Steering abnormality?
Thread Starter
Instructor
Joined: Mar 2023
Posts: 144
Likes: 142
From: Northern California (San Joaquin Valley)
Steering abnormality?
In a parking lot environment while slow maneuvering when steering fully turned to either left or right I feel a wobble and it feels like a front tire going to fall of... or as if the ground is not even and flat.
But when straight away or halfway turn applied to the steering everything feels rock solid and perfectly aligned.
Is that an abnormality or ????
But when straight away or halfway turn applied to the steering everything feels rock solid and perfectly aligned.
Is that an abnormality or ????
Melting Slicks
Joined: Dec 2017
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From: Central Commiefornia
Also, if it is annoying enough when you're ready for new tires, the effect it is much less pronounced on the AS4 all season tires at the probable cost of some slight marginal performance decrease
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Instructor
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From: Northern California (San Joaquin Valley)
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In a parking lot environment while slow maneuvering when steering fully turned to either left or right I feel a wobble and it feels like a front tire going to fall of... or as if the ground is not even and flat.
But when straight away or halfway turn applied to the steering everything feels rock solid and perfectly aligned.
Is that an abnormality or ????
But when straight away or halfway turn applied to the steering everything feels rock solid and perfectly aligned.
Is that an abnormality or ????
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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From the Owner's Manual:
Tire Chatter/Hop
When driving at slow speeds and in
very tight turns, the vehicle may
have tire chatter/hop. This is normal
and the vehicle does not require
service.
When driving at slow speeds and in
very tight turns, the vehicle may
have tire chatter/hop. This is normal
and the vehicle does not require
service.
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Actually, there is no such thing as "Ackerman effect." (Unfortunately there is a dealer website article that erroneously states this, confusing people.)
Ackerman patented a steering geometry which alleviates the hopping/chattering. Ackerman steering however compromises performance.
The C7 does not have Ackerman steering geometry and thus the tires hop.
Elk is invisible Report Post
Ackerman patented a steering geometry which alleviates the hopping/chattering. Ackerman steering however compromises performance.
The C7 does not have Ackerman steering geometry and thus the tires hop.
Elk is invisible Report Post
Thread Starter
Instructor
Joined: Mar 2023
Posts: 144
Likes: 142
From: Northern California (San Joaquin Valley)
C'mon now Miami... Manual is for the lonely people and as we all know " Real men don't read manuals!!!" 
Seriously I should be reading the manual but after two pages my eyes begin to close and all I want a long nap! So it's more fun to ask friends and learn in person...
Seriously I should be reading the manual but after two pages my eyes begin to close and all I want a long nap! So it's more fun to ask friends and learn in person...
Thread Starter
Instructor
Joined: Mar 2023
Posts: 144
Likes: 142
From: Northern California (San Joaquin Valley)
Actually, there is no such thing as "Ackerman effect." (Unfortunately there is a dealer website article that erroneously states this, confusing people.)
Ackerman patented a steering geometry which alleviates the hopping/chattering. Ackerman steering however compromises performance.
The C7 does not have Ackerman steering geometry and thus the tires hop.
Elk is invisible Report Post
Ackerman patented a steering geometry which alleviates the hopping/chattering. Ackerman steering however compromises performance.
The C7 does not have Ackerman steering geometry and thus the tires hop.
Elk is invisible Report Post
Le Mans Master
Joined: Dec 2000
Posts: 5,348
Likes: 3,319
It is a common misnomer to refer to the hopping of the tires as the "Ackerman effect" when there is only Ackerman steering. All Mr. Ackerman did was to patent a steering geometry which solves the problem. He was not the first to identify the problem, he did not name it, or have anything to do with the underlying physics of the issue. The symptom is a matter of physics.
To call the wheel hopping the Ackerman effect is to name the solution after the problem. It is equivalent to calling a sour stomach the "Tums Effect" because chewing a couple of Tums solves the problem.
Of course, none of this has any impact on tire judder or its solution.
To call the wheel hopping the Ackerman effect is to name the solution after the problem. It is equivalent to calling a sour stomach the "Tums Effect" because chewing a couple of Tums solves the problem.
Of course, none of this has any impact on tire judder or its solution.