HD SYSTEMS HS TYPE COILOVER question

[Dahtone Racing]

got em in ym car now and they go ***ing low

i cant even get to the lowest lol

[JH32]

cool !

they sound the goods then, cheers guys

Also which model did you guys get .... HS or HR ?

[GTRgeoff]

HR's

[MsG_ChRiS]

check out d2 coil-overs from just jap they seem to be a good buy also really good build quality and sexy purple colour mmmm.... (you can get them in street,race or drift apps.)

be careful i have heard the spring rates in the HD systems coil-overs are way to high for street use

[banazis]

I know this is a skyline forum but i've seen that a few guys with toyota sedans come on here as well so i thought my question might not be totally pointless.

I have a JZX90 tourer V and am trying to sort out some suspension for it which is not that easy. However, i noticed that HD system make coilovers for my car. I've read a couple of threads on these forums about these coilovers and the general consensus is that the spring rates are too hard (referring to the skyline units). For an r33 they are 8kg/mm front and 7kg/mm rear.

Well for the jzx90 they are 12kg/mm front and 7gh/mm rear! I thought that the two cars were similar in weight and (probably) F/R weight distribution. Why the big difference?

So i suppose the main question i have is: what would be a good spring rate combination for my car?

Also, i've seen bilstein shocks thrown up there as a good all round option. Who should i contact to see if they're able to provide shocks for my car?

Lastly, for the Tourer V guys (if you read this): are there any other options in terms of suspension for our cars?

[fatz]

ive had them in my car for a few months and nothing but good comments

much more compliant than other jap brands

highly recomend

pete

[Sydneykid]

I know this is a skyline forum but i've seen that a few guys with toyota sedans come on here as well so i thought my question might not be totally pointless.

I have a JZX90 tourer V and am trying to sort out some suspension for it which is not that easy. However, i noticed that HD system make coilovers for my car. I've read a couple of threads on these forums about these coilovers and the general consensus is that the spring rates are too hard (referring to the skyline units). For an r33 they are 8kg/mm front and 7kg/mm rear.

Well for  the jzx90 they are 12kg/mm front and 7gh/mm rear! I thought that the two cars were similar in weight and (probably) F/R weight distribution. Why the big difference?

So i suppose the main question i have is: what would be a good spring rate combination for my car?

Also, i've seen bilstein shocks thrown up there as a good all round option. Who should i contact to see if they're able to provide shocks for my car?

Lastly, for the Tourer V guys (if you read this): are there any other options in terms of suspension for our cars?

The suspension movement and leverage ratios between the cars are totally different. You can not compare the spring rates between a car with a 1.25 to 1 movement and leverage ratios to a car with 1 to 1 ratios. If I stick a 12kg/mm spring in a car with a 1.25 to 1 leverage and movment ratios, the "effective" spring rate is 7.7kg/mm. The "effective spring rate" is what the tyre sees, and that's what matters when we are talking about traction/grip.

Hope that helps:cheers:

[banazis]

The suspension movement and leverage ratios between the cars are totally different. You can not compare the spring rates between a car with a 1.25 to 1 movement and leverage ratios to a car with 1 to 1 ratios. If I stick a 12kg/mm spring in a car with a 1.25 to 1 leverage and movment ratios, the "effective" spring rate is 7.7kg/mm. The "effective spring rate" is what the tyre sees, and that's what matters when we are talking about traction/grip.

Ah, okay, thanks for that

Still looking for a good spring rate combo for a JZX90 if anyone knows about that type of stuff

[lukits01]

Is there a difference in build material between the HR and the HS?

Are they all made from alluminium?

[danh]

mind if i ask how would these HSD coilovers compare to

1. D2

2. TEIN SuperStreet

3. TEIN Flex

4. HKS Hipermax II

5. HKS Hipermax performa

6. HKS Hipermax pro pfr

what would be the best choice between these if...

the HSD are about $1800? correct?

and D2 are about the same price.

HKS Hipermax II and

TEIN super street with EDFC are about $2k

but TEIN flex and HKS pro are at least another $1k on top of that.

thank you

dan

[Josh]

High Performance Imports Magazine uses them in their R32 4dr and they had the D1 driver Izimuda driving their car and he said it felt very good apart from HICAS, which has nothing to do with the coilovers, so i'd say they are pretty good..

[Mid_Nite_R33]

I am looking for a street coilover set up, What are the spring rates on the HS's and the HR's ?

[Sydneykid]

High Performance Imports Magazine uses them in their R32 4dr and they had the D1 driver Izimuda driving their car and he said it felt very good apart from HICAS, which has nothing to do with the coilovers, so i'd say they are pretty good..

<{POST_SNAPBACK}>

Oh give me a break, Ottomoto are the distributors, what do you think they are going to print?

cheers

[danh]

Oh give me a break, Ottomoto are the distributors, what do you think they are going to print?

cheers 

<{POST_SNAPBACK}>

sk,

is HSD made by otomoto?

[Sydneykid]

sk,

is HSD made by otomoto?

<{POST_SNAPBACK}>

Otomoto are the distributors of HSD.

They are also the distributors of OS Giken.

And the distibutors for the HPI Videos.

Pardon me for being cynical. <_<

cheers

[Roy]

Oh give me a break, Ottomoto are the distributors, what do you think they are going to print?

cheers 

<{POST_SNAPBACK}>

LOL...i had a post saying the same thing all ready, but decided agaisnt it as it doesnt necessarily mean they arent good.

Also rememebr where they got the clutch etc form

[Josh]

True, the are distributed by them, BUT as far as I know izimuda isnt sponsored by either, so his input would be impartial... unless they asked him to say that.. hahaha. But seriously I reckon they seem alright, was thinking about getting some.

Heard anything about them sk?

[Roy]

Arent we referring to what has been written in an article....i doubt the quoted source is ever going to read the article, or care for that matter what is said in the article, the author of article, the one quoting a conversation can put a slant on matters though.

Anyway, i actually like how GTR-Geoffs R33 GTS25T drove with them, as a passenger the car felt pretty nice, what that means in the real world...lol who knows, but i almost bought some...but then again go far enough back i think i have almost bought every shock known to man, and almost got laid once too.

Since noone has done 40,000kms on them yet, suppose we just have to suck it and see...but they are pretty well priced

[GTRgeoff]

standard springs too hard but the improvement in handling had to be good for 3-5 seconds at the island

[Josh]

They are pretty well priced aren't they...

That's what I mean about the article he MAY have said that or something slightly different.. seeing as though the magazine is run by the same people who run otomoto.

I'm seriously thinking about getting some and setting up for drift...

What do you have in your car at the moment Roy?