Rear Suspension; Control Arms - Factory Five Racing Mk3 Roadster Assembly Manual

Rear Suspension

The standard solid axle rear suspension works well, is low maintenance and is reliable. The next step in
performance is the 3-Link upgrade for the solid axle. This is for the more serious driver that goes to more
track events and wants to start exploring the limit without giving up the "off the line" bite of a solid axle.
The ultimate rear suspension is the FFR independent rear suspension package. Both driver comfort and
handling are significantly improved especially on rough surfaces.

Control Arms

Stock: Stamped steel with rubber bushings.
Front: The stock front arms work well all round. The tubular front lower control arms with polyurethane
bushings are lighter, eliminate the rubber and look better than the stock Mustang arms.
Rear: Using tubular control arms with polyurethane bushings helps to locate the solid axle and hook up
better on the drag launches.
Shocks/Springs
Using the Mustang rear coil springs and shocks gives a comfortable ride. For a slightly stiffer suspension,
replace the stock rear shocks with aftermarket units. We have found that KYB makes an inexpensive
good replacement that roughly 20% stiffer than stock.
For the pro road racer, rear coil-over shocks gives you the ease to change spring rates, ride height (i.e.
drag racing vs. road racing), and shock valving.
Factory Five offers a few different shock/spring packages.
• An affordable rear coil-over package which includes shocks and 350 lb/in springs.
• A road racing oriented 3-Link and front coil-over package, which includes stiffer valved shocks and
600 lb/in front springs and 400 lb/in rear springs.
High Performance Manual Braking Systems
The braking systems recommended below are designed for those searching for higher performance
braking capabilities. These are systems that have been used successfully by our customers and us. Each
component below has been selected to optimize the capabilities of the system. If an attempt is made to
utilize some of the specified components, but not all of them in combination, then braking abilities may
not be satisfactory.
ATTENTION:
• For all manual braking setups use the brake pedal from a 1984 4-cylinder Mustang (Ford Part
#08BZ2455A), this pedal can also be made by modifying the V8 Mustang pedal as specified in the
FFR Manual (this modification should be done by a professional shop).
• Some of the setups may not clear some wheel sizes and designs.
• For all rear disc brake setups, use a proportioning valve on the rear brakes.
FFR competition bump steer kit
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