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Old 01-04-2012, 04:13 PM
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4ws/SI

How can you tell the difference? And wat is the difference? Wat does 4ws mean?
I already tried researching on this forum and couldnt find anything.
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Old 01-04-2012, 06:43 PM
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Re: 4ws/SI

http://www.definition-of.net/4ws

useless feature which is expensive to repair/maintain

when there is more parts there is change that they will also break
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Old 01-04-2012, 08:32 PM
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Re: 4ws/SI

four wheel steering, electronically controlled. the third gen 4ws is all mechanical and superior IMO.
si trim comes w/ h23 motor
s trim comes w/ f22 motor
si vtec trim comes w/ h22 motor.
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Old 01-05-2012, 01:28 AM
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Re: 4ws/SI

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Originally Posted by ogsmakdade View Post
the third gen 4ws is all mechanical and superior IMO.]
Stop trying to make facts your opinion!

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Old 01-05-2012, 01:30 AM
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Re: 4ws/SI

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Originally Posted by HardKnoxBB2 View Post
Stop trying to make facts your opinion!

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As it is, I wouldn't trust you washing my balls. And I typically let any trick hoe from OT do that.
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Reading this thread was like watching pulp fiction the first time...

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Old 01-07-2012, 12:32 AM
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Re: 4ws/SI

So then it's useless lol
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Old 01-07-2012, 12:35 AM
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Re: 4ws/SI

How do you get useless out of that?

No one said that at all.
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Old 01-07-2012, 04:17 AM
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Re: 4ws/SI

Then wat exactly is it used for?
Serious question.
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Old 01-07-2012, 08:41 AM
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Re: 4ws/SI

4 wheel steering...

All 4 wheels turn with the steering wheel...

Honda Prelude 4 Wheel Steering - YouTube
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Old 01-07-2012, 10:26 AM
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Re: 4ws/SI

Dynamic rear toe feels awesome.

The electronic is 10 more advanced than the mechanical in the 3rd. The electronic looks at vehicle speed, steering angle, and steering speed to calculate the amount of rear steer to give. So if you gingerly turn in to a corner the rear steer amount will be different than say if you chuck it in.
4ws also moves the rotational axis further back in the car, so the middle of the car is turning not just the front. This improves the balance of the car and weight transfer.
I can get some crazy rotation with mine. But if it gets sideways, good luck getting it back, any type of counter steer will throw the car that direction and loop you around. Best thing to do is to ease slightly up on the steering input very slowly, the car will come back.
As far as reliably goes the only problem I had with mine is that the solder joints failed on one of the large relays that controls the high current for the 4ws unit. It was a easy fix of taking the computer out and re soldering the connection, which was cracked. From what I read this is the only common problem.

I wounder how many people here have actually driven a 4ws Prelude.


These are translated from Honda's factbook so expect them to make little to no sense in English.

Quote:
After the hyper-wheel steering program 4WS.
Rudder steering angular speed control is performed based on each of the three parameters. Depending on the ever-changing situation, to determine the optimal rear wheel steering angle. ● Speed ​​control varies the speed according to the characteristics of the ideal. Low-speed maneuverability Improved Medium: Improved handling performance speed: improved stability and speed straight ● rudder control (medium to high speeds), it changes depending on the characteristics of the optimal steering angle and steering. Small steering angle steering: improving driving stability large steering angle, steering wheel: reduction of understeer steering angular speed control ● (medium to high speeds) corrects the steering angle when the steering is quick. Fast steering: Improved turning round slowly steering: Improve handling and stability


Quote:
Configuring Hyper 4WS
4WS of the underlying system is hyper, ECU seven special sensors and electronic control unit (), and the rear steering actuator is composed of the rear wheels to steer it.
Vehicle speed, steering angle, steering angular speed, rear wheel steering angle signal and all the main CPU in 16-bit ECU boasts a highly reliable dedicated central processing unit () is made ​​by the sub-CPU and high-speed operation. Also, the rear steering actuator directly drives an electrical signal by the ECU in all situations.

■ Operating Principles of hyper 4WS
Working Principle
(1) measuring the steering angle and vehicle speed sensor from
(2) Calculate the angular velocity of the steering angle changes at the helm of the ECU
(three) steering angle, steering angular speed, steering angle computed from the target vehicle speed
(4) at the sensor rear wheel steering angle is measured
(5) motor-driven power system at the ECU
(six) matches held in position with the rear wheel steering angle target rudder angle
Quote:
When low speed ■ (~ 30km / h)
improved maneuverability: To improve the maneuverability performance, rear-wheel steering angle and the program will be of opposite phase are linearly according to steer the vehicle speed and steering angle handle. (Maximum steering angle: -6 ) This results in a smaller turning radius, the inner small difference can be performed for smooth maneuverability.


