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18 AUTOMOTIVE AFTERMARKET MAGAZINE PERFORMANCE GUIDE 2013
Specialist Australian competition brake supplier CompFriction, in conjunction with AP Racing, has been confirmed as the
official brake supplier for V8 Supercars' new Car of the Future (CotF), which launches this year.
CompFriction worked closely with AP
Racing, a world leader in competition brake
design and manufacture, to create a completely
new 'control' brake package from scratch
tailored to suit CotF's specific requirements
rather than using off the shelf components.
These requirements included the need to
reduce expenditure for teams through lower
component costs combined with longer service
life.The new package is aimed at improving
service life by at least 20 percent.
Better cooling was also required,
particularly on the front brakes as they are
subjected to more than 60 percent of a V8
Supercar's total braking effort and can reach
temperatures exceeding 800 degrees Celsius.
The new CompFriction/AP Racing control
brake package will be mandatory for use in all
V8 Supercars built to comply with the new
CotF regulations which began on January 1.
The package consists of complete front
and rear brake assemblies comprising disc
rotors, multi-piston calipers and a selection of
The CotF spec AP Racing cast-iron front
disc rotor has an overall diameter of 395mm,
a 25mm increase over the old brake system.
This increase in swept surface area, and
therefore braking power, has been made
possible due to the increase in the mandated
CotF wheel size from 17 inches in the old cars
to 18 inches in diameter.
Front rotor width has also been increased
from 35mm to 40mm using AP Racing's
'wide vane' technology that results in greater
disc rotor width without an increase in casting
A 5mm wider air gap within each vane
provides much improved brake cooling with
only a minor weight increase of 500 grams
over its predecessor.
The AP Racing front caliper features six
pistons housed in an extremely rigid forged
aluminium mono-block design.
The caliper's unusual asymmetrical form
has been designed to share loads evenly
throughout the caliper body to maximise
performance and component life.
The AP Racing rear disc rotor has an
overall diameter of 355mm and overall width
of 32mm, which represent mild increases
over previous components.
The less powerful rear caliper shares the
same forged aluminium mono-block design as
the front rotor, but features four pistons
instead of six.
This new rear brake package has also
resulted in an overall minor weight reduction.
CompFriction will control the supply of all
brake pad materials.
CotF spec V8 Supercars can run three
types of pad material on the front brakes
produced by Performance Friction, Project
Mu and Ferodo.
Three types of pad material are also
mandated for use on the rear brakes including
Performance Friction, Pagid and Ferodo
The new CompFriction/AP Racing CotF
brake package has result in a 15 percent
increase in total brake pad volume.
Technology and Experience
According to CompFriction's General
Manager, Nicholas Bates, AP Racing's cutting
edge technology and global experience in the
development of tailor made brake packages
was crucial in its selection as V8 Supercars'
official CotF brake supplier.
"AP Racing has a dynamometer in the UK
that can run full circuit simulations based on
data supplied by race teams, which allowed
us to pinpoint where specific improvements
were needed in the V8 Supercar braking
system," he said.
"For example, we were able to duplicate
real race conditions at tracks like Symmons
Plains in Tasmania, which is one of the
toughest circuits on brakes you'll find
anywhere in the world.
"Not only that, we were able to duplicate
the exact track conditions as experienced by
V8 Supercars in the heat of battle in amongst
traffic, where cooling is less than ideal."
Mr Bates said having the ability to do the
back-to-back testing with the old brake
system in controlled laboratory conditions
allowed the company to come up with a very
refined package that delivered big gains in
cooling and service life.
"The initial design of the asymmetrical
caliper was done by AP Racing's advanced
computer program," he said.
"We basically fed all the loads and
requirements into it and the computer
produced a model which represented the
ultimate component that could be made to
meet all of those requirements.
"Initial testing of the CotF brake package
by V8 Supercars teams has shown they're very
pleased with the package we've come up
with, which can only be achieved when you
have access to such advanced technology and
In addition to its role as official V8
Supercars brake supplier from 2013,
CompFriction will also supply CotF teams with
AP Racing multi-plate clutches, AP Racing
on-board air jacks and Goodridge hose
COMPFRICTION/AP RACING CONFIRMED AS
OFFICIAL V8 SUPERCAR BRAKE SUPPLIER
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