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I want a set of RCA's (Roll Center Adjusters)

  • I have money now!

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  • I don't have any money (which means you won't get them)

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Discussion Starter · #1 ·
Designed by DonL.

Mfg by me. T6061-T6 Anodized.

See Brakes and suspension for reasons.

$60/set + shipping.

If we reach 25 sets, $50/set + shipping.

New longer bolts is your job...

Payment Status:

Carlos Relova
Christian Ellingson
Justin Marlow
Loc Nguyen
Joe Bartek
Dale Klanchnik
Shaun Camantigue
Robert Bowles
Chad Zemer
Josh Rapier
Nicholas Reiser
Aaron Ingles
Sten Thornburg (3) <- the 15 mark!
Michael Dionne
 

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Discussion Starter · #16 ·
Ha ha. JK Logo stickers.

Mr. Malloy always says JK Motorsports.

Much thanks goes to you guys who make it possible.
I couldn't really front the $ to have an in-stock product.

Well, we're at 10, 5 more to go and this could be for real!

I have to get them anodized in lots, which may be clear
or boring black. If you want to have them anodized yourself,
that's possible, though I suspect the lot charge would be high.
 

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Discussion Starter · #19 ·
82Spearco said:
jdk_ii said:
I have to get them anodized in lots, which may be clear
or boring black. If you want to have them anodized yourself,
that's possible, though I suspect the lot charge would be high.
These won't be visible with aftermarket wheels and the JK BBK, will they? If so, we should anodize them the same color as the Wilwood caliper???
They won't be visible, unless you look from underneath the car.
 

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Discussion Starter · #30 ·
Group Buy is ** ON! **

After the NJ meet, we are clearly at the 15 level.

Payment is $60 + $5 shipping.

If PayPal, you have to add 3.2% ($67.00 total)

Deadline: 30 June 2003

Price after deadline is $80.00/set

PayPal to: jdk @ speakeasy.org
(remove spaces...)
 

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Discussion Starter · #47 ·
The idea behind a RCA is to restore the angle of the lower suspension arm.

Since it has a fixed pivot point (on the frame), lowering springs
create an angle "UP" towards the outboard pivot (the ball joint
in this case).

You've installed a set of lower springs. Say Eibachs. They drop
the the suspension 1". Your car now sits lower.

Since the inboard pivot point of the lower control arm doesn't change,
its outboard point in space moves up 1".



Insert a spacer to lower this pivot point, this restores the lower
control arm to it's original angle.

Note that this outboard pivot point is the ball joint, combined with
the steering arm.

So, with a RCA, it's all back to stock.
 

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Discussion Starter · #51 ·
Stefan said:
Isn't the amount of droop of the control arm when the car is on a hoist determined by the length of the extended strut insert? Kind of hangs off it?So regardless of what the balljoint is doing, the control arm+wheel etc is going to want to hang down MORE than stock... the length of the fully extended damper+30mm instead of just the length of the fully extended damper.
There are several possible "stops" in the front suspension
when on a lift.

The actually shock travel, the front strut rods, the steering rack pivots,
the ball joints and some from the front sway bar.

Which one "stops" first, I don't know, but given it's hanging weight,
the only concern I would have would be putting a few hundred extra
pounds on the hanging suspension.

At that point, one will also experience unitized body flex.
 
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