& Newer Hellcat Challenger & Hellcat Charger, Trackhawk, Demon, Redeye,
Durango, and TRX Applications
Motorsports offers the original precision-made supercharger pulley
upgrade for the Hellcat! Like all Metco Motorsports pulleys, this pulley
is an interchangeable unit that is based on a precision-machined, stainless-steel
pulley hub, an interchangeable pulley drive ring, and a stock-appearing front
pulley cover. The pulley ring and cover are anodized in black, and all
included fasteners are stainless steel or zinc plated. All components are
precision-machined on a state-of-the art CNC lathe and are perfectly balanced
to ensure smooth operation at all engine speeds and to maximize reliability.
These pulleys are manufactured with great care, and special attention is
paid to the shape, height, and spacing of the pulley grooves to ensure maximum
belt engagement. This extra effort makes it unnecessary to add a textured
surface to the pulley ring, as these coatings contribute to belt noise, belt
dust, and they rapidly accelerate belt wear.
choose your desired pulley ring size from the drop-down list below. All
components are available separately, so once you have our pulley on your
Hellcat, a boost change is as simple as changing the outer pulley drive ring.
All boost level changes require the appropriate PCM revisions and the
proper supercharger belt. Please note that quoted boost gains are
approximate, and that your results may vary. The 2.85" and larger pulleys are intended for street applications, while the 2.75" and smaller pulleys are
intended for race applications or applications using supplemental injection.
Please consult your tuner for a specific recommendation. Note that quoted
boost gains will be higher in Demon and Redeye applications as a result of the
larger supercharger used in these vehicles.
the components in these supercharger pulley kits are available separately and
are listed elsewhere in this section.
*The Gates K100572HD belt is appropriate for applications using
the 2.85", 2.75" or 2.65" supercharger pulley.
Note: The original supercharger pulley threads off the blower
shaft once the top of the supercharger has been removed and the snout separated
from the case. We manufacture a steel insert that accepts a 15/16"
wrench or socket just for the purpose of un-threading the original pulley,
available separately under part number HPT1000, or in the drop-down
below. The unique Metco pulley hub design incorporates a similar 1"
hex, so a wrench or socket can be used on the pulley hub itself for
installation. The Pin Holding Tool (PN HPT2000, described
elsewhere in this section) is also available to assist in holding the
supercharger pulley shaft stationary while the hex tool is used to unscrew the
original supercharger pulley. The Pin Holding Tool requires the optional
adapter (HPT2001) to properly fit the larger supercharger used in the
Demon and Redeye application.
pulley is intended for professional installation only. The upper portion of the
supercharger must be disassembled so the supercharger snout can be removed.
Installation instructions are not provided.
When the supercharger pulley
is changed, the PCM calibration requires revisions to accommodate the increased
level of airflow. However, some installers have used the 3.10" and
3.20" sizes with excellent results, without revising the PCM tune.
We always suggest looking at the tune after the pulley change to confirm
proper air/fuel and timing calibrations, in the interest of maximizing
reliability and longevity.
assumes all risks. Installation of this pulley may affect your warranty.
Despite the claims made by another pulley 'manufacturer', the (6) bolts
that secure the pulley ring to the pulley hub do not bear the load imparted by
the supercharger belt. The belt pulls the pulley in a downward direction,
and the ID of the pulley ring against the mating surface of the pulley hub is
the designated location for the belt load. This specific design has been
in use for more than 20 years without failure, in all types of severe-duty
applications. Anyone who claims that it is the fasteners that bear the
load does not properly understand the dynamics of a supercharger drive.
Part Numbers: HCP3.20, HCP3.10, HCP2.85,
HCP2.95, HCP2.75, HCP2.65, HCP2.50, HCP2.40, HCP3.35