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Further-honed engine response
Even more
linear throttle response
In addition to
aerodynamically-induced stability, the ultimate in vehicle
control calls for further detailed tuning to bring man and
machine even closer together. Drawing upon know-how acquired
through racing at Le Mans and in the Japanese GT Championship,
time-consuming high precision production methods have been
adopted to create an even better engine feel. We also worked
to improve the feeling of linearity between throttle operation
and the resultant variation in torque output.
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Blueprinting
and balancing of the crankcase assembly for engine feel and
response that will set your heart pounding
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The engine employs the
same kind of high precision dynamic balanced clutch cover, fly
wheel, and pulley assembly as is used in racing engines.
Highly qualified veteran technicians check each assembly with
a balancer, pruning away tiny specks of metal with their high
precision drill. Rotating weight tolerance is reduced to below
1/10 that of the base NSX, to correspond to the same exacting
standards used in racing.
To obtain the maximum effect
of this high-precision balancing, weight tolerances of the
piston and connecting rod pairs are controlled to within about
half that of the base model, just as in the original NSX-R.
Crankcase-side and engine block-side main journal diameters
are measured, and those having the same bearing metal
thickness are combined to increase metal clearance precision
and reduce friction. The adoption of these and other
time-consuming methods normally unheard of in mass-production
imbue the New NSX-R's engine with breathtaking response and
feel.
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Measuring the dynamic
balance of the crankshaft assembly
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Drive By
Wire system and accelerator pedal stroke circuit-tuned, for
improved throttle response
Circuit testing
has been extensively employed to tune throttle linearity and
response as part of the ongoing effort to improve vehicle
control quality.
The electronically-controlled Drive by
Wire (DBW) throttle has been tuned to reach full throttle at a
pedal angle reduced from the previous 81 degrees to 68
degrees, resulting in an accelerator pedal stroke reduction of
some 8mm. At the same time, pedal control has been tuned for
increased pedal weight. The result is a more solid pedal feel
with a more instantaneous, direct throttle response. Even if
the driver's foot is jarred by outside forces on the circuit,
the system has been tuned not to drastically change the
throttle angle.
The final drive gear ratio has been
lowered by 4.1% and combined to a close-ratio 6-speed gearbox
for sharper engine pick-up and exhilarating throttle response.
(All figures relative to base model.)
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DBW tuning
characteristics
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Accelerator pedal weight
characteristics
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