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Outstanding
cornering speeds achieved
under all conditions from high to low speeds
For
ultimate speed on the circuit, a specially designed
tire with an asymmetrical tread pattern was selected.
At the same time, roll rigidity, performance envelope
and response were all increased in the pursuit of
further improved cornering speeds. The newly gained
aerodynamic stability leads to improved high-speed
stability, allowing the understeer setting previously
adopted for low to medium cornering speeds to be
reduced. Front turn-in response has also been increased
toward a more controllable setting for the driver.
To supplement the added speed, braking capacity
has also been increased, particularly in the area
of fade resistance on circuit runs. The anti-lock
brake system has also been fine-tuned for even greater
stability when braking hard at high speeds.
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Combining
high-speed stability with low-speed cornering performance
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By
contributing to increased high-speed stability,
the aerodynamically induced downforce achieved in
the New NSX-R has allowed the selection of a harder
suspension setting to further increase cornering
performance and overall dynamic performance.
Overall, the suspension is tuned to promote higher
cornering limits and improved handling response.
The first issue we addressed was roll rigidity,
equipping the NSX-R with heavier-duty springs, new
spring material for reduced weight, increased damping
rates, larger stabilizer bars, reinforced damper
mount and rear control arm bushings for a sharper,
more responsive drive. The stabilizer bar bushing
is now self-lubricating for increased rigidity,
enhancing the stabilizer bar's effect.
Compared to the rear, the front suspension is tuned
to increase road holding. Reduced understeer contributes
to improved cornering behavior around tight bends,
while
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aerodynamically-improved
stability delivers superior performance at higher
speeds, for further enhanced performance under all
circuit conditions. LSD (limited-slip differential)
pre-loading has been tuned to take into account
the increased cornering performance provided by
aerodynamic downforce, for improved traction. Body
rigidity has also been fine-tuned, with the adoption
once again of front and rear tower bars. Although
the front tower bar is the same as that of the original
NSX-R, the rear one has been thickened from t1.0mm
to t2.3mm over the original setting, for increased
rear roll rigidity.
The dampers have also seen their damping rate increased,
although particular attention has been paid this
time to damping characteristics for minor inputs
at very low speeds, with the objective of further
smoothing out minor vibrations. The pistons used
in the dampers are now polished to minimize production
tolerances and reduce differences from damper to
damper.
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Comparison
of major suspension characteristics
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Extensive
circuit testing to determine the optimum
equilibrium between downforce and front-to-rear
balance
In
order to endow the new NSX-R with outstanding high-speed
performance, we turned our attention to aerodynamics
and their effect on high-speed cornering power,
braking, turn-in, and other aspects affecting vehicle
controllability. This led us to a new technical
approach called "aerodynamically-induced stability".
In addition to increasing high-speed cornering power,
we have also striven to improve vehicle control
quality - the ease with which the driver can control
the car, and thus exploit its full potential. This
enabled the chassis to be tuned for reduced understeer
at low to medium speeds. The resultant improved
handling at both low and high speeds endows the
New NSX-R with outstanding speed on all types of
circuits.
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Extensive
circuit testing to determine the optimum
equilibrium between downforce and front-to-rear
balance
The
third advantage of downforce is that it helps reduce
body roll as well as body pitch. This in turn helps
reduce sudden variations in vertical forces applied
to the tires at the limit, increasing vehicle stability
in the wake of driver input. Vehicle behavior is
also more linear near the limit of adhesion, contributing
to increased driver control. In other words, creating
downforce to press the vehicle onto the road as
speed increases not only contributes to increased
absolute cornering speed and thus absolute dynamic
performance, but also significantly improves vehicle
control quality as measured by response to driver
inputs and vehicle stability at the limit. These
are the fundamentals behind downforce and aerodynamic
stability as a means to improved high-speed vehicle
handling.
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Custom
designed tires and forged aluminum wheels
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Slit-surfaced
brake rotors
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