ndk83

Theoretically; Will the DRS LDH system be affected by swaping out the suspension parts? or if (god forbid) someone installs a supercharger into their car?

I mean from the brief description provided it sounds like it shouldnt, but if the system takes into account additional factors such weight distribution, yaw and pitch, suspension travel etc it could be problematic. I know that the system is designed to work on a stock car, but i am very interested in finding out exactly how things like suspension upgrades and power upgrades will affect the system and therefore the car's handling.

Thoughts?

flipside909

Think christmas lights on your speedo cluster. The electronics involved to control LDH w/DRS are pretty precise in regards to calculating vehicle speed, wheel rotation, steering angle and etc. Lowering the car slightly may not do much but doing an extreme drop changes all the variables and trip the system into limp home mode.

ndk83

That sucks, Thats exactly what i was scared about. I was really excited about this DRS system. I hope your wrong though, and the lex engineers took into account that a small percentage of their car owners will modify the suspention (yea right!!!!!)

rominl

iTrader: (4)

the DRS steer the rear wheels according to speed right? if so i don't know what suspension geometry would have effect on. but then again i don't think anyone has solid proof on what will happen. looking at current lexus with all the vdim systems, people modify suspensions big time and no warning lights

fwiw, nissan gtr way back in the days it had rear wheel steer already, i am sure you can imagine how crazy people mod that cars into.

spwolf

i think you might be right... now only the question if aftermarket companies will design their suspension parts for that 4GS.

flipside909

DRS operates based on front steering angle and speed. Below 35mph, the rear wheels turn against the front wheels, anything above, the rear wheels turn the same direction of the front, up to a 2 degree variance.

Depending on how low you lower a car, it certainly does affect the longevity of other components. Most haven't had their car long enough to experience problems. Remember 2nd Gen GS and the problematic front ball joints? Most people that have ball joint issues are from those with modified suspensions.

It's obvious no one has solid proof on what will happen because no one has done it yet. Since there isn't any Lexus model out there with LDH w/DRS, we'll have to see what happens. If I were to get a 4th gen GS and had intentions to modifiy it, I would get a non LDH/DRS car. Then I won't have to worry about replacing a failed rear steering rack later down the road. For those looking to install coilovers on a 4th Gen GS w/F Sport or Luxury Package (Sport +), you totally defeated the ability of Sport + as you lose controls the shock dampening but will only gain the quicker steering response.

rominl

iTrader: (4)

i absolutely agree on the tear. when you put more stress on the suspension it will have more wear for sure. no need to look far, just look at stuff like sway bars. you put thicker ones and you put more stress on end links and in some case even the bracket holders.

i was mainly talking about from an operation point of view. if the DRS operates off front steering angle and speed, then lowering a car shouldn't have much effect, thus the system failure lights on the dash. now over time the wear on the system, that's a different story and that's inherent risks people take when modding cars anyway, not just on DRS

rominl

iTrader: (4)

especially given the driving dynamics of the 4gs, i think it would be silly if aftermarket companies don't work hard to come out with aftermarket parts

ndk83

Im more worried about driving dynamics than i am wear and tear which would happen regardless when u lower a vehcile. Time will tell, i am very interested to see results once suspension parts start coming in.

the new GS is itchin for a drop. For sure tuning companies are hard at work developing parts as we speak. Im very excited....