BUILD TIME ESTIMATED AT 1-2 WEEKS CURRENTLY.

 

To complement our other link and arm offerings, we now round out the set with rear adjustable upper control arms (RUCA) for the SC300/400, Gen1 GS300 and MKIV Supra.  We have built these arms to handle drift and track abuses lifetime poly bushing or spherical inner bearing options and high-misalignment outer spherical ball joint to handle the extreme conditions of drift and track use.  The setup is light, easy to adjust without an alignment rack and allows a perfect balanced offset for wheel/tire fitment of camber curve modification.

 

Features:

  • Steel plate gusseted construction for max strength.
  • Bushing/bearing cups are Precision TIG welded  and plate ribs are MIG welded.
  • Setup for mild rear camber offset for traction (road race) or positive camber for more contact patch under squat (drag/drift).  At a 2" drop, 5 degrees of total adjustment range between +2.5 and -2.5 over non-adjustable stock arm.
  • In conjunction with our Adjustable LCA and toe links these arms sweep between +4 and -8 degrees of camber. If going positive camber that we would include a grade 8 jam nut for the best thread support.
  • SuperPro Lifetime Poly bushings for inner mounts or custom Precision FK PTFE Spherical Bearings.
  • Outer ball joint replaced with Precision High-Misalignment PTFE Rod end and monolithic Chromoly taper stud.
  • Outer ball joint set with Belleville washer on the jam nut for addition security.

 

 

 

Adjustment

Our rear arms are symmetric adjusted meaning you adjust both sides by the same amount via the outer rod end thread.  Though it may appear inconvenient, the upper arms should be adjusted as a fixed offset and infinite turnbuckle adjustments can create differences from side to side impacting handling and steering bias. Lower links offer the infinite adjustment for fine tuning and are a better place to manipulate camber and toe changes for a stable geometry.  Alignments are always iterative, meaning as adjustments are made to one link, the other will need small adjustments as well.  By fixing the rear upper to a finite offset in graduations of 1/16" we are simplifying to overall alignment process.

 

Primary adjustment is done with the wheel off as a static offset.  Start with a deterministic number of turns on the upper rod end from fully seated.  This means thread it in completely, then spin it out the same number of turns per side.  The max strength of the rod end will de-rate after 10 turns outward or 0.625" of exposed thread beyond the jam nut.  We strongly suggest keeping the max thread engagement possible to maximize safety. If using these arms for positive camber correction we will include a grade 8 jam nut to provide additional support. Each turn (full rotation of the rod end) will net close to .8 degrees of camber change.

 

Options

We build these with several options for customization and user input. If one of our options does not meet your vehicle goals contact us about custom options. Camber goals are a starting point but given the specialized nature of wheel fitment and body work, we ask for a center point on the  arm length for custom setups and we will also provide a length offset number for our standard configurations.  We have complete suspension maps and can offer setup advise on adjustment and general ranges for fitment.

 

SuperPro Poly Inner Mounts: The best for long life and low maintenance.  Lifetime poly features grooves to hold grease and a break-through material that is unlike any other Polyurethane on the market.  Guaranteed to not egg out, deform or migrate, this is the best Polyurethane we could find and we have looked all over the world. An added benefit of our design is that we use factory bushing dimensions.  This allows us to reuse SuperPro bushings that were previously purchased and perhaps installed in the factory UCA.  At this time we have only confirmed OE SuperPro bushings and we do not suggest another brand due to fitment tolerance and potential failure due to improper fit.

 

Spherical Bearing Mounts:  The most precise, free-moving motion transfer connection, these bearings are a must for higher loads and stresses from aggressive wheel fitments. The bearings can product low speed squeaking related to the tight interface and PTFE fabric but PTFE dry lube worked into the interface should resolve the noise.

 

Safety and Maintenance

Like all of our products, these are arm provided for customers to use AT YOUR OWN RISK.  Proper setup, alignment and installation should be done with reasonable and prudent judgement and any concern should be raised immediately.  Arms should always be inspected within 100 miles of original install and inspection of jam nuts and mounting bolts should be verified to be fastened securely.  Rod ends should be centered on their mount to minimize bias and maximize misalignment. Rod ends should only be lubricated with PTFE dry lube and never grease.  Rubber boots are available however frequent internal lubrication is required again with a PTFE dry lube.

 

REAR UPPER CONTROL ARM VIP AND CORRECTING MKIV SUPRA SC 300/400 GS300

  • $985.00
  • $849.95


Available Options


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Tags: SC300, SC400, rear, Uca, camber, correction, inner, tire, wear, lowering, SC, SOARER, SUPRA, MKIV, GS, ARISTO, 1992.1993.1994.1995, 1996, 1997, 1998, 1999, 2000, 94.5, 94, 95, 96, 97, 98, 99, 00, vip, ruca, OE, replacement, adjustable, ruca, track, drift