Oversteer in right hand turns

JWillis72 · 04-01-2014, 01:42 PM

I spent the weekend at Sebring and had a very scary moment where I about ate a wall because of oversteer. It was in turn 16 a right hand turn at around 60-70 mph. The car suspension is all stock with BFG G-Force comp 2 tires. I know down force would help but I'm looking for suspension or sway bar recommendations that would help with understeer? My instinct wants to change it all but this is the first car I have tracked and I don't want my lack of knowledge to make the oversteer worse.

Chuck33079 · 04-01-2014, 01:44 PM

What's your alignment look like? Start with the low hanging fruit.

JWillis72 · 04-01-2014, 02:55 PM

I had it done not long ago, it's within factory specs.

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Chuck33079 · 04-01-2014, 02:57 PM

That covers a lot of ground, unfortunately. How hot were your tires? Did it only occur on right turns?

JWillis72 · 04-01-2014, 03:00 PM

Yes but most of the hard turns are right hand at Sebring. I only lost it once bad but it tried to come around several times.

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Chuck33079 · 04-01-2014, 03:02 PM

I'd have someone take a look at rear toe just to rule that out.

Also, are you on the stock VLSD?

JWillis72 · 04-01-2014, 03:02 PM

Yes whatever comes in a touring without the sport package.

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JWillis72 · 04-01-2014, 03:03 PM

I will have the toe checked out.

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falconfixer · 04-01-2014, 03:05 PM

Quote:

Originally Posted by JWillis72

Yes whatever comes in a touring without the sport package.

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No VLSD

Chuck33079 · 04-01-2014, 03:05 PM

Quote:

Originally Posted by JWillis72

Yes whatever comes in a touring without the sport package.

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Ok, then you've got an open diff in the back. Without the sport package, you don't get a lsd. That's no bueno since you've got a lot more power than stock.

Is the snap oversteer new, or has it happened every time you've tracked it? Is there a chance it could be related to throttle control? Sorry for all the questions, but your question is kind of broad. It's like trying to diagnose a noise over the internet.

JWillis72 · 04-01-2014, 03:06 PM

No? I didn't realize that.

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Zauskycop · 04-01-2014, 03:07 PM

Is the oversteer happening under braking, or mid turn, or under acceleration?

Tracy Ramsey

JWillis72 · 04-01-2014, 03:08 PM

It's new but this was the first time on the track boosted. I'm sure I'm part of the problem, the extra HP was a handful!

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Chuck33079 · 04-01-2014, 03:08 PM

Quote:

Originally Posted by JWillis72

No? I didn't realize that.

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Nope. No sport pack, no LSD. That would be the next thing to change if I was in your shoes.

Quote:

Originally Posted by Zauskycop

Is the oversteer happening under braking, or mid turn, or under acceleration?

Tracy Ramsey

Another good question.

JWillis72 · 04-01-2014, 03:09 PM

Under acceleration and it happened fast! I came within a foot of painting a wall yellow!

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04-01-2014, 01:42 PM	#1 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	Oversteer in right hand turns I spent the weekend at Sebring and had a very scary moment where I about ate a wall because of oversteer. It was in turn 16 a right hand turn at around 60-70 mph. The car suspension is all stock with BFG G-Force comp 2 tires. I know down force would help but I'm looking for suspension or sway bar recommendations that would help with understeer? My instinct wants to change it all but this is the first car I have tracked and I don't want my lack of knowledge to make the oversteer worse.

04-01-2014, 01:44 PM	#2 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	What's your alignment look like? Start with the low hanging fruit. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

04-01-2014, 02:57 PM	#4 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	That covers a lot of ground, unfortunately. How hot were your tires? Did it only occur on right turns? cv129 likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

04-01-2014, 03:02 PM	#6 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	I'd have someone take a look at rear toe just to rule that out. Also, are you on the stock VLSD? __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

04-01-2014, 03:07 PM	#12 (permalink)
Zauskycop Base Member Join Date: May 2011 Location: Hinckley IL Posts: 228 Drives: 2012 370Z, '16 Miata Rep Power: 13	Is the oversteer happening under braking, or mid turn, or under acceleration? Tracy Ramsey kenchan and osbornsm like this.

04-01-2014, 02:55 PM	#3 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	I had it done not long ago, it's within factory specs. Sent from my iPhone using Tapatalk

04-01-2014, 03:00 PM	#5 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	Yes but most of the hard turns are right hand at Sebring. I only lost it once bad but it tried to come around several times. Sent from my iPhone using Tapatalk

04-01-2014, 03:02 PM	#7 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	Yes whatever comes in a touring without the sport package. Sent from my iPhone using Tapatalk

04-01-2014, 03:03 PM	#8 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	I will have the toe checked out. Sent from my iPhone using Tapatalk

04-01-2014, 03:06 PM	#11 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	No? I didn't realize that. Sent from my iPhone using Tapatalk

04-01-2014, 03:08 PM	#13 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	It's new but this was the first time on the track boosted. I'm sure I'm part of the problem, the extra HP was a handful! Sent from my iPhone using Tapatalk

04-01-2014, 03:09 PM	#15 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	Under acceleration and it happened fast! I came within a foot of painting a wall yellow! Sent from my iPhone using Tapatalk

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