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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

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Old 05-07-2013, 02:26 PM   #1 (permalink)
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Default 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.
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Old 05-07-2013, 02:29 PM   #2 (permalink)
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No other mods to the suspension other than you got new tires?

need more info....
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Old 05-07-2013, 02:32 PM   #3 (permalink)
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You need swift springs and sways, car still sketchy.. Reviews say it all
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Old 05-07-2013, 02:40 PM   #4 (permalink)
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When was the last time you got an alignment?
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Old 05-07-2013, 02:45 PM   #5 (permalink)
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Originally Posted by wheee! View Post
No other mods to the suspension other than you got new tires?

need more info....
All stock and had it aligned when I got the Michelins about 5K ago!
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Old 05-07-2013, 02:48 PM   #6 (permalink)
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Doesn't sound normal to me. Have you looked under the car to see if something's tweaked?
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Old 05-07-2013, 02:51 PM   #7 (permalink)
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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.
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Old 05-07-2013, 02:57 PM   #8 (permalink)
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Look for worn out bushings or ball joints. Something's wrong, and it's not the tires.
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Old 05-07-2013, 03:00 PM   #9 (permalink)
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Look for worn out bushings or ball joints. Something's wrong, and it's not the tires.
Thanks Chuck
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Old 05-07-2013, 03:14 PM   #10 (permalink)
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Quote:
Originally Posted by JohnsZ View Post
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.
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.
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Old 05-07-2013, 03:16 PM   #11 (permalink)
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Could just be a combination of the softer sidewalls on the PSS and full tread compared to your old, worn down Potenzas.
If nothing's tweaked in the front end, this is the issue. A set of adjustable sways will solve the issue quite nicely.
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Old 05-07-2013, 03:18 PM   #12 (permalink)
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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.
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Old 05-07-2013, 03:22 PM   #13 (permalink)
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Originally Posted by m4a1mustang View Post
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!
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Old 05-07-2013, 03:24 PM   #14 (permalink)
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Quote:
Originally Posted by m4a1mustang View Post
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.
Great points...Thanks!
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Old 05-07-2013, 03:27 PM   #15 (permalink)
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No problem.
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