Oversteer during overtaking - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Roarke · 10-07-2014, 11:20 AM

Hey guys,

I had some strange behaviour which never happened to me with other cars. I would like to explain it, but my English is far from perfect, so hope Ill do it right

First,m I know that it was my fault and it was a dangerous maneuver ;( So please dont punish me, my wife already did it

Basically, I was driving on highway around 140Km and a little bit in hurry ( i know, whole accident was because of this) .. So I was in left lane, behind slow car and very close (because he didnt want to return to right lane).

When he began return back to right lane, I begin accelerate (slightly). When I was on the side with him (something like my nose in his center) , my car oversteer to the left. I was really surprised, crash barrier was so close, car oversteered to the left, my wife screaming. So I stopped accelerate and brake a little bit.. and luckily get grip again. Anyway, nothing what I would like to experience again.

I assume, that because I accelerated, I had more grip on rear wheel and wind from second car break grip for front wheel and car begin skid...

do you have any experience with something like this ?

Best
Roarke

jvincent · 10-07-2014, 11:40 AM

When you say the car "oversteered to the left", do you mean it started to drift to the left?

Oversteer usually means the back of the car turns faster than the front. It sounds like you were going is a straight line and the car just started to drift.

Roarke · 10-07-2014, 11:48 AM

Quote:

Originally Posted by jvincent

When you say the car "oversteered to the left", do you mean it started to drift to the left?

Oversteer usually means the back of the car turns faster than the front. It sounds like you were going is a straight line and the car just started to drift.

Its hard to explain with my English. The car didnt move to the left without changing direction. it begin turning to the left and it was oversteer IMHO.. the back definitely wanted to overtaking front ...

AdrianG · 10-07-2014, 12:18 PM

You probably hit some oil on the road or something to make you lose traction. At 140+ km/h you would have to at least try and induce a slide in regular conditions.

- AdrianG

aznatama · 10-07-2014, 12:27 PM

So let me get this straight... you were tailgating, the car moved over to the right, and you sped up going straight, then the car felt like it turned to the left?

Probably a combination of wind turbulence and some slight loss of traction due to road conditions, or you just hit a dip or tracked a rut in the road that you didn't see.

You don't "oversteer" going in a straight line, unless you were cornering and the rear slid out.

Roarke · 10-07-2014, 02:32 PM

Quote:

Originally Posted by aznatama

So let me get this straight... you were tailgating, the car moved over to the right, and you sped up going straight, then the car felt like it turned to the left

This, except it didnt feel, but really turn left (without feedback on steering wheel)

jvincent · 10-07-2014, 03:16 PM

If you weren't moving the wheel then the only things that could have caused you to move that much would be something on the road (water or oil) or a dip or bump in the road that cause the car to bounce which made it seem like it turned.

140 KMH isn't fast enough to have an aero induced lack of traction.

unlimited86 · 10-07-2014, 03:22 PM

Quote:

Originally Posted by Roarke

This, except it didnt feel, but really turn left (without feedback on steering wheel)

Happen to me in the rain before..thats rwd for you. You could of hit an oil patch or something and slightly broke traction in the rear, just ease ease off gas a little and you should be fine.

paulca · 10-07-2014, 03:49 PM

Did you hit a sharp bump in the road?

ZionsWrath · 10-07-2014, 04:04 PM

There was a skunk in the road and since the opposite lane was clear I decided to dodge it. The TC kicked in hard, not sure why I wasn't THAT aggressive lol.

But since you didn't lane change I don't know what happened

paulca · 10-07-2014, 04:08 PM

Why do I have a vision of you in court saying,

"There was a skunk in the road and ....."

"Your honor...."

ZionsWrath · 10-07-2014, 04:12 PM

wtf it was 6 am no one in sight either direction, just mr stinky

Roarke · 10-07-2014, 04:20 PM

No bump or something.. I still think that it was because aerodynamic wind from second car...

Anyway thanks for input

ashtray · 10-07-2014, 04:41 PM

Are your rear tires worn out?

