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Old 09-15-2019, 05:48 PM
jlwdvm jlwdvm is offline
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Default Grinding/rubbing/squealing from rear FNSL and BP30's

I have 4-piston FNSL and Spec 37's on the rear of my Firebird track/street car. I had BP10's in all calipers (fronts are Aerolite 6's) for my first track day in May. The brakes performed ok, but I wanted more response for the street and track. I went to a DSE booster and Master cylinder (was a manual Wilwood) and BP30's. I scuffed the rotors with 80 grit before changing pads and bedded them in before my last track day in August. I now love the feel of the brakes, but I'm getting an annoying grinding/rubbing/squeal from the rears. I hear it when I am pulling up to a stop and probably slow to between 5-7 miles an hour. It isn't heard when I am on the brakes....only when coasting. If it starts, I can make it leave by applying the brakes. My rotors had a weird look to them after my last track day and didn't have a uniform burnished look to them. I scuffed the rotors again, but the sound is still there.The sound has been there since I changed pads no matter what I have done. Could it be the pad-rotor interface, of maybe I need to lube some contact points? Thoughts?
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