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Author
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Topic: Spring Rubber experiment
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SugarlandStang
Journeyman Posts: 29
From: Sugar Land, TX
Registered: Dec 2005
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posted 05-13-2006 02:46 PM
   
I needed to get my front springs a little stiffer (mainly because of a tire rub when I hit big bumps). So instead of using smaller tires or buying stiffer springs or shocks, I tried the old NASCAR trick of adding a spring rubber. Two of them cost me $27 incl. shipping. Though I didn't notice a stiffer ride, I did notice that the rub (bump steer effect) went away. So, mission accomplished.  The spring rubber I bought was too thick to fit in my 67 spring, so I had to shave it down a little with a circular saw. What a mess! I do love the smell of burning rubber.  Essentially, doing this takes 1 of 8-10 coil turns out of service. So, a 10-12% stiffer spring...?
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Aussie XAXB
Journeyman Posts: 50
From: North Olmsted, Ohio
Registered: Jan 2006
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posted 05-15-2006 05:22 PM
Essentially you made a bumper stop, eliminating where the spring can travel. This is what is keeping the tire from rubbing. Your car may still experience a "bottoming out" of the spring condition in the amount of force applied to the shock tower. A tire rub and "bump steer" are two entirely different things. Bump steer is when your tires hit a bump and causes your wheels to change direction from where you were holding them with the wheel. It is turning of the direction of the front wheels without using the steering wheel but rather bumps in the road that cause the change.
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SugarlandStang
Journeyman Posts: 29
From: Sugar Land, TX
Registered: Dec 2005
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posted 05-15-2006 08:12 PM
Yes, you are correct. Bump steer and tire rub are two different things. However, if your tire rubs when you hit a bump, it will have the same effect as bump steer. I don't think I'm bottoming out the shocks. The tires rubbed because the tires I have on it are taller and wider than stock.
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