10-07-2014, 12:27 PM	#5
aznatama Senior Member Join Date: May 2014 Drives: 2014 BRZ MT (Sold); 2006 V70R Location: Fairfax Posts: 873 Thanks: 10 Thanked 186 Times in 150 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	So let me get this straight... you were tailgating, the car moved over to the right, and you sped up going straight, then the car felt like it turned to the left? Probably a combination of wind turbulence and some slight loss of traction due to road conditions, or you just hit a dip or tracked a rut in the road that you didn't see. You don't "oversteer" going in a straight line, unless you were cornering and the rear slid out. __________________ '14 BRZ LTD MT DGM

10-07-2014, 03:49 PM	#9
paulca Senior Member Join Date: May 2014 Drives: Toyota GT86 Coupe Red (UK) Location: United Kingdom Posts: 554 Thanks: 20 Thanked 291 Times in 171 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Did you hit a sharp bump in the road? __________________ Trunk = Boot \| Hood = Bonnet \| Sidewalk = Pavement \| Transmission = Gearbox \| Stick/shifter = Gear knob/stick \| E-brake = handbrake \| Windshield = Windscreen \| Turn signal = Indicator

10-07-2014, 04:04 PM	#10
ZionsWrath Thanks Join Date: Apr 2013 Drives: BRZ Location: NY Posts: 4,163 Thanks: 5,989 Thanked 3,100 Times in 1,498 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	There was a skunk in the road and since the opposite lane was clear I decided to dodge it. The TC kicked in hard, not sure why I wasn't THAT aggressive lol. But since you didn't lane change I don't know what happened __________________

10-07-2014, 04:08 PM	#11
paulca Senior Member Join Date: May 2014 Drives: Toyota GT86 Coupe Red (UK) Location: United Kingdom Posts: 554 Thanks: 20 Thanked 291 Times in 171 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Why do I have a vision of you in court saying, "There was a skunk in the road and ....." "Your honor...." __________________ Trunk = Boot \| Hood = Bonnet \| Sidewalk = Pavement \| Transmission = Gearbox \| Stick/shifter = Gear knob/stick \| E-brake = handbrake \| Windshield = Windscreen \| Turn signal = Indicator

10-07-2014, 04:12 PM	#12
ZionsWrath Thanks Join Date: Apr 2013 Drives: BRZ Location: NY Posts: 4,163 Thanks: 5,989 Thanked 3,100 Times in 1,498 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	wtf it was 6 am no one in sight either direction, just mr stinky __________________

10-07-2014, 11:40 AM	#2
jvincent Senior Member Join Date: Sep 2013 Drives: 2022 WRB BRZ Sport-Tech Location: Ottawa, Canada Posts: 1,746 Thanks: 131 Thanked 1,411 Times in 715 Posts Mentioned: 25 Post(s) Tagged: 2 Thread(s)	When you say the car "oversteered to the left", do you mean it started to drift to the left? Oversteer usually means the back of the car turns faster than the front. It sounds like you were going is a straight line and the car just started to drift.

10-07-2014, 12:18 PM	#4
AdrianG Generally Well Liked Join Date: Aug 2013 Drives: '08 STi Hatch, '11 Outback 3.6R Location: Ontario Posts: 419 Thanks: 43 Thanked 197 Times in 125 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	You probably hit some oil on the road or something to make you lose traction. At 140+ km/h you would have to at least try and induce a slide in regular conditions. - AdrianG

10-07-2014, 03:16 PM	#7
jvincent Senior Member Join Date: Sep 2013 Drives: 2022 WRB BRZ Sport-Tech Location: Ottawa, Canada Posts: 1,746 Thanks: 131 Thanked 1,411 Times in 715 Posts Mentioned: 25 Post(s) Tagged: 2 Thread(s)	If you weren't moving the wheel then the only things that could have caused you to move that much would be something on the road (water or oil) or a dip or bump in the road that cause the car to bounce which made it seem like it turned. 140 KMH isn't fast enough to have an aero induced lack of traction.

10-07-2014, 04:41 PM	#14
ashtray As Seen On The Internet Join Date: Apr 2011 Drives: 2003 WRX, 2013 BRZ, 442 Location: SoCal Posts: 852 Thanks: 23 Thanked 251 Times in 159 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	Are your rear tires worn out?

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