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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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