Radial Wabble Problem - Page 2

Greg Hill · 01-04-2008, 11:00 AM

Put some snubbers on the front end so the front end can only go down so far. You will be amazed at how much that will help.

Greg

Roger K Fain · 01-15-2009, 11:45 AM

In your description of the problem you left out many of the possible contributing factors. What is happening to the vehicle is the suspension is unloading upon deceleration and finding weak points in the structure or geometry. The radials are a major contributor to the reaction of the suspension, but not the initiater. If you have a four-link suspension, you may have a problem with your wishbone flexing, bending, or just loose in the mounting.Check to ensure that all connecting points of bars are sufficiently secured and not allowed to "wobble", thus keeping the car in a straight line until the suspension collects itself.
Additionally, make sure the front suspension reacts equally in separation and compression and is totally fluid in movement.

mike withers · 01-04-2008, 02:04 PM

I had heard the radials should only be used on automatic cars but I just had to try them on my stick car. Wow! the tire shake was incredible I thought I was in a fuel car. It didn't settle down until I put it into third gear.The announcer at Norwalk said it looked like basketball going down the track More air pressure did not help Two passes were enough for me to see the light. They just do not have enough sidewall. As for your problems I have observed wobbles similar to what you are experiencung on My buddies sperstock hemi car. I do know he has double adjustable shocks front and rear.

tim worner · 01-04-2008, 03:00 PM

We have M/T radials on all 3 of our cars and have no problems. For sure a radial tire will bring out any problems in your suspension and also the track. The only time my car tends to roll or pitch is on a uneven surface. I would recommend no less than 16lbs air pressure. Also make sure both tires are the same roll out and the correct direction.

mr305 · 01-04-2008, 08:48 PM

Thanks for all your post guys. Ya'll are teaching me here since im a rookie at this kinda stuff. i do know the circumfrance of the tires are the same to and 1/8 inch. and they are all heading the right direction. i just dont wanna crunch up there car or anyone elses for that matter. i just wanna get it fixed. Thanks again for all your guys help. and if you have any other suggestions please don't hesitate there is still alot of winter left and i get bored pretty easy lol. thanks
aaron disinger
327y
gt/ha

Joe Hertline · 01-14-2009, 01:37 PM

along with the front snubbers, if you're having problems with wobble at the top end in the shutdown make sure the front snubbers hit at the same time...ie push down on the front of the car and be sure that one side does not go down farther than the other. When you're slowing down, the front end usually bottoms down and uneveness can cause oscillation that is magnified in the radials. Might be part of the problem, but shocks are likely to contribute too. Good luck finding the cause.

Dick Kirkpatrick · 01-14-2009, 04:01 PM

Sounds to me like you don't have any (or not enough) toe in.
This will also scrub off mph

01-04-2008, 11:00 AM	#1
Greg Hill VIP Member Join Date: May 2006 Location: Louisville , KY Posts: 1,995 Likes: 69 Liked 279 Times in 68 Posts	Re: Radial Wabble Problem Put some snubbers on the front end so the front end can only go down so far. You will be amazed at how much that will help. Greg

01-15-2009, 11:45 AM	#2
Roger K Fain Member Join Date: Mar 2006 Location: Clarksburg, WV Posts: 146 Likes: 0 Liked 0 Times in 0 Posts	Re: Radial Wabble Problem In your description of the problem you left out many of the possible contributing factors. What is happening to the vehicle is the suspension is unloading upon deceleration and finding weak points in the structure or geometry. The radials are a major contributor to the reaction of the suspension, but not the initiater. If you have a four-link suspension, you may have a problem with your wishbone flexing, bending, or just loose in the mounting.Check to ensure that all connecting points of bars are sufficiently secured and not allowed to "wobble", thus keeping the car in a straight line until the suspension collects itself. Additionally, make sure the front suspension reacts equally in separation and compression and is totally fluid in movement.

01-04-2008, 02:04 PM	#3
mike withers Junior Member Join Date: Dec 2007 Posts: 67 Likes: 4 Liked 3 Times in 1 Post	Re: Radial Wabble Problem I had heard the radials should only be used on automatic cars but I just had to try them on my stick car. Wow! the tire shake was incredible I thought I was in a fuel car. It didn't settle down until I put it into third gear.The announcer at Norwalk said it looked like basketball going down the track More air pressure did not help Two passes were enough for me to see the light. They just do not have enough sidewall. As for your problems I have observed wobbles similar to what you are experiencung on My buddies sperstock hemi car. I do know he has double adjustable shocks front and rear. Last edited by mike withers; 01-04-2008 at 02:08 PM.

01-04-2008, 03:00 PM	#4
tim worner Senior Member Join Date: Jan 2002 Location: duncannon Posts: 837 Likes: 14 Liked 126 Times in 20 Posts	Re: Radial Wabble Problem We have M/T radials on all 3 of our cars and have no problems. For sure a radial tire will bring out any problems in your suspension and also the track. The only time my car tends to roll or pitch is on a uneven surface. I would recommend no less than 16lbs air pressure. Also make sure both tires are the same roll out and the correct direction. __________________ Tim Worner SS 1747

01-04-2008, 08:48 PM	#5
mr305 Member Join Date: May 2007 Location: Monticello Posts: 160 Likes: 0 Liked 2 Times in 1 Post	Re: Radial Wabble Problem Thanks for all your post guys. Ya'll are teaching me here since im a rookie at this kinda stuff. i do know the circumfrance of the tires are the same to and 1/8 inch. and they are all heading the right direction. i just dont wanna crunch up there car or anyone elses for that matter. i just wanna get it fixed. Thanks again for all your guys help. and if you have any other suggestions please don't hesitate there is still alot of winter left and i get bored pretty easy lol. thanks aaron disinger 327y gt/ha

01-14-2009, 01:37 PM	#6
Joe Hertline Junior Member Join Date: Feb 2002 Location: Marcy, NY Posts: 57 Likes: 16 Liked 3 Times in 2 Posts	Re: Radial Wabble Problem along with the front snubbers, if you're having problems with wobble at the top end in the shutdown make sure the front snubbers hit at the same time...ie push down on the front of the car and be sure that one side does not go down farther than the other. When you're slowing down, the front end usually bottoms down and uneveness can cause oscillation that is magnified in the radials. Might be part of the problem, but shocks are likely to contribute too. Good luck finding the cause. __________________ Joe Hertline 1318 SS/FA

01-14-2009, 04:01 PM	#7
Dick Kirkpatrick Junior Member Join Date: Dec 2005 Location: Carlise, Ontario, Canada Posts: 73 Likes: 0 Liked 0 Times in 0 Posts	Re: Radial Wabble Problem Sounds to me like you don't have any (or not enough) toe in. This will also scrub off mph __________________ Dick Kirkpatrick 3033 SS