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HICAS
HICAS is the acronym for Nissans rear
wheel steering system named High Capacity Actively Controlled Steering.
HICAS works using different sensors which calculate speed, steering
angle and corner position the rear wheels are steered by a maximum
of 1 degree based on these measurements. HICAS helps eliminate body
and give the car a more nimble fell, it does it job well and is helpful
for the average driver who doesn’t push the car to its limits.
On a racetrack however HICAS becomes
to intrusive and unpredictable, particularly on long high-speed corners,
counter-steering is often needed to correct the Skyline though the
corner, this is not good for lap times. Race team’s usually use a
lock bar to disable the HICAS system which improves the Skylines balance,
resulting in more predicable handling and faster lap times.
Earlier
skylines (the R32) used a hydraulic system which had speed sensors
and used the power steering pump to steer the rear wheels. The newer
version named Super HICAS was used from the R33 onward; electric actuators
were used a long with a onboard computer, this version saved weight,
and is said to be a much improved system.
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