HD SYSTEMS HS TYPE COILOVER question

[boosted32]

I noticed UAS have some 'budget' coil-overs for sale now which I am considering buying (for R32 GTST):

HD SYSTEMS HS TYPE COILOVER SUSPENSION FOR SKYLINE GTS-T $1199

http://www.uniquemotorsports.com.au/pricel...esuspension.htm

(half-way down the page - green coloured)

These seem to be a good price for what you get... what do people think of these?? My car is basically a daily driver so i don't need anything fancy... I know they are a similar price to bilsteins/kings, but the coilovers have the advantage of being adjustable (height/damper).

Apparently they come with something like 500/400 pound springs which is too hard for everyday road use. Reading other post it seems like 300/190 pounds would be acceptible for Adelaide roads...??

Any comments/recommendations appreciated...

[Anquetil]

Was thinking of getting these as well.

Would like to here any feedback?...

[R33Steve]

Was thinking of getting these as well.

Would like to here any feedback?...

Ditto

[boosted32]

these guys are selling them as well... a bit more info on their site:

http://www.newstylemotorsport.com/hdsystem/index.php

[hippy]

wow ... seems to be lots of companies bringing out budget coilovers ... wish there could be more info about these things ...

[Boosted Zed]

I have sold my Tein HR in my zed speed boat. I will know for sure re track times and feel often car after fitting them. I can say that the spring rates are MUCH more sensible than most other Jap coil overs other than Tein Flex but well over twice the price. Both for road and track and you can have TOO hard a spring rate and car will lock up brakes too easy and skip and bounce car all over the road and track and can even be worse than stock suspension.

The other big benfit is you can adjust the overall height not just the spring platform height.

[boosted32]

John, when you say you can adjust the overall height... is that what the extra ring near the bottom of the shaft is for? I noticed the HR have this but not the HS.

Also, R32GTST is 440/330 (8/6) which still seems too hard for the road... you'd probably want to swap the 330s to the front and get 200s for the rear (going by the recommendations in various other threads)

[Nismo32R]

i saw the ad of this HD SYSTEMS HS TYPE COILOVER.....they do look good and cheap, but not sure if they are good for both road and track....so any1 have them on the car?? are they good or not???

[GTR32]

Guys;

be careful spending your money. the only way you'll know the baseline performance of any shock/spring is to put it on a shock dyno and run the thing up to check high/low damping speed (that's shock speed not car speed) to see how it performs so you can compare it to others and in particular see if it has any nasty habits. Feel means diddly unless you are setting up suspensions for a living and even then it's not straightforward.

Cheers

[Boosted Zed]

Yes boosted32 you can adjust the over height and hence the extra locking ring. This stops squashing the spring if you want your car to sit a bit higher than the normal very low.

Re the shock dyno I plan on doing this and I have had the Tein dyno tested to compare with and they were nothing flash. The spring rates are not too hard. Most of the other Jap brands are way harder than this which are too hard but those rates soudn about right for performance road come track.

My Tein are 670 front and were 570 rear which was way too hard. Yes I know it is a heavy boat compared to a R32 but not that much prob 250 or 300kg heavier. But if you want you can ask for what ever spring rate you want within reason which is also a added feature.

[Dahtone Racing]

how low can these things go????

[ed]

Can these be serviced later on in their life?

[GeeTR]

Hey,

Yah, I’ve emailed them and they're getting back with standard spring rates, plus if they are serviceable or not.

The $1700 deal on the HR's is until the end of Jan, so hopefully ma GTR gets off Brisbane docks in time.

My only prolly, is I wanna invest in shocks, not to have to worry about em for a while, meaning they need to be of quality / serviceable / easily changeable spring, have the pillow ball rubber mounted etc, and I’m not sure if these are them. I mean HKS or others are a little bit more pricey, I juz gota figure out if these are worth the risk, given there’s NO information on the web about em.

- M

[GTRgeoff]

I have a set of HR's on the way from UAS so I'll let you all know how they rate. Gotta say John was helpful, but unfortunately the HS are out of stock so I've gone for the more trackworthy package.

[Roy]

...Oh sh1t, so now not only do i have to worry about those GTRs at track days, now you have suspension i have to worry about pesky R33 GTSTs as well? As long as you dont run stickies i may still have your measure:)

Actually, i still have that 2nd set of stickies...its safer if we hunt in packs:)

Cant wait to see how the bus goes now:thumbsup:

[Boosted Zed]

You show em Roy.

By the way their is another option for R32 GTR being a top shelf model HR model with remote cannister so has bump and rebound adjustment and all alloy so light weight. Price is $2395 a set. This is VERY cheap for this style of suspension. Proflex top shelf stuff like this is more like $6k and more. Not saying same quality but may not be much in it. I checked and they don't make for any other cars yet including for my zed slot car. I think R32 GTR and 300ZX ssuspension is same or very similar so might be able to use them. I am checking on this. They require 10 sets ordered and they will make for other cars.

[Scooby]

You show em Roy.

By the way their is another option for R32 GTR being a top shelf model  HR model with remote cannister so has bump and rebound adjustment and all alloy so light weight.  Price is $2395 a set.  This is VERY cheap for this style of suspension.   Proflex top shelf stuff like this is more like $6k and more. Not saying same quality but may not be much in it.  I checked and they don't make for any other cars yet  including for my zed slot car.  I think R32 GTR and 300ZX ssuspension is same or very similar so might be able to use them. I am checking on this. They require 10 sets ordered and they will make for other cars.

Really keen to see some shock dyno comparisons John so we can assess the quality for ourselves. Say against Bilsteins, Konis, Tein and Whiteline? Like you I've seen Tein and they were awful but to be fair I don't know what type/condition.

I reckon you wouldn't be able to keep up with demand if they did well at least under road conditions, given the price.

Cheers

[GTRgeoff]

That's a damn fine price, and an option for a future upgrade if I get too over the top.

As for the car, gonna put the RB25 cams back in today so I can drive it. Too doughy with the GTR cams and no hand controller to compensate, but I will regrind the GTR cams for an amazing $300/pr at Crow to suit the Hydraulic lifters. Nissan wanted about $130 ea for solids and shims which x 24 = lots'o'money.

All things considered, if JP wants to run these in the slotcar then they have to be worth a try. I can't afford to wait otherwise I'd get my mate at the Koni distributor to run them up, but I intend to roll past Pedders and show them as their product is about $3K non-adjustable damping with a stated 400kg/mm springs -> wankers. They need to adjust pricing and maybe determine the spring rate.

I did look at some JIC recently but every piston was rusted and flaking off the chrome and non rebuildable. They are cartridges so you replace the unit. Can be had for $830ish US for a set so the asking price was steep as they are only height adjustable and the cartridges are about 180US each. Very light but these HD's seem to be the best value for money about.

[JH32]

any updates on the quality of these ?

and as 2 G U UP said, how low can they go ?

[GTRgeoff]

Quality is great, you can go very low and the highest setting is just a bit higher than legal.

The spring rate is pretty hard ut about right for track. Nowhere near as hard as the HKS crap in my GTR so that will be replaced soonish.

JP is there any new word on the HR model for GTR33 yet? I'll probably get slightly softer springs than standard this time if the ones I got before are anything to go by.