Understeer Anyone?

JungleZ · 05-07-2013, 03:38 PM

im not gonna lie i love the PSS, they are even good in the rain for me. Its the same as dry more or less

m4a1mustang · 05-07-2013, 03:39 PM

Yes I swear by PSS. Can't wait to wear my Potenzas out.

JohnsZ · 05-07-2013, 03:44 PM

Yes they are very good in the rain as I drove mine all winter long but I have to admit, the dry handling of the Potenza's was sharper and I'm not sure I would get the PSS again.

m4a1mustang · 05-07-2013, 03:45 PM

They may feel sharper, but the PSS will run laps around them.

houkouonchi · 05-08-2013, 04:38 AM

My hankook's are also a softer tire but if anything I would have to say I get oversteer a lot more than understeer when pushing the card hard.

EndyKwon · 05-08-2013, 05:05 AM

Quote:

Originally Posted by houkouonchi

My hankook's are also a softer tire but if anything I would have to say I get oversteer a lot more than understeer when pushing the card hard.

interesting, i'm also running hankooks k110 v12. i've gotten more understeer than oversteer in the canyons. i'd say the only time i'd actually end up with oversteer is when i feel like whipping the car around a 90º turn. i've learned my lesson, been there/done that, i don't really do that anymore after i bounced by stock rims on the curb.

whats your setup? i'm currently running 305/25/20R and 255/30/20F. It's more show than performance (theres a reason why I don't have them fancy ultra-lights or te37s), but it still gets the job done.

I know that hankooks are known to have soft sidewalls, so i believe thats whats causing the understeer. yet, i think i managed to remedy that issue (okay, maybe a not at all) by running 25-profile/30-profile rubber bands.

houkouonchi · 05-08-2013, 05:13 AM

Quote:

Originally Posted by EndyKwon

interesting, i'm also running hankooks k110 v12. i've gotten more understeer than oversteer in the canyons. i'd say the only time i'd actually end up with oversteer is when i feel like whipping the car around a 90º turn. i've learned my lesson, been there/done that, i don't really do that anymore after i bounced by stock rims on the curb.

whats your setup? i'm currently running 305/25/20R and 255/30/20F. It's more show than performance (theres a reason why I don't have them fancy ultra-lights or te37s), but it still gets the job done.

I know that hankooks are known to have soft sidewalls, so i believe thats whats causing the understeer. yet, i think i managed to remedy that issue (okay, maybe a not at all) by running 25-profile/30-profile rubber bands.

When the tires were really warmed up on the track I would get some understeer but it would usually end up switching to over-steer at the end of the turn.

My rears are 295/25/19R and fronts are 275/30/19F I believe (going by memory).

I ended up getting some damage when I went off the track at chuckwalla valley because I got oversteer in a section I wasn't expecting it (I can usually deal with it if I am expecting it). Initial counter steer timing was fine but I panicked a little and let off the gas which totally screwed me over. Lesson learned there =P With FR letting off the gas when your getting over-steer is a very bad idea =P

EDIT: This *of course* is with VDC turned off. I would think VDC on would pretty much prevent over-steer (in most situations) and all you would ever get is understeer.

Nailzs · 05-08-2013, 06:22 AM

Let a couple of pounds of air out of the back tires and see if that changes anything.

m4a1mustang · 05-08-2013, 07:23 AM

The Z has enough power to oversteer on exit.

EndyKwon, your extreme stagger is why you feel the under steer, not soft sidewalls. 255/305 is a huge amount of stagger on a front heavy car.

shadoquad · 05-08-2013, 07:37 AM

Staggered tires, a bit more weight in the nose, but oversteering at the apex saved me numerous times in my z

UNKNOWN_370 · 05-08-2013, 08:41 AM

Quote:

Originally Posted by JohnsZ

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.

Did you have VDC ON? VDC ON increases understeer a little going into high speed turns. If so? Try the same turn, under safe conditions with VDC OFF. From there assess the differences and mod accordingly.
My mods are Swifts, eibach alignment and sway kit. It helps understeer a lot. But i feel i can use better damping settings to increase control. So either Koni yellow, KWv3 or JIC Magic FLT2 will go on my car next if i can find them.. Had them on my G and they were awesome. Not sure which way to go when i do? That will have to wait till fall though. (house hunting)

m4a1mustang · 05-08-2013, 09:20 AM

Dampers and tires are really the best thing you can do. Sways are nice but are more normally reserved for fine tuning once you've got your damping where you want it. Even just a switch to Konis will be a huge improvement over stock.

Since you already have Swifts and it seems like you DD your Z, I'd just get the Konis. Most bang for your buck at this point.

Jsolo · 05-08-2013, 11:29 AM

Quote:

Originally Posted by m4a1mustang

They may feel sharper, but the PSS will run laps around them.

How so? Please elaborate.

