Wilwood Forged Superlite Internal - Manual

4700 Calle Bolero • Camarillo, CA 93012 • www.wilwood.com • Sales: (805) 388-1188 • E-mail Tech Assistance: [email protected]
225 REV DATE: 08-10-12
SUPERLITE FSLI SYMMETRICAL
PISTON BORE CALIPER
Caliper Highlights:
The Superlite caliper series is the benchmark in short track, late
model, modified and open wheel competition. It also enjoys
prominence in a variety of road-race, off-road, rally and sport driving
applications. The new FSLI model series is the latest innovation to
this Superlite family of calipers. It has been redesigned with internal
fluid ports that eliminate the external fluid cross-over tubes. The
transfer tube has been replaced with two additional bleed screw
assemblies which allows this group of symmetrical piston bore models
to be mounted either right or left in a leading or trailing position.
The most noteworthy feature of all of the FSL caliper models is the exceptional strength and
reduced weight of the forging. With assembled weights just at 4.4 pounds, the FSL body design in itself is a product of computer generated
solid modeling and stress analysis technology. Each caliper features closed end bridges with a radial transition down to the main body and
piston bore housings. The elimination of machined steps and sharp shoulders in this critical area provides a measurable increase in overall
body strength and resistance to deflection under load.
Every FSL body is stress-flow forged from a premium grade aluminum alloy billet. Stress-flow forging realigns the metal's internal grain
structure to flow within the contour of the caliper body. This process eliminates the stresses and interruptions to the internal grain structure
that occur when machining a straight block billet.
FSL calipers are assembled with high strength steel main bridge bolts in tension and then supplemented with center bridge bolts to provide
maximum resistance and strength against deflection and body separation under load. The center bridge support also provides positive pad
retention with quick access when it’s time for service. Clamping force, structural deflection, and volume displacement tests have proven the
superior strength and efficiency of the FSLI. Simply stated, there is no better way to build a stronger or more efficient one or two-piece
aluminum caliper body at equal or lower weight.
FSL calipers feature all of Wilwood’s latest refinements and proven performance features including replaceable SRS stainless steel bridge
plates. SRS plates extend caliper life by preventing wear at the bridge abutments otherwise caused by pad edge gouging. Spring tension
in the SRS plates also eliminates pad rattle and helps to dampen the vibration harmonics that can contribute to squeal under braking. Other
standard Wilwood features include high-temperature, square faced o-ring seals for positive sealing, controlled piston retraction, and long
service life in high heat conditions. Machined stainless steel pistons are used to resist corrosion, retard heat transfer, and eliminate backside
deflection under pressure. Two-piece bleed screw assemblies provide long, reliable service life and are easily replaced if necessary.
The FSLI calipers are direct replacements for all previous FSL model calipers, and all other competitive brands with 3.50" centered
mounting lugs. Calipers are available in the popular 1.75", 1.62”, 1.38", 1.25” and 1.12” symmetrical piston configurations for .81", 1.10"
and 1.25" rotor widths. All FSL calipers use type 7420 brake pad with the full range of PolyMatrix and Smart Pad compounds being available
to match brake response, temperature range, and wear rates to any driving style or conditions.
ORDERING INFORMATION:
NOTE: (1) AVAILABLE RED, ADD “RD” TO END OF PART NUMBER WHEN ORDERING
BORE SIZE DISC WIDTH PART NUMBER
1.75” 44,5 mm 1.25” 31,8 mm 120-11136
1.75” 44,5 mm 1.10” 27,9 mm 120-11135
1.75” 44,5 mm .81” 20,6 mm 120-11134
1.75” 44,5 mm .81” 20,6 mm 120-11134-SI
1.62” 41,1 mm 1.25” 31,8 mm 120-11133
1.62” 41,1 mm 1.10 27,9 mm 120-11132
1.62” 41,1 mm .81” 20,6 mm 120-11131
1.38” 35,0 mm 1.25” 31,8 mm 120-11130
1.38” 35,0 mm 1.10” 27,9 mm 120-11129
1.38” 35,0 mm .81” 20,6 mm 120-11128 (1)
1.25” 31,8 mm 1.25” 31,8 mm 120-11127
1.25” 31,8 mm .81” 20,6 mm 120-11126
1.12” 28,4 mm .81” 20,6 mm 120-11125
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