Oversteer during hard acceleration
Thread Starter
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Joined: Dec 2015
Posts: 53
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Oversteer during hard acceleration
Hi,
First time posting, so not sure if I am doing this correctly?
Problem: under hard acceleration (80 percent of full throttle) car is starting to fishtail and I have to back off throttle to regain straight line direction.
-2013 Grand Sport
-6 speed Auto trans
-tires at 30 psi cold pressure
-8000 miles on Factory Goodyear Eagle F1 Supercar EMT- worn to 4/32nds
-47 Degrees ambient temperature, dry road conditions
Is this due to:
Summer tires starting to harden in colder temps?
At what point should active handling or traction control be helping my problem? And what will I see (on the dash) or experience once these do kick in?
Any other ideas of what is going on?
Thanks
First time posting, so not sure if I am doing this correctly?
Problem: under hard acceleration (80 percent of full throttle) car is starting to fishtail and I have to back off throttle to regain straight line direction.
-2013 Grand Sport
-6 speed Auto trans
-tires at 30 psi cold pressure
-8000 miles on Factory Goodyear Eagle F1 Supercar EMT- worn to 4/32nds
-47 Degrees ambient temperature, dry road conditions
Is this due to:
Summer tires starting to harden in colder temps?
At what point should active handling or traction control be helping my problem? And what will I see (on the dash) or experience once these do kick in?
Any other ideas of what is going on?
Thanks
Burning Brakes
Joined: Apr 2008
Posts: 1,031
Likes: 57
From: Brentwood(Contra Costa County) CA
Dkoch:
In answer to your question: sheety tires in cold weather do not stick to the road well. Sudden input of full power in cold weather will cause them to break loose. Ease into addition of power and be mindful that at high rpm in the lower gears under full power that the tires can break loose also..been there done that even under warm temps. When they break traction, it is sudden and without noise. Respect the power you have and don't be shutting off the traction control till you know what the car is going to do under all circumstances.
In answer to your question: sheety tires in cold weather do not stick to the road well. Sudden input of full power in cold weather will cause them to break loose. Ease into addition of power and be mindful that at high rpm in the lower gears under full power that the tires can break loose also..been there done that even under warm temps. When they break traction, it is sudden and without noise. Respect the power you have and don't be shutting off the traction control till you know what the car is going to do under all circumstances.
Last edited by cheetah45; Dec 27, 2015 at 02:00 AM.
Racer
Joined: Nov 2015
Posts: 386
Likes: 19
From: Atlanta
Semi-low tire tread + cold tires + 80% accel on a 6.2L torquey V8 motor will do that.
The easiest way to solve the problem would be to work on your throttle control. Or shift to a higher gear.
You could buy your way out with an all seasons tire.
The easiest way to solve the problem would be to work on your throttle control. Or shift to a higher gear.
You could buy your way out with an all seasons tire.
Last edited by Synacks; Dec 27, 2015 at 05:21 PM.
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Thread Starter
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Joined: Dec 2015
Posts: 53
Likes: 3
I did leave traction and active handling on....
That is the other question: at what point would that active handling kick in?? I was getting out of my comfort zone with the amount of oversteer, yet did not seem to notice the cars system correcting me....wish I could test it on a safe course to see what the engagement of active handling feels like.
That is the other question: at what point would that active handling kick in?? I was getting out of my comfort zone with the amount of oversteer, yet did not seem to notice the cars system correcting me....wish I could test it on a safe course to see what the engagement of active handling feels like.
Racer
Joined: Nov 2015
Posts: 386
Likes: 19
From: Atlanta
I did leave traction and active handling on....
That is the other question: at what point would that active handling kick in?? I was getting out of my comfort zone with the amount of oversteer, yet did not seem to notice the cars system correcting me....wish I could test it on a safe course to see what the engagement of active handling feels like.
That is the other question: at what point would that active handling kick in?? I was getting out of my comfort zone with the amount of oversteer, yet did not seem to notice the cars system correcting me....wish I could test it on a safe course to see what the engagement of active handling feels like.
Thread Starter
Advanced
Joined: Dec 2015
Posts: 53
Likes: 3
And you would think traction control would stop those tires from spinning much earlier! I need a track to get to know this thing better.
Burning Brakes
Joined: Apr 2008
Posts: 1,031
Likes: 57
From: Brentwood(Contra Costa County) CA
You are not a wimp if you back off. Too many heroes have totaled their cars and killed themselves and their passengers by not being a wimp. When the tires let loose, it is sudden and without noise. In the cold, you will get yourself in trouble much quicker and at lower limits than in the summer time and it will take a lot longer for the tires to rehook up when you do back off. Tread lightly when driving these cars in cold temps.
Racer
Joined: Nov 2014
Posts: 418
Likes: 34
From: Kissimmee Florida
St. Jude Donor '16
They had two choices either have the traction control kick in early.Or have it kick in later.
I for one am glad they made it later.But it does take some getting used too.
Uncomfortable?? lift or don't push it as hard next time.No point in wrecking just because you arnt used to it yet.
I for one am glad they made it later.But it does take some getting used too.
Uncomfortable?? lift or don't push it as hard next time.No point in wrecking just because you arnt used to it yet.
Last edited by Warship2k15; Dec 27, 2015 at 11:03 PM.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
When active handling kicks in, you'll know it. Especially if you're getting sideways.
Find a big open parking lot and learn how to handle it. I'd suggest either a helmet or open the window, in case the correction is on the violent side.
Find a big open parking lot and learn how to handle it. I'd suggest either a helmet or open the window, in case the correction is on the violent side.
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Joined: Dec 2015
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Cannot say how grateful I am for all of this great technical and practical knowledge you have. I was pretty scared, as I was going PERFECTLY straight when this happened. Hope to get to a safe place and feel this kick in.
Thread Starter
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Joined: Dec 2015
Posts: 53
Likes: 3
Thread Starter
Advanced
Joined: Dec 2015
Posts: 53
Likes: 3
You are not a wimp if you back off. Too many heroes have totaled their cars and killed themselves and their passengers by not being a wimp. When the tires let loose, it is sudden and without noise. In the cold, you will get yourself in trouble much quicker and at lower limits than in the summer time and it will take a lot longer for the tires to rehook up when you do back off. Tread lightly when driving these cars in cold temps.