Jump to content
SAU Community

Recommended Posts

I have previously read a couple of threads on these coilovers and am just about to purchase the HS version ones... Has anybody been running these on their car? How are they to live with day to day and how do they perform (occasional track/motorkhana/drags use)?

They come with 8kgF and 7kgR springs but I was going to get some 6kg springs for the rear and put the 7kg ones in the front... The guys at Otomoto said to try them with the harder springs first before I pay the extra $100 for the softer ones... opinions?

then I will be putting some whiteline swaybars and some camber correction bushes so I can wind the coilovers down nice and low :)

can't wait... the stock shocks/king springs combo is now very sloppy...scratch that read, completely and utterly rubbish!

any comments appreciated

Link to comment
https://www.sau.com.au/forums/topic/79721-hd-systems-coilovers/
Share on other sites

I have previously read a couple of threads on these coilovers and am just about to purchase the HS version ones... Has anybody been running these on their car? How are they to live with day to day and how do they perform (occasional track/motorkhana/drags use)?  

They come with 8kgF and 7kgR springs but I was going to get some 6kg springs for the rear and put the 7kg ones in the front... The guys at Otomoto said to try them with the harder springs first before I pay the extra $100 for the softer ones... opinions?

then I will be putting some whiteline swaybars and some camber correction bushes so I can wind the coilovers down nice and low :(  

can't wait... the stock shocks/king springs combo is now very sloppy...scratch that read, completely and utterly rubbish!

any comments appreciated

Front

8kg/mm = 450 lbs/inch

Standard is 165 lbs /inch

Whiteline lowered is 225 lbs/inch (4kg/mm)

Kings lowered is 250 lbs/inch

How do you think it is going to ride with a 275% increase in spring rate? :idea:

Rear

7kg/mm = 390 lbs/inch

Standard is 125 lbs /inch

Whiteline lowered is 165 lbs/inch (3kg/mm)

Kings lowered is 185 lbs/inch

How much traction do you think it is going to have with a 290% increase in rear spring rate? :idea:

In the race cars on R type tyres we NEVER run over 250 lbs/inch rear spring rate, 390lbs/inch is UNTHINKABLE.

There is plenty written on this subject, do a search if you want more detail.

;)

PS; low is slow.

sydney kid, i don't race cars and nor am i a suspension specialist, but my mates S15 silvia has tein coilovers with 9kg fronts and 7kg/mm rears spring rates. He circuit races it but it still drives really nice on most roads, unless it is really full of pot holes. Traction isn't an issue either. It has a HKS GTRS running 1.30bar and makes over 350rwhp and only really bags it in first gear, as soon as second hits it grips and goes like the clappers. He does use the Dunlop DZ02G semi slicks, which probably helps on the track, but he drives on these all day everyday, and even without heating them up, they still don't spin much at all, and corners like no tomorrow.

As i said i'm no professor when it comes to suspension, but my Personal Opinion Is : I think with the right driving style and tyre combination, it will all work out.

sydney kid, i don't race cars and nor am i a suspension specialist, but my mates S15 silvia has tein coilovers with 9kg fronts and 7kg/mm rears spring rates. He circuit races it but it still drives really nice on most roads, unless it is really full of pot holes. Traction isn't an issue either. It has a HKS GTRS running 1.30bar and makes over 350rwhp and only really bags it in first gear, as soon as second hits it grips and goes like the clappers. He does use the Dunlop DZ02G semi slicks, which probably helps on the track, but he drives on these all day everyday, and even without heating them up, they still don't spin much at all, and corners like no tomorrow.

As i said i'm no professor when it comes to suspension, but my Personal Opinion Is : I think with the right driving style and tyre combination, it will all work out.

Sylvias are MacPherson strut front end and therefore have movement and leverage ratios that lower the effective spring rate at the tyre. The Skyline front end, being double wishbone, doesn't. So you can't compare front spring rates.

Everyone has their own likes and dislikes, how much harshness they can tolerate. And that's a perfectly good thing, freedom of choice. But tell your mate to go and talk to the Dunlop tyre engineer and ask him what spring rate (at the tyre) the DZ02G likes. Ultimately what the tyre likes is the fastest.

;)

Nick, I'm with SK. I find the spring rate too high for street or circuit. It makes the car nervous near the limit and that lowers confidence in the car.

I like the quality of the product, although the piston tube seems a little small, and the ride height seems a little low at it's highest setting, but I'll let Chris and the guys at Centreline sort that when I get the new engine in. I will be softening the springs a fair bit before then too, but if you buy the soft springs and don't like them, you are welcome to trade for mine.

thanks for the responses guys... I was pretty sure the spring rates were going to be too hard but second guessed myself when the guys at Otomoto recommended I try them first... If I go too soft will the valving in the shock be mismatched with the softer spring? Probably a question I should ask them hey...

