Home' Australian Automotive Aftermarket Magazine : Australian Automotive Aftermarket e-Zine - Perf 18 Contents PERFORMANCE
BRAKE & CLUTCH
Effective braking and optimum stopping
distance is vitally important, not only for
the driver but also other road users
During regular maintenance of the vehicle’s
drum braking system, the mechanic is often
faced with the task of replacing the brake shoes
or relining these.
Where a complete Bendix brake shoe is not
available, the Bendix drilled brake linings in kit
form offer a number of practical benefits.
The high-quality steel zinc plated rivets provided
in the kit offer high strength, resistance to
abrasion and corrosion whilst retaining their
intrinsic structure ensuring the bond to the brake
shoe lasts the full life of the lining.
The engineered rivets provided are easy to apply
with standard workshop equipment and
effectively bypass the time-consuming procedure
of bonding the linings to the brake shoe.
Designed to suit their OE specifications, Bendix
linings accurately align with the drilled holes
providing a cost-effective way of avoiding the
expensive replacement of the entire brake shoe
and also reducing both time on the job and
downtime for the vehicle.
With a comprehensive range that covers most of
the OE commercial vehicle applications, Bendix
drilled brake linings and brake shoes are
available from leading commercial vehicle parts
To see the full range of linings, visit
trailer-application-guide or talk to your local Bendix
When it comes performance cars,
the guys at Exedy know a thing or
two about making them fast and
In these applications, they say it is
all about understanding torque and
horsepower when it comes to
choosing the right clutch.
“When the bench racing starts it is
way too easy to get lost in the hype
of engine power,” Exedy Product
Manager, Mark Davis, said.
“Engine torque is what really matters
when it comes to getting the power to the ground and measuring clutch performance.
“Torque is the measurement of force, or let’s call it twist, applied in a rotational motion. Simply put,
the higher the engine torque, the harder it twists and the faster the car will accelerate.
“Power on the other hand is the measurement of distance, or in this case rotation, covered over one
second due to the Torque applied over this time.”
Clutch performance is measured by the maximum amount of torque applied through the driveline
before the clutch will begin to slip. This is known as the clutch’s Torque Capacity.
“Power will get you over the mountain, but torque is what moves mountains,” Mark quipped.
Peak engine torque is the point in an engine’s rev range where the most torque is being generated.
This Peak Engine Torque is independent of the engine’s RPM.
Peak engine power is the point in the engine’s rev range where the relationship between engine RPM
and the torque applied at this RPM, not peak engine torque, is most efficient.
“Peak engine torque is the maximum amount of force applied to the driveline at any one time,” Mark
“While the amount of torque can be calculated at any specific power output and engine RPM, peak
engine torque cannot be calculated by using peak power output and engine RPM.”
Generally, the amount of torque being applied to the driveline at peak power output is significantly
lower than peak torque. This can be seen in the sample engine dyno meter chart.
“Power and torque curves vary greatly for each type of engine and even more so with different engine
tunes and other modifications,” Mark said.
“Basing your clutch selection on peak power output can lead to serious deficiencies in Clutch Torque
Capacity and could easily result in incorrect a clutch that does not meet your customers’ needs or
To ensure you make the correct clutch selection for your customers specific applications, Exedy invites you to contact
its team and talk to a clutch expert by calling 1300 366 592 or visiting www.exedy.com.au
TORQUE NOT POWER
The driving force behind performance clutches
AAAM FEB 2018 - PERFORMANCE:AM MAGAZINE SHELL 6/2/18 11:27 AM Page 14
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