Highway handling
Thread Starter
Cruising
Joined: Jul 2006
Posts: 10
Likes: 0
From: Westford VT
Highway handling
I noticed the other day while driving on the interstate that my coupe will tend to dart back and forth across the lane,I don't know if it's catching a groove or what but I have to constantly correct for this. The front wheels are 9.5 in. the same as the rear and I'm wondering if this could be causing my problem? the car should have 8.5 in. wheels in front. Any ideas?
Burning Brakes
Joined: Sep 2005
Posts: 826
Likes: 0
From: Millbury MA
Originally Posted by 65Z01
Check:
-inflation
-tire wear
-alignment
-inflation
-tire wear
-alignment
Thread Starter
Cruising
Joined: Jul 2006
Posts: 10
Likes: 0
From: Westford VT
Thanks,my tires are new, and the alignment was checked when they were put on. The roads up here pretty much suck so it's hard to tell if it's the car or the road. I noticed that while changing lanes as I drove over the painted lines on the road the car fet like it was floating and while in the lane it wants to dart back and forth.
Pro
Joined: Jul 2005
Posts: 707
Likes: 0
From: Fuquay Varina North Carolina
Originally Posted by Perik
I noticed the other day while driving on the interstate that my coupe will tend to dart back and forth across the lane,I don't know if it's catching a groove or what but I have to constantly correct for this. The front wheels are 9.5 in. the same as the rear and I'm wondering if this could be causing my problem? the car should have 8.5 in. wheels in front. Any ideas?
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Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Originally Posted by 65Z01
Check:
-inflation
-tire wear
-alignment
-inflation
-tire wear
-alignment
This can also be worn front end parts. Have an alignment shop check it. It could be as simple as a caster adjustment.
Race Director
Joined: Aug 2003
Posts: 13,421
Likes: 8
From: Lake Mary Florida
When I had my '93 with the original wheels it didn't do that as much, but with the same alignment after I switched to 9.5's all the way around I noticed it a little more than usual. I had it aligned but honestly they made it worst I think.
I think your alignment just needs a little more tweaking to suppress that behavior.
I think your alignment just needs a little more tweaking to suppress that behavior.
Safety Car
Joined: Aug 2004
Posts: 4,908
Likes: 735
From: Southwest Kansas
2022 Corvette of the Year Finalist -- Unmodified
2021 C6 of the Year Winner - Unmodified
My 94 did that pretty much when I got it (9.5" wheels all around). According to the book, Cor-VETTE specs 1984-1996, the engineers went from 9.5" wheels to 8.5" in the front after 1992 (93-96) to help correct the problem. Z07, ZR1 and Z51 equipped cars still had the 9.5" front wheels.
I had an alignment done and told my alignment guy what the car was doing, he made some change and it is better.
I had an alignment done and told my alignment guy what the car was doing, he made some change and it is better.
Pro
Joined: Oct 2004
Posts: 619
Likes: 1
From: Reno Nv
My 92 has 9.5's and at the correct tire pressure (35) is rock steady. At 32 psi, it does move around a little, BFG tires.
A friend has an 84 with Goodyears. At 32, it's all over the road and at 34 it's fairly steady.
Also, too little toe in will make a car "darty" especially over bumps.
A friend has an 84 with Goodyears. At 32, it's all over the road and at 34 it's fairly steady.
Also, too little toe in will make a car "darty" especially over bumps.
Drifting
Joined: Feb 2006
Posts: 1,263
Likes: 0
From: CV ca
St. Jude Donor '11-'12-'13
Originally Posted by VinceC4
Have the alignment shop check it again..if they follow the specs exactly on a car that has some wear..it will float..they need to dial in a bit more toe in (caster)?..not sure what the tech term is for it.
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Originally Posted by VinceC4
Have the alignment shop check it again..if they follow the specs exactly on a car that has some wear..it will float..they need to dial in a bit more toe in (caster)?..not sure what the tech term is for it.
Pro
Joined: Jul 2005
Posts: 707
Likes: 0
From: Fuquay Varina North Carolina
Originally Posted by BADDUCK
Toe in and caster are two completely different things. Caster is the forward and back inclination of the wheels on a vertical axis. Toe in is pointing the wheels inward or outward on a horizontal plane.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
My 92 has 9.5's and at the correct tire pressure (35) is rock steady.
If still too "darty" have a little more caster dialed in.