Quote:
When the speed of ■ (30km / h ~)
Improved handling characteristics: medium to high speed when driving, when I started off the steering head may times (yaw rate) in order to appropriately balance and stability, the small steering angle The same phase. Extra large rudder angle (understeer condition) and when made ​​in opposite phase, which acts to reduce understeer tendency.


Quote:
Improved Stability at high speeds in particular, the rear wheel steering angle is relatively large rises in phase. By reducing the lag phase during the next G steering, side of the body shake reduction, improving high speed stability.


Quote:
Improved turning round: If the steering is quick cut (large rudder angular velocity) is to increase the responsiveness of the body, small turning angle and steering angle to compensate, may head once (yaw rate) increases the .


Quote:
Rear steering actuator to control the direct and accurate steering angle of the rear wheels.
Receiving electrical signals from the computer, to control rear wheel steering angle in real time, the rear steering actuator unit. The ball screw motor was integrated into a large, rear-drive screws directly to the steering shaft. Right stroke, controlled directly by each of the stroke left motor. As a fail-safe, return spring and electromagnetic damper is adopted. During the event, cut power to the motor ECU, back to the neutral position to force the rear wheel steering angle.
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Old 01-07-2012, 03:03 PM
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Re: 4ws/SI

I've driven 3gen 4ws, not the 4th. I've only ever seen two 4ws 4ths in person.
The electronic components for the 4th gen 4ws system are expensive to replace when they fail, hence my support for the previous mechanical version.

Great info as always Dwend.
p.s. any time you want to let me drive your car, I'll be glad to edit all previous posts on 4th gen 4ws accordingly
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As it is, I wouldn't trust you washing my balls. And I typically let any trick hoe from OT do that.
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Reading this thread was like watching pulp fiction the first time...

Cool quote Utopia.
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Old 01-07-2012, 03:46 PM
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Re: 4ws/SI

Daniel killed this thread like usual!
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Old 01-07-2012, 06:33 PM
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Re: 4ws/SI

lol, I'll let you drive it. Come up to VA or NC.

Last time I checked there was only 1 "new" 4ws computer in the US, which might explain the $3,000 price tag. But the local Honda only junk yard has them for $50. The 3rd gen you can't get Honda genuine 4ws parts, for most of the parts are discontinued. The 4th gen still has all the 4ws parts available, granted they are at crazy prices, but they are still available.
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Old 01-07-2012, 08:26 PM
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Re: 4ws/SI

Okay I get it now, now I know for a fact its not useless.
Makes me love my ludes even more.
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Old 01-07-2012, 08:54 PM
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Re: 4ws/SI

if it was useless honda wouldn't have developed it lol
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Old 01-07-2012, 10:41 PM
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Re: 4ws/SI

Quote:
Originally Posted by Dwend View Post
lol, I'll let you drive it. Come up to VA or NC.

Last time I checked there was only 1 "new" 4ws computer in the US, which might explain the $3,000 price tag. But the local Honda only junk yard has them for $50. The 3rd gen you can't get Honda genuine 4ws parts, for most of the parts are discontinued. The 4th gen still has all the 4ws parts available, granted they are at crazy prices, but they are still available.
the other prelude sites hold meets in obx and va, hopefully we meet up at one some day. I plan to hold you to your word
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OGGS is a stuff a nerd in the locker type. He's only mellowed out 3 months ago.
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As it is, I wouldn't trust you washing my balls. And I typically let any trick hoe from OT do that.
Quote:
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Reading this thread was like watching pulp fiction the first time...

Cool quote Utopia.
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Old 01-08-2012, 10:21 AM
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Re: 4ws/SI

when I searched lude for myself I made sure that I dont get one which have 4ws

its pretty useless IMO and like I said when there is more parts that can break, maintenance will be much more expensive (havent heard that good stories about cars with 4ws, and they are kinda one weak link there more)
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Old 01-09-2012, 08:39 AM
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Re: 4ws/SI

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Originally Posted by TypeT View Post
when I searched lude for myself I made sure that I dont get one which have 4ws

its pretty useless IMO and like I said when there is more parts that can break, maintenance will be much more expensive (havent heard that good stories about cars with 4ws, and they are kinda one weak link there more)
Sorry but that is a load of crap. I have had 2 5G's with 4WS and neither has ever gone wrong or needed any maintenence as the unit is electrical, hence no fluid changes etc.. True there are some Ludes that have problems, but no one says if they have been using heavy 18" wheels or what they have been up to.

4WS is great in two particular scenarios:
1. Low speed maneuvers (parking) being able to swing round in tight spaces for such a long car is awesome.

2. Reducing understeer! I track my 4WS 5G as well as my 2WS 4G and the 4WS improves cornering.
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