So are there any Skyline GTR technical experts? HICAS?

GTRJazz · Post by **GTRJazz** » Sat Dec 23, 2006 12:11 am

stuartstaples wrote:Thanks Paul

Welcome back mate :thumb:

Just changed jobs Again! Jet engines to Jaguar R&D lots of stress, living away from home and worst of all no computer access.

GTRJazz · Post by **GTRJazz** » Sat Dec 23, 2006 12:21 am

323ian wrote:Sounds roughly right but the HICAS on the late spec R32's are also electronic.

Both my GTRs are 90/91 models so my Knowledge of GTRs may not be good for newer cars. Its best to challange advice on the net so others may input there own experiences. Sometimes you get a whole group of people with the wrong info then it gets a problem

323ian · Post by **323ian** » Sat Dec 23, 2006 7:57 pm

Has anyone locked out there HICAS and what are thier thoughts on this?

GTRJazz · Post by **GTRJazz** » Tue Dec 26, 2006 10:54 pm

I think it helps you corner better but only if you have the standard wheel tyre sizes (slip angle) suspension height, speed sensor inputs. If you change any of these then its best removed.

slaphead · Post by **slaphead** » Tue Dec 26, 2006 11:30 pm

323ian wrote:Has anyone locked out there HICAS and what are their thoughts on this?

I had it done on my R32 - the back end is more solid in corners (less twitchy) - I got a bit piddled of with correcting its corrections half a second after the car was stable :lol: - it does compromise the turn in slightly, so that is something you'd need to take in to account.

That's just my opinion - others might have different views.

~Mark

323ian · Post by **323ian** » Thu Dec 28, 2006 7:42 pm

Thanks for the input Mark.

So would you be able to post up benefits versus cons with it on and off please so i could make a good decision?

I cant help thinking that Nissan spent lots of money to develop it only for me to remove it but i feel my car becomes very twitchy at times.

Post by **Ben** » Sat Dec 30, 2006 10:59 am

I beleive the whole point of hicas is - "emergency lane changes" - but here is the blurb anyway

HICAS (High Capacity Actively Controlled Suspension) is Nissan's rear wheel steering system found on cars ranging from the more recent Skyline and Z iterations to smaller models like the 240SX/180SX. It is also found on models from Nissan's Infiniti division, such as the Q45 and the M45/M35. Unlike other four wheel steering systems, HICAS and Super HICAS is fitted to improve handling rather than as a parking aid.

Earlier HICAS versions used hydraulics to steer the rear wheels. The hydraulic system was powered by the power steering pump and used speed sensors to determine how much and which direction to steer the rear wheels. Later versions, called Super HICAS, moved to an electric actuator for the rear steering rack, making the system much lighter. The Super HICAS system also used its own computer to control the system instead of speed sensors. HICAS and Super HICAS rear wheel steering is limited to about 1 degree in either direction.

HICAS was introduced on the 1986 Skyline GTS coupes (GTS, GTS-R, and GTS-X). The system was later adaped to work on many models in the Nissan range, beginning with the Passage GT.

Retrieved from "http://en.wikipedia.org/wiki/HICAS"

323ian · Post by **323ian** » Sat Dec 30, 2006 8:47 pm

Thats well helpfull Ben, now off to look at this wikipedia!