240Z Street Suspension Setups | Page 3 | The Z Club of Great Britain
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240Z Street Suspension Setups

Discussion in 'S30 (240Z,260Z,280Z) Suspension,Brakes and Steerin' started by Woody928, Aug 29, 2016.

  1. Mick Cliff

    Mick Cliff
    Z Club Member

    Many a true word spoken in jest!
     
  2. richiep

    richiep
    Z Club Member

    There’s a few other options missing from this discussion. I know you were trying to trim things down Woody to a shortlist but for completeness, it’s worth mentioning.

    Techno Toy Tuning - their units are complete, ie no welding etc. They also now offer an evolved front kit that is entirely new, I.e. doesn’t use Nissan strut cores. If you want a testimony on their quality, ask Skiddell and pmac- Steve’s car is running on them in the Time Attack series, and they are very happy with them. Not out of the question cost-wise either given those insanely priced Intrax ones are being discussed. T3 can be run with a weld-in camber plate, a bolt-on one, or a solid top that can be turned to allow 1.5 deg camber adjustment in each direction without having to cut the strut tower tops.

    CX Racing do a version of the BC ones - I’m guessing same factory, different colour coding! Could be had for less than the BC ones if you have someone in the US to take delivery and work a way around USPS’s terrible shipping rates.

    Megan Racing - it’s been an option for a while in the US to use the S14 Megan coilovers modded to work on Zs. However, Megan now make a Z-specific kit. It’s similar style to the BC one, but has a weld-in camber plate at the strut top.
     
  3. Albrecht

    Albrecht Well-Known Forum User

    In case I'm not getting my point across well enough; my suspicion with the BC 'kits' supplied for the S30-series Z is that they are actually adapting (or indeed adopting) an off-the-shelf damper unit which was originally devised for a much later model with a completely different suspension system. The implications are that they are an adaptation of something originally supplied for S13/S14/S15 Silvias, which have semi-trailing arm rear suspension and therefore vastly different pickup points and motion ratios than the S30's 'Chapman strut'/McPherson rear suspension. They certainly have hugely different spring rates, so how can they have the same damping ranges?

    If manufacturer/suppliers do a lot of research and testing and want to keep their intellectual property their own then that's probably their right, but I have a feeling the people selling-on the BC kits simply don't know...
     
  4. Albrecht

    Albrecht Well-Known Forum User

    I don't agree that the Intrax prices are "insane". They may well be a significant jump up from the average via-USA setups (many of which use generic damper units manufactured in China) but they are a European mainland-based company with a good reputation in motorsport who have worked with marque specialists to properly R&D their products. All things considered, their prices are probably quite realistic.

    Not much point in going into it here, but some of the Japanese aftermarket specialists can supply ready-made bolt-on suspension kits for the S30 which could make your eyes water. Aragosta in particular have 'reassuringly expensive' price tags that would cost a packet to buy and ship, and then you have the doubtful pleasure of being hit with taxes and import duties on top. And they want you to supply cores too!
     
  5. franky

    franky
    Z Club Member

    I think the new ttt ‘evolved’ setups cost more than an intrax rsa once shipped etc. The most important part, the dampers are still off the shelf units. It’s about £2500 for an rsa setup, that’s massive upside down dampers, spring rates designed to suit, supplied welded, with lots of dedicated road,race and track development behind them.

    I popped to exe-tc who possibly make some of the best dampers going, they wanted £6k for the same thing, they said go for the intrax as they’re good quality and they’d happily service them(if pushing in and out of my garage causes a leak :)

    Also they’re not bright red/gold etc.
     
  6. Albrecht

    Albrecht Well-Known Forum User

    Possibly worth adding here:

    The classic BILSTEIN inverted monoshock design can be adapted to the S30's suspension legs by utilising Bilstein's weld-on tubes. The historic rally world has been using these for decades and parts are in ready supply. You could put a 'kit' together for yourself.

    Here's a setup I've used on a couple of my cars, and is currently sitting in a quiet corner of the loft waiting for another job (I'm working on it...):

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]

    Note the insert, readily available from Bilstein, which comes in a few different lengths and can be ordered with your own choice of valving if required:

    [​IMG]

    *Bump/rebound non-adjustable!
     
