And this is why you need to test new designs.....
On run 3 of an autocross at Tavares, Fl on Sunday we had a catastrophic failure of the left caliper adapter. The failure appears to have initiated at the top of one of the counterbored holes (where it is close to the inside corner of the "backbone" on the bracket). So the counterbores will be eliminated on the next revision, and we'll use steel for the brackets, probably 4130.
The good news is the damage was minor... bracket (obviously), trashed caliper, torn brake hose, minor scratches on inside of wheel. Spindle, hub and rotor unaffected.
My son (driving) did say the braking was excellent before the failure.
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