Ultra Series Aluminum Flywheels
Unorthodox's Ultra Series Flywheels have some key advantages over stock and other aftermarket
units. Machining tolerances are extremely important when making a flywheel. Eccentricity,
parallelism, and the step height (which is critical to proper clutch break-in and engagement)
are kept to within .0015'', the most accurate in the industry! Dowel pins are hardened steel
units and all hardware is grade-8 (grade 10.9 metric equivalent), the highest grade of fastener
available today. Torque plates are also included in applications where required and flywheels
are checked for zero-balance before shipping.
Ferritic Nitrocarburized Inserts
The inserts are made from high grade steel, but they utilize a unique ferritic nitrocarburizing
process that hardens the steel to protect it against aggressive ceramic clutches. The result?
A surface more durable than a cast iron OEM or chrome-moly flywheel! It also will not rust and
is resistant to metallic friction materials seizing against the flywheel. This method has proven
to work better than just using harder steel because it keeps the coefficient of friction high,
which is what all clutches like! Harder steels (such as 1050) have a much lower coefficient of
friction. Also all inserts are CNC-machined, not ground like most aftermarket units.
Stepped Dowel-Pins
These flywheels now include stepped dowel-pins. The advantage of stepped dowel-pins is that if a
pin were loosened during installation, there is no possibility of that pin coming out of the
flywheel. It will be retained by the clutch cover.
Serviceable
Another benefit to these flywheels is the fact that they can be serviced, which is not the case
with forged chrome-moly steel flywheels. All inserts, also know as heat shields, are standardized
sizes and are user replaceable. None of these inserts are riveted.
Ring Gears
All ring gears are heated before they are placed on the flywheel and then cooled to shrink them
in place. In addition they are bolted to ensure the ring gear will never slip or come off the
flywheel under any circumstance, including dramatic changes in temperature.
Weight
The weights of these flywheels are chosen very carefully. They are the perfect balance of
strength and light-weight. Because of their weight, energy normally used to turn the stock
steel flywheel is now used to turn your drive wheels! In addition, the reduced mass allows
the engine to rev faster and get you into your power-band more quickly.
Acceleration On Demand
Aluminum flywheels are the perfect choice for street use, drag racing, autocross, and road racing
events. An aluminum flywheel can provide the equivalent of adding 10 to 30 horsepower to your
vehicle at the drive wheels!
Features:
Lightweight 6061-T6 billet aluminum
CNC machined to .0015''
Real HP and Torque gains
Wear-resistant, replaceable treated alloy steel friction inserts
Stepped Dowel-Pins
Torque plates included in applications where required
Works with both stock and aftermarket clutches
High quality polished finish
