Ho can I prevent "crabwalk"??
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Ho can I prevent "crabwalk"??
the car feels very unstable going around corners at anything over 50 mph and hitting a bump. To the point where I need to keep both hands on the wheel. I've raced other cars for years w/ decent suspensions and never noticed this. Is there ANYTHING I can do short of getting coil overs? This feels very unsafe to me
Thanks
dave
Thanks
dave
Team Owner
Joined: Apr 2001
Posts: 36,453
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From: Overwhelmed as one would be, placed in my position.... DFW, TX
St. Jude Donor '05
Re: Ho can I prevent "crabwalk"?? (TT_Vert)
Are you still running the stock runflats? That's the first thing I would change. :yesnod: :yesnod:
Tech Contributor
Joined: May 2003
Posts: 7,035
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From: North Augusta, SC
Re: Ho can I prevent "crabwalk"?? (TT_Vert)
Most people on this forum call that "wheel hop". Get ready, you're going to get bombarded with "Loose the runflats!". Try lowering the air pressure in your tires first, 30PSI cold is where most recommend, but lowering it a few pounds will help IMHO.
:cheers:
:cheers:
Safety Car
Joined: Feb 2003
Posts: 3,865
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From: Chicago il
Re: Ho can I prevent "crabwalk"?? (markcz)
Actually, wheel hop is the violent shaking of the rear end during heavy accelation. What he is refering to is bumpstreet. run flats will help, and so will lowering you rpms, but you will sacrifice control. If it is totaly out of hand you may meed new shocks, try blistens or 04 ZO6 shocks
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Ho can I prevent "crabwalk"?? (Monster231)
the car has 20k miles on it so I dont know if the shocks would be shot yet. it handles great otherwise. I do have the runflats w/ about 32 psi HOT in them so ill lower the pressure some. I know what wheel hop is, and it is NOT this, its the entire car becoming unsettled in a corner. it isnt RPM related because i was not accelerating and I think i was in 5th gear at 55-60 when this happened. It's done it many times now, so it's somewhat bothersome.
Dave
Dave
Safety Car
Joined: Sep 2003
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From: Cape Coral FL
Re: Ho can I prevent "crabwalk"?? (TT_Vert)
I know what you are talking about. I hit a bump while going around a curve on the highway at about 60mph and went about 20 degrees sideways. Not good. I had runflats and Z51 shocks at the time. I since went with Z06 chromies in Z06 sizes but 18's up front and put in QA1 HAL adjustable shocks and the ride is now awsome and no more losing control in corners even with bumpy roads. The runflats are very stiff and don't flex with pavement irregularities. The nice thing about the adjustable shocks is I can dial in to what kind of driving I'm about to do. I usually have them set at 5 for street/highway driving. Then around 3 rear/4-5 front for drag and 6-8 all around for autocross/road course. The car rides like it is on rails now and feels like it is stuck to the road. The first thing I would do is get a more forgiving tire, then a more responsive shock. :)
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
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From: Streamwood illinois
Re: Ho can I prevent "crabwalk"?? (ArKay99)
Yes i have the FE1 base suspension. I cannot afford expensive shocks so maybe ill go w/ the 04 z06 shocks if they'll fix the problem
dave
dave
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Burning Brakes
Joined: Aug 2003
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Re: Ho can I prevent "crabwalk"?? (ArKay99)
I know what you are talking about. I hit a bump while going around a curve on the highway at about 60mph and went about 20 degrees sideways. Not good. I had runflats and Z51 shocks at the time. I since went with Z06 chromies in Z06 sizes but 18's up front and put in QA1 HAL adjustable shocks and the ride is now awsome and no more losing control in corners even with bumpy roads. The runflats are very stiff and don't flex with pavement irregularities. The nice thing about the adjustable shocks is I can dial in to what kind of driving I'm about to do. I usually have them set at 5 for street/highway driving. Then around 3 rear/4-5 front for drag and 6-8 all around for autocross/road course. The car rides like it is on rails now and feels like it is stuck to the road. The first thing I would do is get a more forgiving tire, then a more responsive shock. :)
Team Owner
Joined: Jan 2003
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From: Freestate Corvette Club! Elkridge, MD
St. Jude Donor '17
Re: Ho can I prevent "crabwalk"?? (TT_Vert)
Yes i have the FE1 base suspension. I cannot afford expensive shocks so maybe ill go w/ the 04 z06 shocks if they'll fix the problem
dave
dave
Race Director
Joined: May 2000
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Re: Ho can I prevent "crabwalk"?? (TT_Vert)
the car feels very unstable going around corners at anything over 50 mph and hitting a bump. To the point where I need to keep both hands on the wheel...
If the bump is not that large, how many miles on the shocks and the tires? When's the last time an alignment was done?
All of those are factors. More than 30,000 miles on the shocks, or 12,000 miles on an alignment, I would look at those first. Replacing the run flats will also help.
Heel & Toe
Joined: Jan 2002
Posts: 18
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Re: Ho can I prevent "crabwalk"?? (EHS)
Can't tell what year you have, but if earlier than 2002 you might replace those plastic end links with the later model versions; I did, and the oricinals were worn out. A pretty cheap fix.
Drifting
Joined: Jul 2002
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From: Spring Tx
Re: Ho can I prevent "crabwalk"?? (pdd000)
The runflats were horrible, with lots of low speed bumpsteer, even with the Z-51 suspension.I can only imagine how bad it would be with the base suspension...
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Re: Ho can I prevent "crabwalk"?? (lost)
Its the runflats.....its time for new tires :yesnod:
[Modified by pewter99, 5:12 PM 3/30/2004]
[Modified by pewter99, 5:12 PM 3/30/2004]
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Re: Ho can I prevent "crabwalk"?? (TT_Vert)
the tires still have over 1/2 their tread left, you really think I should just dump em??
Dave
Dave