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Who's interested in TALLER rollcenter adjusters?

  • G-E
    G-E
    Junior Member
    • 6320

    Who's interested in TALLER rollcenter adjusters?

    I'm having a batch of steel ones made to replenish my stocks, they are 32mm tall, which appear to be the tallest ones in production so far… the others are only in the 25mm range

    What I'm asking is: if I made a ~40mm version, who'd be interested? Or perhaps another size? Anyone want an increase in offset at all?

    I'd make some design changes, some careful removal of material to save weight will be on the books, this would drive up cost very slightly (probably $15-20 per set?), and they'd only be available in steel…
  • slammedcoupe
    slammedcoupe
    Senior Member
    • 721

    #2
    have you thought about building RCA's instead of NCRCA's?

    I would be interested in a set of RCA's pending price
  • reddzx
    reddzx
    Senior Citizen
    • 6440

    #3
    I always wanted to be taller. But what advantage is there to this RCA mod?



    1988 300ZX Turbo, Shiro Special #760
    1988 300ZX Turbo Automatic (wife's car)
    1991 Hard-body 2WD

    http://zccw.org/zccw/?page_id=1215
  • frostvectron
    frostvectron
    Senior Member
    • 1044

    #4
    G-E can probably explain it better than me, but I believe a taller RCA will correct the suspension geometry when you lower the ride height even more.

    Kind of an example: a 1" RCA will correct a certain level of low. If you lower beyond that, the RCA helps but doesn't fully correct your geometry. A taller RCA allows you to fully correct the geometry at lower ride heights.
    Justin
    1986 NA 2-seater
    SCCA Solo E-Street Prepared #31
    Race Videos
    Build Thread
  • G-E
    G-E
    Junior Member
    • 6320

    #5
    Originally posted by slammedcoupe View Post
    have you thought about building RCA's instead of NCRCA's?

    I would be interested in a set of RCA's pending price
    A straight RCA has less benefits that an offset one has, and paired with adjustable control arms/tension rods, you can really dial in your suspension

    The second problem is brake clearance, the straight ones at only 1" tall already have problems with rotors and control arms touching, 1.5" or more will just make it increasingly worse

    Thirdly, others already produce them (albeit short), and I have no interest in competing with their parts directly… I'm looking to add value by accomplishing more
  • G-E
    G-E
    Junior Member
    • 6320

    #6
    Originally posted by reddzx View Post
    I always wanted to be taller. But what advantage is there to this RCA mod?
    The more you lower your car, the more your car wants to roll, and like frostvectron found out, it can be quite dramatic…

    So my 32mm RCA will return the rollcenter height to stock if you've lowered the car just over 1", but since the center of gravity is also lowered with the car, the effect is compounded… then with the added camber, the car becomes a lot more stable around hard corners

    Something taller, like a 38mm version would be a significant improvement for people who go even lower, like the cool kids that roll/pull/tug to slam, but going much above that is probably wasted, the body will become the limiting factor
  • reddzx
    reddzx
    Senior Citizen
    • 6440

    #7
    I'll never be a cool kid again



    1988 300ZX Turbo, Shiro Special #760
    1988 300ZX Turbo Automatic (wife's car)
    1991 Hard-body 2WD

    http://zccw.org/zccw/?page_id=1215