If your caliper is hitting a solid object, it is likely knocking the caliper piston back into its bore. Or, you don't have your spindles bearing tight enough and it's causing excessive brake pad knockback.
i had this same problem on a past project , it was the caliper making contact with the crossmember during a hard turn . pushing it off the surface, just as vegas69 said .
As long as the turning radius isn't compromised to much, sounds like the most economical fix.
What Todd said, just make sure you account for pad wear. As the outer pad wears, a floating caliper moves inboard the same amount, so you'll want to make sure that you won't make contact ever, even when the pads are ready to be replaced.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
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