Unorthodox Racing Crank Pulleys |
|
Unorthodox Racing - Ultra Series
Standard Belt Layout - Underdrive Series (Ultra S)
Application: Audi
- Lightweight 6061-T6 Billet Aluminum
- CNC Machined to .001"
- Real HP & torque gains across entire RPM range
- Over 7 years of use in "real world" applications
from street to road course to rally to dragstrip
- Better then OEM belt fitment & alignment
- The broadest range of applications available
- High quality polished & anodized finishes
- Polished Aluminum
Here are our tried and true crank pulleys. Additional
power gains are seen from the underdriving of all the accessories
(which accounts for about 15% additional gain). However, we do not
push the amount of underdrive for two main reasons. First - it is
important to keep charging systems, air conditioning, power steering,
and water pumps moving fast enough for everyday driving. Second - not
much horsepower is gained from extreme underdriving. In most apps all
of our underdriving is done with the crank pulley, not the accessory
pulleys. This is done so max weight loss can be achieved at the crank
where most of the HP gains are found.
Understanding the 9 digit Part # A B C
D E F G H I
A Series (0 = Underdrive, 1 = 12V Charger)
B Product (2 = Standard Belt Crank, 3 = Single-Belt
Crank)
C D Vehicle Make
E Internal Use (0 = Assembly, 1 = Non-Assembly)
F G Vehicle Model
H Diameter (0 = Underdrive, 1 = Stock Diameter, 2 =
Overdrive)
I Color (Polished) |
