need help with a thumping noise from my baer brakes

[jimtash]

I recently installed a baer brake kit on my '89 SHO and have a problem with the drivers side brake
since. When I press the pedal down in somewhat medium braking I get a thumping noise coming from that side. It will not do it during light braking at all and the passenger side brake is working perfectly. I was sent a replacment rotor from baer and it still does it. I am using the stock slicer wheels and everything was checked for clearances. The cooling fins had to be ground down in order to fit, but again there is plenty of clearance and that is a normal operation in order for the kit to fit the wheel. The tech guys at baer are thinking that since this is a floating caliper that somehow it is catching something on the wheel itself but there are no markings to indicate it. Otherwise everybody is clueless. Can anybody help?

 

[Toneboski]

What size is the kit? The rotors.

 

[jimtash]

It's the sport system with the 12.5" rotors.

 

[pjtoledo]

Might be a tire, try rotating side to side. Bent hub or other part. Can you feel it in the pedal, or just hear it?

Perry Toledo,Ohio

 

[jimtash]

I can hear and feel it in the pedal and the steering wheel.

 

[notstock]

jimtash:
The cooling fins had to be ground down in order to fit, but again there is plenty of clearance and that is a normal operation in order for the kit to fit the wheel.

I'm not sure those are so much cooling fins as they are structural reinforcements? I may be wrong, but I think they are there for integrity. When you install these brakes, you need to keep the brackets on the correct side, but swap the sides that the calipers go on. This will allow you to have the bleeder screw properly oriented at the top of the caliper while keeping the locking pin on the trailing edge of the caliper where it belongs. You must install them this way because these brakes are designed for a Mustang, where the brake caliper is located behind the strut, not in front of it like a SHO. Are yours installed this way? Having the locking pin on the leading edge may be causing this problem??

Kurt
www.kurtmetros.com

 

[jimtash]

Everthing is installed correctly and even Baer suggested that the cooling fins might need to be ground down even more than were already done. Yesterday I had an alignment and balance/rotation done to the car and the noise has seemed to stop. I think that the wheel that was originally there is out of round by a few thousandths of an inch and it was hitting the caliper ever so slightly when the caliper was moving under medium braking. How else can it explain that the passenger side has worked fine but the driver's side did not. I will let everybody know if the noise develops again. Thanks.