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Drag Racing Discussions => Front Engine Dragsters => Topic started by: Aludigger18 on July 14, 2020, 04:32:48 AM

Title: Front tire wobble fed
Post by: Aludigger18 on July 14, 2020, 04:32:48 AM

I have a problem with my front end.
Every time I use my breaks to stop,the front wheels start to wobble
Like after the burnout.
My caster angle is 16 degrees
Is the angle to little?
17" Front-wheel
The fed is 190" long with a blown big block

Title: Re: Front tire wobble fed
Post by: Paul New on July 14, 2020, 08:11:02 AM

I changed my car from 28 to 15 degrees as per recommendation from Frank Parks and my car drive like a dream went 212MPH.  My car drove good at 28 but was a bitch turning off at the top end. 

Have you checked your king pins and heim joints for slop?

Title: Re: Front tire wobble fed
Post by: THE FRENCHTOWN FLYER on July 14, 2020, 02:39:03 PM

Two suggestions:

Take some more caster out.
Add a steering damper, like a Fiero unit.   https://www.fierostore.com/Product/Detail.aspx?s=58026&d=324&p=1

Title: Re: Front tire wobble fed
Post by: Paul New on July 21, 2020, 07:52:18 PM

Have you figured anything out?

Title: Re: Front tire wobble fed
Post by: BK on July 22, 2020, 10:22:37 AM

If you could add a few degrees of caster easily it couldn't hurt.
The other thing you could check is toe in.
Make sure to spread the front or pull the back of the wheels together to make sure any play cant go past your setting.

Title: Re: Front tire wobble fed
Post by: Aludigger18 on August 12, 2020, 08:38:40 AM

I have adjusted the caster 21 degrees, so I’m going to try it out at the race i a few weeks
Thanks for the reply’s