Just how bad is the steering response on the PSS's? I was thinking of going with stock sizes on the G when tires are needed (probably end of this year or next spring). Stock sizes are 225/50/18 front, 245/45/18 rear. Over on the G forum, folks are saying the contact patch of the pss is flatter than that of the re050a's which, while the pss has softer sidewalls, does not necessarily reduce steering response or sharpness.

m4a1mustang · 05-08-2013, 11:37 AM

Quote:

Originally Posted by Jsolo

How so? Please elaborate.

Just how bad is the steering response on the PSS's? I was thinking of going with stock sizes on the G when tires are needed (probably end of this year or next spring). Stock sizes are 225/50/18 front, 245/50/18 rear. Over on the G forum, folks are saying the contact patch of the pss is flatter than that of the re050a's which, while the pss has softer sidewalls, does not necessarily reduce steering response or sharpness.

Steering response is still very good (in my experience). It does seem a little more muted than tires like the RE050A and PZero, but it offers a lot more grip.

I think more often than not a lot of the criticism about the lack of response is more related to going from worn tires to full tread. You could go from a worn RE050A to a new RE050A and feel less responsive steering because you've now got full tread to squirm about.

Jsolo · 05-08-2013, 11:45 AM

^^Thanks. By the time I'm ready to buy there will hopefully be more feedback (in stock sizes). The other tire I was thinking of was the potenza s-04.

05-07-2013, 03:39 PM	#17 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	Yes I swear by PSS. Can't wait to wear my Potenzas out. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

05-07-2013, 03:45 PM	#19 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	They may feel sharper, but the PSS will run laps around them. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

05-08-2013, 07:23 AM	#24 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	The Z has enough power to oversteer on exit. EndyKwon, your extreme stagger is why you feel the under steer, not soft sidewalls. 255/305 is a huge amount of stagger on a front heavy car. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

05-08-2013, 09:20 AM	#27 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6962	Dampers and tires are really the best thing you can do. Sways are nice but are more normally reserved for fine tuning once you've got your damping where you want it. Even just a switch to Konis will be a huge improvement over stock. Since you already have Swifts and it seems like you DD your Z, I'd just get the Konis. Most bang for your buck at this point. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

05-08-2013, 11:45 AM	#30 (permalink)
Jsolo Track Member Join Date: Dec 2011 Location: chicago Posts: 783 Drives: '12 G37 6MT Rep Power: 14	^^Thanks. By the time I'm ready to buy there will hopefully be more feedback (in stock sizes). The other tire I was thinking of was the potenza s-04. m4a1mustang likes this. __________________ G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring For sale links

05-07-2013, 03:38 PM	#16 (permalink)
JungleZ Banned Join Date: Aug 2012 Location: orange county,ca Posts: 652 Drives: leased base z... Rep Power: 0	im not gonna lie i love the PSS, they are even good in the rain for me. Its the same as dry more or less

05-07-2013, 03:44 PM	#18 (permalink)
JohnsZ Enthusiast Member Join Date: Mar 2011 Location: Connecticut Posts: 374 Drives: '09 370Z Tour CY M6 Rep Power: 14	Yes they are very good in the rain as I drove mine all winter long but I have to admit, the dry handling of the Potenza's was sharper and I'm not sure I would get the PSS again.

05-08-2013, 04:38 AM	#20 (permalink)
houkouonchi Enthusiast Member Join Date: Jun 2010 Location: Ontario, California Posts: 440 Drives: '14 GT-R '10 M6 370z Rep Power: 15	My hankook's are also a softer tire but if anything I would have to say I get oversteer a lot more than understeer when pushing the card hard.

05-08-2013, 06:22 AM	#23 (permalink)
Nailzs Enthusiast Member Join Date: Aug 2012 Location: Florida Posts: 395 Drives: 13 370Z 7at Sp Tour Rep Power: 13	Let a couple of pounds of air out of the back tires and see if that changes anything.

05-08-2013, 07:37 AM	#25 (permalink)
shadoquad A True Z Fanatic Join Date: Apr 2010 Location: . Posts: 42,608 Drives: . Rep Power: 3886	Staggered tires, a bit more weight in the nose, but oversteering at the apex saved me numerous times in my z

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Will Going F.I cause a lot of understeer?	Z370Z011	Track / Autocross / Drifting / Dragstrip	4	04-30-2013 04:31 AM
Understeer	mdxj	Track / Autocross / Drifting / Dragstrip	34	07-08-2012 09:16 PM
more understeer with aftermarket tires?	Pharmacist	Nissan 370Z General Discussions	4	06-18-2011 12:08 AM
too much understeer now!	vortrex	Brakes & Suspension	50	12-08-2010 02:05 AM
Can I fix understeer without killing ride quality?	gozfast	Brakes & Suspension	2	08-06-2010 09:04 AM