Triksterism

This is something I've never experience in any car I've owned previously ('99 Honda Accord Coupe, '98 Mercedes SLK 230, '05 Hyundai Tiburon GT) and it's been spooking the hell out of me in my G37xS Sedan (2013).

Say I'm doing something as a trivial as taking an off ramp on an interstate: If I turn past a certain degree (not even sharp degrees) and going at idk 30-40, I'll feel a sort of 'slip'

It's a feeling I get whenever I'm even taking slower corners so long as I 'overturn' I'll feel the slip.

I'm not a car wizard (I'm willing to learn) so any help is appreciated. Also it seems like I can feel the road a lot more than in my previous vehicles (though one of my friends says it feels smooth but **** me if im not bumping around on any of the roads).

I've had my car in at a local Infiniti dealership for my 30k maintenance and they said nothing is wrong (this was months ago though).

slartibartfast

iTrader: (7)

You feel as if the rear end is going to let go? As in oversteer?

Triksterism

More like the front end, as if im on ice (but this feeling happened during the summer as well).

slartibartfast

iTrader: (7)

So more like severe understeer. Well, that's part of the AWD experience. Everyone thinks it's safer to slid off the road nose first than tail first (oversteer).

Of course, you can change that behaviour. Look in the suspension forum for lots of info. Hint: stiffer rear sway bar.

If you spend a lot of time on snow or ice, think twice about changing chassis balance unless you are comfortable with the back end hanging out.

JSolo

iTrader: (14)

Are you sure you didn't hit a patch of ice or snow?

Check the ps reservoir for proper fluid level. If anything steering related was touched recently, maybe air in the line.

What happens if you slowly turn it lock to lock while not moving? Required effort should be consistent throughout.

dkmura

Actually, the reason most cars are engineered with to understeer is predictability. In most conditions, an understeering car will provide more feedback during cornering before exceeding the limits of traction. An oversteering car on the other hand, may leave the road (backwards) before providing any feedback.

blnewt

iTrader: (13)

What condition and what brand tires are you running? If they are the Goodyear RS-As they are very poor performers and get real bad as they wear down.

PNW_IPL

iTrader: (5)

I'm going to say your alignment is way out of spec

slartibartfast

iTrader: (7)

Boy howdy. Despite having DSC and traction control on, I suffered a snap oversteer at my last track event in the G.

BTW, did you use that ... um, bell housing(?) we (NISsport) sent you a long time ago? Don't quite remember what it was now.

Triksterism

I'll have to check but I suspect they are stock. At one point I was going to look into getting new tires, might as well do that now.

Seems the Pilot Sport A/S 3+ are what everyone seems to recommend and some people seem to get different widths in back vs front too, hrm! When I get new tires I should get my alignment checked.

As for fluids, they were all supposedly checked when I had my 30k maintenance check at my local Infiniti dealership.

blnewt

iTrader: (13)

Since you have AWD running the same wheel widths all around I'd stick to the same tire sizes on all four. If you decide to get a new wheel set you can run staggered but keep in mind the tire diameters front & rear must be less than 1% off. Here's a post that lists staggered sets that work on AWD.
https://www.myg37.com/forums/brakes-...ml#post3992771

I'd also look at BFG Comp2 All Season & Continental DWS06 tires, those along w/ the Pilot A/S are top rated.

Triksterism

I was looking at all 3 of those last night. People seemed to say the DWS06's give the most comfortable ride but really have a floaty/boat type feel to them and that the Comp2's feel way too harsh and that the Pilot A/S's are -the- choice.

My only question with the Pilots is W vs V. Seems like most people get W's.

JustROLLIN

iTrader: (1)

I would agree with the comments above that alignment might be the cause of some of your issues. Things like caste can impact the way the wheels return to straight ahead. From time to time, drivers think they are slipping, when in fact that just feeling something pulling in a way they did not expect.

I would imagine the car is not slipping at slow speeds, which leads me to believe alignment or loose parts might be your culprit. You can typically have an alignment checked for free or as little as $20 by a local shop. They can shake down your front end at the same time and check tread depths as well. You cover all the bases this way.