Finally got around to doing this over the weekend, and installed the HICAS bar, and removed the HICAS system from the car. Why do people do this? HICAS is a rather simple system, installed on pretty much all R32’s (hydraulic) and R33 (electric) to help the car corner at higher speeds. It works by having a small steering rack at the back of the car, which gives the back wheels a few degrees movement at speeds above around 70km/hr, to help the car corner a bit better. In some cases this can actually hinder expected behavior, with the computer deciding where to point the back wheels rather than the driver.
This is fine for joe public, but for race-use it’s an often removed item. Also in my car, I believe it was playing up, another good reason to have it removed.
Basically the process involves removing this rear rack, replacing it with a solid bar to take the place of this rack, and removing all associated piping and solenoids (used to regulate the fluid pressure) from the car. As a bonus it saves space, and also weight.
It took nearly a full day in the end, but the results should be worth it. Removing the hicas removes some 15kg as well, and added complexity which is not needed in the steering system.