Fast Facts:
- One piece 6061 extruded aluminum body with hard anodized
finish
- Radial Bypass Damping technology
- IFMV – Incremental Flow Metering Valve with 9
settings
- 30% faster heat dissipation
- Up to 100° cooler peak operating temperature
- 10% - 25% lighter than similar welded bypass steel shocks
- 1-1/8” hard chromium plated piston rod
- 3” hard anodized piston with high flow ports
- Massive 4-1/2” x 12” 6061-T6 aluminum reservoir
housing with anti-cavitation valve ( ACV )
Serious off-road competitors now have a
dynamic new shock to consider – the Bilstein Black
Hawk™ 9300 Series racing shock. The Bilstein Black
Hawk™ isn’t just a revision of an existing product, but
is an all new shock packed with technological advances. The only
thing that can rival its revolutionary performance is its radically
innovative design.
Visually Impressive – Extensive
Engineering
Bilstein engineered this shock to outperform
all others on the market, while incorporating a dramatic and
distinctive appearance. Each Black Hawk™ is
manufactured using extruded 6061-T6 aluminum alloy, resulting in an
incredible 25% reduction in weight. The three-inch inside diameter
body is precision bored, then carefully honed to finite tolerances.
This precision bore results in longer piston band life, reduced
frictional resistance, and ultimately, less heat generation.
A
major benefit to this extruded design is the use of integral bypass
features. The Black Hawk™ bypass ports are gun-drilled to
length. Custom tooling is used to drill the port linking the bypass
port and the main body. By allowing the port to be drilled from the
inside, the need for external plugs is not necessary, removing in
the potential for seal failures. The extruded design eliminates the
welding process which can cause distortion to the internal bore.
A significant difference over other shocks is
Bilstein’s Patent Pending Incremental Flow Metering Valve
(IFMV) in the bypass ports. Most shocks use a cone, or bullet
style, check valve piston adjusted by a threaded stop pin. The
amount of flow is governed by the position of the cone check valve
in the bypass tube resulting in an inaccurate bell curve flow rate
between adjustment settings. In contrast, Bilstein’s patented
IFMV piston operates by opening only as far as necessary for the
pressurized oil to freely flow by. This setup allows for a more
linear and specific rate of oil flow resulting in better control
over the function of the bypass tubes.
The adjusters for the bypass
valves were engineered with ease of adjustment in mind. A 3/8-inch
socket or wrench is all that is necessary to adjust them,
simplifying the process versus previous, more cumbersome designs. A
spring-loaded detent ball produces an audible and positive click
through nine positions of adjustability. Adjusters are color coded
for quick identification: blue for compression, red for rebound.
The unique working piston of the Bilstein Black
Hawk™ is also made from 6061-T6 aluminum and hard
anodized. The three inch O.D. piston uses a one inch wide wear band
to increase lateral support and to provide complete coverage of the
bypass ports in the main cylinder. Angular ports are positioned to
support the valving shims throughout the circumference, improving
flow and reducing valving fatigue.
The massive cooling fins of this
shock are another distinctive feature of the Bilstein Black
Hawk™. Offering much better heat transfer than
steel, the aluminum fins are an integral part of making the
extruded shock body one huge heat sink. Air flow over the shock
cools both the body and the fluid inside. Bilstein testing has
demonstrated that this design lowers peak operating temperatures by
as much as 100° F.
The rod-end assemblies are also crafted out
of solid aluminum and are available in a variety of offsets to
accommodate different mounting configurations. Inside the aluminum
rod-end is a ¾-inch ID Teflon-lined spherical bearing.
Optional 1/2 inch or 5/8 inch diameter bearing spacers are
available. The 1-1/8 inch piston rod is precision ground, polished
and then Hard Chromium plated. This surface finish allows oil to
accumulate on the shaft as it cycles to help lubricate the seals.
The end cap of the shock uses the same spherical bearings found at
the bottom of the shock. Bilstein developed proprietary bearing cup
seals to keep dirt and water from entering the bearing assembly,
substantially lengthening service life.
At an impressive 4-1/2
inches in diameter, the remote reservoir is significantly larger
than anything else currently available. It’s inside this
reservoir where Bilstein really stepped up the design, providing a
major advancement in shock absorber technology with the
Anti-Cavitation Valve ( ACV ). This valve reduces the amount of gas
pressure required in the shock by 83%. Working much like the piston
in the shock body by using valve shims to govern oil flow, the
Anti-Cavitation Valve also maintains positive gas pressure in the
shock. Gas pressures are reduced from an average of 250psi to a
minimum of 50psi, virtually eliminating the “gas
spring” effect found in other designs and giving the vehicle
greater damping control and improved driver feel.
With all of its
technological advancements, the Bilstein Black
Hawk™ Radial Bypass Damper gives off-road racers a
revolutionary new choice to equip their vehicles for victory.
SHOCK BODY
• Rapid heat
dissipating, one piece extruded 6061 aluminum construction
featuring Radial Bypass Damping (RBD) technology
•
Approximately 30% faster cooling efficiency than steel and up to
100° lower peak operating temperatures
• Stronger and
10%-25% lighter than similar welded steel bypass shock bodies
without the distortion from welding
INCREMENTAL BYPASS FLOW METERING VALVE
(IFMV)
• Extremely accurate, incremental flow
adjustment within a sealed mechanism for extreme resistance to dirt
contamination
• Easily adjustable color-coded Rebound (red)
and Bump (blue) bypass adjusters with an internal detent feature
providing prominent "clicks" to each of the 9 settings
• High
impact, copolymer check valve piston providing excellent wear
characteristics
SHOCK PISTON & ROD
• 3" O.D. 6061-T6
aluminum, Type III hard anodized piston with high-flow ports and 1" tall low friction bronze backed wear band with O-ring seal
• Industry’s largest Hard-Chromium plated piston rod
currently offered at 1-1/8" O.D.
REMOTE
RESERVOIR
• Massive 4-1/2” x 12” 6061-T6
aluminum reservoir housing
• Anti-cavitation valve ( ACV )
and larger reservoir diameter reduces the required gas pressure
(130%-175%), lowering the piston rod pressure and giving the
vehicle greater damping control