  7. johnymd

    johnymd
    Z Club Member

    I think in the majority of cases (not all and certainly not track) people mainly want to be able set the ride height and having a car that handles a lot better is not of primary importance. This is why I think low end kits like BC's, which can be bought for under £800 including vat and delivery, suit a lot of people (but not all).
     
  8. Albrecht

    Albrecht Well-Known Forum User

    In which case it's probably worth mentioning some of the simplest options, which are inserts and springs. Kameari Engine Works in Japan for example offer two options for the S30-series Z range (catering for early and late cars, as well as 2/2, 2+2 models) called 'GS Hard' and 'Street'. I believe the damper units are built to Kameari's specs by KYB?

    http://kameariengineworks.co.jp/Catalogue-v3/catalogue-078-2016-05.pdf

    http://kameariengineworks.co.jp/Catalogue-v3/catalogue-077.pdf
     
  9. franky

    franky
    Z Club Member

    Thats the paradox though isn't it. Its harder to have a setup that works well for road and spirited road driving than it is to have a dedicated track setup. You need a much wider operating window.
     
  10. johnymd

    johnymd
    Z Club Member

    When I say set the ride height I should of said "set the ride height to exactly where you prefer it". So adjustable platforms are the easiest way of achieving this. This will then create a problem as if you lower the car more than say 2" you will ideally need to shorten the strut and damper. You then start to get near the cost of a set of cheap BC's.
     
  11. johnymd

    johnymd
    Z Club Member

    I like the idea of the Bilstein's.
     
  12. Rob Gaskin

    Rob Gaskin Treasurer in training Staff Member Committee Member

    Alan is there a load bearing at the top of the front struts for the spring to swivel during steering or is that just the spherical bearing?
     
  13. Albrecht

    Albrecht Well-Known Forum User

    There's a spherical bearing inside the top mount which takes the place of the OEM bearing on the front ones, and the required 'swivel' on both ends (if that makes sense).

    It's a Tim Riley-engineered setup, so well thought through.
     
  14. Woody928

    Woody928
    Z Club Member

    It was more that I was trying to keep my searches to the more local area knowing the cost of shipping as customs from the US. That said really good info, thanks for sharing! :thumbs: A lot of the info on here would make a great sticky thread.

    Quite possibly, as you say though with BC's apparent communication we will never know. Given the entry level cost it would seem highly likely that they have adapted rather than gone for a ground up design specifically for the Z. I'll bow to your knowledge as this is where it starts going over my head in terms of my knowledge.

    As long as the end result is what I'm hoping for then I'm happy. Thanks for the info on Bilstein as well, sounds another interesting option. Are you able to advise what sort of price point that comes in at for comparison?
     
  15. Rob Gaskin

    Rob Gaskin Treasurer in training Staff Member Committee Member

    Ok, I understand but I don't think spherical bearings are meant to take the load/weight.
     
  16. Jan - the Dane

    Jan - the Dane
    Z Club Member

    Hi guys,

    read through all the posts on this subject and again, great to see the expertise, ideas and comments....

    But my suspension needs are a little more simple and I hope to have some input from you all on this. I simply want to drop her a bit for aesthetic reasons...yes, I am that shallow!! Nothing stupid just 20-25mm while still having a decent ride.

    Got a fresh set of KYB shocks, running 8x15 with 195/55. I was thinking of going EIBACH progressive as I do not really see the need for a simple drop(yes, I am also cheap!).

    Clearance should not be a problem(i think) but I am concerned about ride quality and if I will scrape the floor off on UK roads.

    Anyone with a similar set-up or experience?

    Much appreciated!
    Cheers
    Jan
     
  17. Jan - the Dane

    Jan - the Dane
    Z Club Member

    sorry...wanted to say above, I am too cheap for coil-overs!!
     
  18. Paul_S

    Paul_S
    Z Club Member

    Well, I haven't heard back from them (I forgot I asked) so I will send another email.

    I needed an adjuster tool and got a generic one off eBay:

    [​IMG]

    If fits nicely, and I put some handlebar tape on the handle as the edges are a little sharp:

    [​IMG]
     

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