Quote:
Originally Posted by dlampe
The general rule of thumb is .020 per inch up or down. Bob, I'm not sure the gauge in the picture will give you the answers you need. As the wheel moves through its motion it will move in and out because your control arms move through a natural arch. To measure how much the toe changes, you would need to place your dial indicator in the front(as you have it) and one in the rear. As the tire moves, measure the change front and rear then subtract one from the other. That is your bump steer number.
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It works pretty well. I only own 1 dial indicater. So first I measure the front, and write down the numbers for every inch of movement. Then I flip it over, and measure the back in the same way. Then, just like you, I subtract one from the other.
My bumpsteer varies from 0.005-0.010", all toe out, no toe in.
The trick, I think, with measurements this precise is to do it 4-5 times, and make sure they're repeatable and consistant.