Understeer Anyone?
 

I put off writing this Thread with this question for months thinking it was just my imagination, maybe my tires, or maybe just the way I drive. But I have noticed an understeer in my '09 Z for a while now. I currently have 30k on it. When rounding a corner at speeds of 50+ mph, it seems I have to really concentrate to make the car go exactly where I want. There seems to be a fraction of a second of a delay in turning and it doesn't matter if it's a left or right turn. It seems like it's been more noticeable since I got my Michelin Pilot Super Sports or maybe I just didn't notice it when I bought my Z which had Potenzas. I searched here for threads regarding this issue and didn't find any so maybe it IS just my imagination. Anyone else feel this way? It's really just an annoyance but it seems that I never felt an understeer in my '07 350Z.

No other mods to the suspension other than you got new tires?

need more info....

You need swift springs and sways, car still sketchy.. Reviews say it all

When was the last time you got an alignment?

All stock and had it aligned when I got the Michelins about 5K ago!

Doesn't sound normal to me. Have you looked under the car to see if something's tweaked?

Not yet! I'm going to have Nissan look at it when I bring it in for service soon.

Look for worn out bushings or ball joints. Something's wrong, and it's not the tires.

Thanks Chuck :tup:

Could just be a combination of the softer sidewalls on the PSS and full tread compared to your old, worn down Potenzas. When you wear tires down you eliminate or reduce tread squirm, so they will feel sharper than when new.

That's what it sounds like to me.

Keep in mind the Z is a front-heavy car with staggered tires. Its bias is towards understeer.

If nothing's tweaked in the front end, this is the issue. A set of adjustable sways will solve the issue quite nicely.

A lot of it is just dealing with it and getting used to how the car drives now. The PSS are softer and not quite as sharp feeling as the Potenzas, but they grip oh so much more.

That has been pretty much my theory. The Michelins ARE noticeably softer! Thanks! :tup:

Great points...Thanks! :tup:

No problem. :tiphat: