Hicas?

[Guest Sim32]

hey guys..

i just picked up my 32 gtst. and its really toey and soft in the rear end. This is the first car i have had with hicas (4ws) and i am finding it quite strange. What is hicas suppose to do, does it work at high speeds or low speeds? can u feel it in the rear?

also this car has stock shocks and springs in the back but lowered springs in the front. Can i lower the back without upsetting the 4ws? also..is there anyway to turn the hicas off? aka pull out the fuse? and if so, how does the car go without hicas.

cheers.

Sim

[Guest Boxhead]

im getting my hicas removed, i hate it, and i can feel it on most bends on my local main street, it gives me the shits and it feels to me like the back end isnt the same.

[MM2death]

Originally posted by Sim32

hey guys..

i just picked up my 32 gtst. and its really toey and soft in the rear end. This is the first car i have had with hicas (4ws) and i am finding it quite strange. What is hicas suppose to do, does it work at high speeds or low speeds? can u feel it in the rear?

also this car has stock shocks and springs in the back but lowered springs in the front. Can i lower the back without upsetting the 4ws? also..is there anyway to turn the hicas off? aka pull out the fuse? and if so, how does the car go without hicas.

cheers.

Sim

Hey Sim32,

Hicas is only like a 1 degree turn in the rear wheels and only kicks in at 80km/h and above (some say it works at all speeds)...correct me if i'm wrong. It will make that car feel somewhat floaty in the rear end. It's suppose to help overall handling of the car, but most people will agree that it's not that great at all. Yes you can lower the rear without doing anything to the hicas. You can get hicas locking kits that disable it.....and i'm not sure what will happen if you pull out the fuse....maybe do a search.

Here are some other threads that might be helpful:

http://www.skylinesaustralia.com/forums/sh...=&threadid=8292

http://www.skylinesaustralia.com/forums/sh...=&threadid=8970

http://www.skylinesaustralia.com/forums/sh...=&threadid=9188

Scott.

[akeenan]

Hicas is only like a 1-2 degree turn in the rear wheels and only kicks in at 80km/h and above.

this is not correct!

[MM2death]

Originally posted by akeenan

this is not correct!

Yeah sorry, i wasn't 100% sure, as i've heard people say different things about hicas. I have now edited my post.

Scott.

[Guest Sim32]

hmm, thanks guys. Still not to much is known about it. You can purcahase that kit, but i think that will be the last straw. I might just get some stiffer lower king springs in the back and see how that goes first. As when u turn in to a nice long corner the car does seem to hold very well. But when u back off and change direction or hit a bump, the car gets very very skatey indeed.

hmm intresting.

cheers sim.

[Lozza150]

Here is something i found on the web.....

Loz

What is HICAS? And do I have it?

Good question. HICAS is Nissan’s version of four wheel steering. It is an acronym for High Capacity Actively Controlled Suspension. Unlike other Japanese car manufacturers 4WS (eg Honda’s system) HICAS never exceeds +/- 1°. It is designed for high speed response rather than parking manoeuvres.

The system is electro-hydraulic - the ECU in the boot directs a hydraulic actuator at the rear axle to steer the rear wheels using the rearmost suspension links. The result is usually no more than 0.4° of movement. HICAS gives a touch of counter steer before settling with the rear wheel pointing the same way as the front. (Maybe this explains why my Skyline feels so loose on high-speed gravel...) This results in sharp turn-in, and enhanced stability at medium to high speeds.

Anyway, have a crawl under the rear of your Skyline and have a look. After following the description in the paragraph above .. you have HICAS. NB: The R33 series has an electronic actuator, it looks slightly different.

http://www.overflow.250x.com/diagnostics.htm

[Lozza150]

and for those wondering about "Super" HICAS.......

Skyline's Super HICAS

However, Nissan Skyline GT-R still proved that 4WS is worthy for demanding driving. Aided by computer, its Super HICAS system enable tightly-controlled power slide that cannot be implemented by any alternatives. When attacking a corner, the rear wheels will steer in reverse first in order to sharpen the initial steering response. Then, when sensors sense that the car responds to steering, the rear wheels will steer in the same direction as the front wheels, thus immediately introduces rear-tyre slip which help adjusting the attacking angle. Since the computer is monitoring the whole process, the amount of oversteering is always under check. You need not to be afraid of losing control.

http://autozine.kyul.net/technical_school/...ction_other.htm

[Guest Sim32]

hmm where can i get one of these tomei kits from?

just took my car for another belt, and when u boot it round a sharp corner the wheels sorta tromp up and down...its really odd.?

im lost

[Lozza150]

the "Tromp" is from Axle tramp.... caused by too much grip at low speed and One wheel spin before both kick in...(and no doubt other issue's as well).. I think everyone get's that at some time or another.....

Loz

[Guest Sim32]

what about when ur backing off around a tight corner? say u give it a little throttle then, should it shudder?

i think the stock shocks and springs in the back really arent helping, its so bouncy and the front is pretty stiff, lowered on teins, (i think)

cheers.

[RBN1]

as far as tramping goes. 32's, Z32's and S13's are known to do this. A set of pineapples fix this problem. (do a search on them)