placebo.
    • Here is the mess that I made. That filler there was successful in filling dents in that area. But in the middle area. I can feel dents. And I've gone ocer it multiple times with filler. And the filler is no longer there because i accidently sanded it away. I've chased my tail on this job but this is something else lol. So I'm gonna attempt filler one more time and if it doesn't work I'll just high fill primer the door and see where the issues are because guidecoat is of no use atm.
    • Ok, so I think I sort of figured out where I went wrong. So I definitely overthinked it, and I over sanded, which is probably a large part of the problem. to fix it, I ended up tapping some spots that were likely to be high, made them low, filled them in, and I tackled small sections at a time, and it feels a lot better.    I think what confused me as well is you have the bare metal, and some spots darker and some are lighter, and when I run my finger across it, it' would feel like it's a low spot, but I think it's just a transition in different texture from metal to body filler.    When your finger's sliding on the body filler, and crosses over to the bare metal, going back and forth, it feels like it's a low spot. So I kept putting filler there and sanding, but I think it was just a transition in texture, nothing to do with the low or high spot. But the panel's feels a lot better, and I'm just going to end up priming it, and then I'll block it after with guide coat.   Ended up wasting just about all of my filler on this damn door lol  
    • -10 is plenty for running to an oil cooler. When you look at oil feeds, like power steering feeds, they're much smaller, and then just a larger hose size to move volume in less pressure. No need for -12. Even on the race cars, like Duncans, and endurance cars, most of them are all running -10 and everything works perfectly fine, temps are under control, and there's no restrictions.
    • Update: O2 sensor in my downpipe turned out to be faulty when I plugged in to the Haltech software. Was getting a "open circuit" warning. Tons of carbon buildup on it, probably from when I was running rich for a while before getting it corrected. Replaced with new unit and test drove again. The shuffle still happens, albeit far less now. I am not able to replicate it as reliably and it no longer happens at the same RPM levels as before. The only time I was able to hear it was in 5th going uphill and another time in 5th where there was no noticeable incline but applying more throttle first sped it up and then cleared it. Then once in 4th when I slightly lifted the throttle going over a bump but cleared right after. My understanding is that with the O2 sensor out, the ECU relies entirely on the MAP tune and isn't able to make its small adjustments based on the sensors reading. All in all, a big improvement, though not the silver bullet. Will try validating the actuators are set up correctly, and potentially setting up shop time to tune the boost controller on closed loop rather than the open loop it is set to now. Think if it's set up on closed loop to take the O2 reading, that should deal with these last bits. Will try to update again as I go. 
×
×
  • Create New...