I have kings springs over the stock shocks at the moment and grip isn't good... when I had Federals the rear would grip okay but since I have changed to Michelins I get axle tramp in 1st gear... I think the current setup is too twitchy and nervous around corners as well, the old stock shocks can't control the stiffer spring anymore...

so yeah even 7kgF and 6kgR is still going to be too hard... maybe I should just get a set of Konis or Bilsteins matched to the Kings and be done with it...the height is pretty spot on as is...

bottom line is I really want to get this dodgy R33 rear ended sorted... the front has always gripped and turned in nicely

I have the 8/6 HR ones in my 180sx. It's not too low, and still gets good traction. Ride comfort is better than I expected. Seems to handle nicely, though I have only street driven it since getting them intsalled, so can't really comment on this aspect at the moment.

thanks for the responses guys... I was pretty sure the spring rates were going to be too hard but second guessed myself when the guys at Otomoto recommended I try them first... If I go too soft will the valving in the shock be mismatched with the softer spring? Probably a question I should ask them hey...

I have kings springs over the stock shocks at the moment and grip isn't good... when I had Federals the rear would grip okay but since I have changed to Michelins I get axle tramp in 1st gear... I think the current setup is too twitchy and nervous around corners as well, the old stock shocks can't control the stiffer spring anymore...

so yeah even 7kgF and 6kgR is still going to be too hard... maybe I should just get a set of Konis or Bilsteins matched to the Kings and be done with it...the height is pretty spot on as is...

bottom line is I really want to get this dodgy R33 rear ended sorted... the front has always gripped and turned in nicely

You have read all the other suspension threads.....and you know all the experienced users (road and track) recommend Bilsteins as the best (in the non maga dollar) shocks. They will work great with your Kings springs. Add a set of Whitleine stabiliser bars and some alignment bushes (caster and camber) and you will have the best handling / ride comfort compromise around.

:)

Thanks SK, yeah I should just do away with the romantic notion of adjustable suspension hey! My mate has a room full of Whiteline gear for his R33 including the Bilsteins and they do look like a great bit of kit and I have already got the swaybars etc on order...

damn but the coilovers were like.... all green and shiny!... lol, such a fashion victim

hi....

i'm also in the market for a set of new suspension.....I have been offered for the following

73157 front springs $149 (designed for bilstein shocks)

70191 rear springs $149 (designed for bilstein shocks)

120340 front bilstein shocks circlip height adjustment $399

120330 rear bilstein shocks circlip height adjustment $429

can some1 plz tell me are they the right ones at a right price for my R32 GTR??? if yes...then i will go head and purchase them from this guy

thanks

Daniel

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


  • Similar Content

  • Latest Posts

    • Even more fun, leave all the ADAS stuff plugged in, but in different locations, hopefully avoid any codes!   And honestly, all these new cars with their weird electronics. Pull all the electronics out Duncan, and just shove an aftermarket ECU and if needed a trans controller in, along with a PDM. Make it run basic but race car styled!
    • To follow up a question from earlier too since I had the front bar off again (fking!) This is what is between the bumper and the drivers side wheel And this is the navigator side, only one thing but its a biggy! So basically....no putting coolers in the wheel arches without a lot of moving other stuff. Assuming I move to properly race prepping this car I'll take that job on and see how the computers respond to removing a whole bunch of ADAS modules
    • So I prepped the car for another track day on Wednesday (will be interesting to see coolant temps post flushing out and the larger reservoir, with a forecast of 3-14 being 20o cooler than last time I took it out). Couple of things to mention; since I am just driving the car and not taking a support vehicle, I took the rear seats out and just loaded the back up Team Trackday style. Look at all that space! To cover off removing the rear seat....it is weird (note the hybrid is probably different because it wouldn't have folding rear seats) Basically, you remove the lower seat base, very similar to a r series but it is a clip that pulls forward to release the base rather than it being bolted down. Easy Then, you need to remove the side section of the rear seat on each side. There is a 14mm head nut at the bottom of the side piece, the it slides upwards off a hook at the top to release; you also need to unhook the seatbelt from the loop at the top. Then the centre piece is weird. You need to release/fold the seats forward with the tab in the boot on each side From there, there are 2,x12mm headed bolts holding the rear of each seat to the folding bracket, under the trim between the rear seat and the boot (4x christmas tree clips there, they suck). The seat is out but you can see where the bolts attach to the bracket
    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
×
×
  • Create New...