Jumping, while cornering
Thread Starter
Driver School Candidate
Joined: Oct 2011
Posts: 49
Likes: 24
From: S. Florida
Jumping, while cornering
The other day, I saw a very cute girl driving an audi and of course wanted to impress her with some aggressive driving. 
we were both at a stop light turning left, she on the inside me on the outside. I put the car in s+ and went halfway through the turn the car started jumping from the front end. It could have been a bump int he road but it made me nervous. Any oen else have a similar issue? It also seems like with the 19's I get some running once in a while.
we were both at a stop light turning left, she on the inside me on the outside. I put the car in s+ and went halfway through the turn the car started jumping from the front end. It could have been a bump int he road but it made me nervous. Any oen else have a similar issue? It also seems like with the 19's I get some running once in a while.
Lexus Champion
Joined: Nov 2014
Posts: 13,614
Likes: 2,918
From: Texas
The other day, I saw a very cute girl driving an audi and of course wanted to impress her with some aggressive driving.
we were both at a stop light turning left, she on the inside me on the outside. I put the car in s+ and went halfway through the turn the car started jumping from the front end. It could have been a bump in the road but it made me nervous. Any oen else have a similar issue? It also seems like with the 19's I get some running once in a while.
we were both at a stop light turning left, she on the inside me on the outside. I put the car in s+ and went halfway through the turn the car started jumping from the front end. It could have been a bump in the road but it made me nervous. Any oen else have a similar issue? It also seems like with the 19's I get some running once in a while.
The cute girl in the Audi made you nervous and she beat you turning left at a stoplight. Now you're trying to blame her beating you on a bump in the road. 
Did she stop to find out what happened to you, or did the cute girl drive away in victory? 
Do you have any idea if you impressed her? 
Lexus Test Driver
Joined: Feb 2013
Posts: 5,822
Likes: 1,065
From: California
So, let me see if I got this right. The cute girl in the Audi made you nervous and she beat you turning left at a stoplight. Now you're trying to blame her beating you on a bump in the road. Did she stop to find out what happened to you, or did the cute girl drive away in victory? Do you have any idea if you impressed her?
The cute girl in the Audi made you nervous and she beat you turning left at a stoplight. Now you're trying to blame her beating you on a bump in the road. Did she stop to find out what happened to you, or did the cute girl drive away in victory? Do you have any idea if you impressed her? 
No jumping needed.
Lead Lap
Joined: Feb 2012
Posts: 615
Likes: 6
From: TX
I've noticed the front end of the GS jump when taking a corner aggressively too. Almost like the car isn't turning fast enough to keep up with the rear wheels pushing it.
First thought was that maybe my front tires need to be replaced, but they have really good tread on them - and the tread is even. This is on dry paved road, so I didn't expect this to happen.
First thought was that maybe my front tires need to be replaced, but they have really good tread on them - and the tread is even. This is on dry paved road, so I didn't expect this to happen.
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Lexus Champion
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Lexus Champion
Joined: Nov 2014
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From: Texas
The OP should read about Ackermann Steering Geometry and also about Scrub Radius and Squirm.
When a RWD car with a tight suspension and wide tires makes a small radius turn at a slow speed, one of the front tires can slip, jump or jerk.
When a RWD car with a tight suspension and wide tires makes a small radius turn at a slow speed, one of the front tires can slip, jump or jerk.
Lexus Test Driver
Joined: Aug 2013
Posts: 1,295
Likes: 15
From: Texas
If it was under steering, you were in the wrong gear, turning too sharply, or not feeding it enough gas. RWD cars tend to oversteer if anything.
Still, chasing a girl in an audi? You can do better bro.
Still, chasing a girl in an audi? You can do better bro.
Instructor
Joined: Sep 2013
Posts: 1,024
Likes: 41
From: Tennessee
My car too has this dreaded hop at mild speeds during turns. Only when i sport+ mode and only while making a left turn with moderate pedal travel.
This problem does not occur when I take my car to the race track for a track day. When on the gas heavy or full throttle while turning left it does not exibit this problem at all. I have no problem drifting this car on the track.
But because this car has low torque its quite hard to maintain a long consistent drift. All my other RWD cars in the pass does not have this problem, that the GS has on sharp left turns with moderate throttle.
This problem does not occur when I take my car to the race track for a track day. When on the gas heavy or full throttle while turning left it does not exibit this problem at all. I have no problem drifting this car on the track.
But because this car has low torque its quite hard to maintain a long consistent drift. All my other RWD cars in the pass does not have this problem, that the GS has on sharp left turns with moderate throttle.
Driver School Candidate
Joined: Apr 2015
Posts: 24
Likes: 0
From: Maryland
All cars will understeer depending on how they're driven. It's just possible to get RWD cars to oversteer... very hard for an FWD or even AWD to oversteer. I'm willing to bet that the OP went through the turn too slowly but was attempting to turn too sharply. Hence, understeer. A little bit of throttle would solve that problem nicely. 