Pulley Set & Belts
Underdrive
90% Lighter Than Stock
Includes Crank, Alternator Pulley & Belt
Unorthodox Racing Pulley Sets are available in a number of
configurations.
Standard Belt Layout (Underdrive)
Our pulley sets provide most of the power gains through weight
loss (80-85%). The remaining part of the gains from these pulleys
comes from underdriving of all the accessories (15-20%).
However, we do not push underdriving for two main reasons.
First, it is important to keep charging systems, air conditioning,
power steering, and water pumps moving fast enough for every day
driving. Second, not much horsepower is gained from extreme
underdriving.
In most applications all of our underdriving is done with the
crank pulley, not the accessory pulleys. This is done so maximum
weight loss can be achieved at the crank where most of the
horsepower gains are found.
Standard Belt Layout (Stock Diameter)
As with our stock diameter crank pulleys many of our customers
have also asked for stock diameter pulley sets that do not
underdrive their alternators, power steering pumps, superchargers
and water pumps. Because of these requests we developed our stock
diameter pulley sets. Many customers want the performance benefits
of weight reduction without any sacrifices, especially audio
enthusiasts as some audio competitions require voltage to remain at
a specific level. With our stock diameter pulley sets the
alternator and other accessories spin at stock speeds with
NO underdrive. This is also important for stock or
aftermarket supercharger systems. These systems are either driven
off the alternator, air conditioning or power steering sections of
the crank pulley and now you can use our stock diameter pulley sets
with these supercharger systems and have the same boost you had
with the factory crank pulley.st level with the use of the factory
diameter crank pulley.
100% of the power gains from the stock pulley sets comes only
from weight reduction versus the factory crank pulley. The reduced
weight allows for more power transfer to the drive wheels.
Features
- Real HP & torque gains across entire
RPM range
- One of the highest HP/Torque per dollar gains on
the market
- The broadest range of applications available
- Over 8 years of use in real world applications from street to
strip to rally to road course
- Better than OEM belt fitment & alignment
- Accessory pulleys available seperately for many
applications
- CAD designed & CNCd from 6061
Aluminum billet
