Page 8 of 8 FirstFirst 1 2 3 4 5 6 7 8
Results 71 to 74 of 74

Thread: HSD coilovers for ae86

  1. #71
    Veteran Vance's Avatar
    Join Date
    Dec 2008
    Name
    Dan/Rio
    State
    NSW
    Location
    Randwick
    Country
    Australia
    Posts
    5,155

    Default

    explain relative.

    if its the same rate as your spring it will essentially just make your spring longer.

    if its softer than the spring it will compress first with the shock and then the spring will compress.

    this will give the shock the amount of stroke it needs.

    essentially it will give an effect like a progressive rate spring.


    i feel we need to open a new topic of progressive spring rates vs fixed spring rates vs fixed spring rates + helper springs

  2. #72
    Senior Member kaibeecee's Avatar
    Join Date
    Dec 2008
    Name
    Pete
    State
    QLD
    Location
    Brisbane
    Country
    Australia
    Posts
    781

    Default

    relativity - as in fluctuation of main spring rates, the helper reflects it.

    ie.

    harder spring rate - harder helper.

    for circuit racing, the tender spring pound rating should be about 20% of the main spring weight.

  3. #73
    Veteran Kid Karola's Avatar
    Join Date
    Jan 2009
    Name
    Karl
    State
    S.A.
    Location
    Adelaide
    Country
    Austria
    Posts
    2,033

    Default

    Bit late, but if the spring rate K of Helper is 20% of 8kg/mm spring = 1.6kg/mm that's still 90lbs seems high (like OEM spring rate in 86). Or did you mean if the Main spring weighs 5kg the Helper should be 1kg?

    Helpers are rectangular cross section wire too (while main spring is larger Ø round wire) as you want the coils on the helper spring to bind completely under the vehicles own weight (so it doesn't doesn't effect damping) and if the suspension is fully unloaded, they should extend to keep the spring captive (so enough K to counter the unsprung mass of the suspension).

    Maybe you're thinking of a progressive spring rate? They show a similar effect as the coils bind (less active coils increase rate) the spring rate can go up by around 20%?

    It was mentioned by both HSD/Stance were released after 2 years R&D. Interestingly the Greddy and DG-5 (Kei-Office before Ogura Racing Clutch took over) were released in 2007... so it took 2 years to reverse engineer them! lol scepticism aside, I'm still waiting to get an answer about the damping of the HSD units (compression/rebound figures) but after 2 years of R&D you'd think this is data that would be on hand. Afterall the dampers are more critical then the spring rates.

    For those wanting installation pics there is a thorough thread here on also worth noting that they were originally twice as much as the Greddy ($3000 -$1500)
    Last edited by Kid Karola; 29th January 2010 at 03:19 PM.
    RokuSteady : Shakotan - Tsuraichi - Hippari - Onikyan : 神奈川 様式

  4. #74
    Veteran Kid Karola's Avatar
    Join Date
    Jan 2009
    Name
    Karl
    State
    S.A.
    Location
    Adelaide
    Country
    Austria
    Posts
    2,033

    Default

    6K Front and 4.5/4.7K rear is firm but not bone jarring uncomfortable in a street car. Strut braces will help reduce flex. +8/6K is more suitable to track and drift applications where roads are rutted with potholes.

    Also I agree with Slyder in
    RokuSteady : Shakotan - Tsuraichi - Hippari - Onikyan : 神奈川 様式

Page 8 of 8 FirstFirst 1 2 3 4 5 6 7 8

Similar Threads

  1. HSD Coilovers for sale.. again
    By mcBen in forum Car Parts For Sale
    Replies: 5
    Last Post: 16th October 2012, 05:08 PM
  2. Replies: 1
    Last Post: 7th May 2012, 12:56 AM
  3. HSD Rear coilovers for sale (SA)
    By Corolla86 in forum Car Parts For Sale
    Replies: 14
    Last Post: 1st August 2011, 09:12 PM
  4. HSD or BC Racing coilovers for ae86
    By trueno_coupe in forum General Topics (No Technical Questions)
    Replies: 20
    Last Post: 9th November 2010, 06:53 PM
  5. S13 HSD HR coilovers
    By Rallystanza in forum Car Parts For Sale
    Replies: 16
    Last Post: 14th March 2007, 09:32 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •