While MINI may have given the Gen1 Cooper "S" owners a
literal boost over standard Coopers there is no reason to be comfortable
with 163HP. One of the best ways to turn up the power is to turn up the
boost.
The ALTA Performance 15% reduction supercharger pulley does just that.
With the simple installation of this pulley and no other modifications
will raise boost 3-5 psi, and more than 20WHP.
With a 15% pulley the rise in boost pressure will increase 15 to 20 horse
power. No other modifications to ECU etc., required. Customers with
other existing modifications or those seeking more HP the results can be
even better with the addition of a header, intake, intercooler and
exhaust!
ALTA Performance was the first manufacturer to design a two piece,
taper fit Mini Cooper Supercharger Pulley. Today, it is the most
imitated design on the market. Now we’ve upped the ante with the ALTA
Performance Version 2.0 Supercharger Pulley with 15%,
reduction.Installation is easier than ever. And results are even more
fantastic. The ALTA Performance pulley features a stainless steel
supercharger shaft coupler with installation site aperture and the first
to offer direct torque technology. Ultra light aluminum body decreases
rotational inertia and overall weight. Oversized belt retainers and belt
groove teeth increase belt grip. A decorative end cap faceplate
provides a clean sleek look.
Design
The ALTA Performance pulley features a stainless steel supercharger
shaft coupler with installation site aperture.Independently attached to
the supercharger shaft ALTA is the first to offer Direct Torque
Technology (DTT). The older design uses bolts to do the job of holding
each piece together, and compressing the taper. The Direct Torque
Technology (DTT) applies all twisting force from the pulley to the hub,
and uses separate bolts to secure hub to shaft. This reduces the work
the bolts have to do. Our new pulley is also designed to be completely
balanced with in .02 grams (better than stock), keeping your
supercharger bearings happy.
Direct Torque Technology (DTT) allow us to use two different
materials without having problems with different material expansion
rates. Our hub is made of Stainless, and the pulley body is Aluminum.The
SS hub takes most of the force, and does the biggest job of securing
the pulley to the shaft. The ultra light weight 6061T6aluminum pulley
body decreases rotational inertia and overall weight. Oversized belt
retainers and grooved belt teeth, decrease the possibility of belts
jumping off, and increase belt grip. Cooling holes are drilled into the
belt retainers to keep pulley temps in check. A decorative end cap
faceplate provides a clean sleek look.
Ease of installation
Simply lift the engine, remove stock pulley using the ALTA
Version 2.0 pulley puller and slide your new ALTA Performance Version
2.0 pulley directly onto the supercharger shaft, tighten bolts, and your
done! There is no reason to remove the entire supercharger to pull
off and press on a pulley.
Some Unique Features
The DTT hub, and the way it secures to the supercharger shaft, makes for
a great replacement part for those who have had other pulleys slip and
cause damage to the supercharger shaft. Our hub can help when a previous
pulley has worn the S/C shaft down as much as .020".
Since the outer pulley is held on by 3 high quality screws, and is not
responsible for holding the pulley to the supercharger shaft (like the 2
piece taper fit), it can be replaced with a different size very easily.
Simply remove the ALTA cap, loosen the screws, and replace! You could
increase your power with a smaller size in a matter of minutes!
We don't use thread locker for a reason! Many other pulleys use a
thread locker to ensure bolts don't back out. The problem with thread
locker is that it can create a false torque setting when tightening
bolt. And not be fun to remove. We have incorporated lock washers which
eliminate the need for thread locker, and allows for proper torque
readings when tightening bolts.
Included items:
- Mounting hub
- Pulley body
- 2 hub bolts
- 3 body bolts
- 5 lock washers
- Cover plate
- Instructions
- 2 stickers
NOTE: OEM pulley requires special pulley removal tool for proper removal.
Fits the following MINI models:
R52 2004-2008 Convertible Cooper S
R53 2002-2006 Hatchback Cooper S
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