So me and my buddy just installed a PMU racing BBK on all four wheels. Soon as they were installed we took it around the block for a test drive. Everything was working fine and the car stops like mad.

We drove around a bit more and we heard an intermittent rubbing noise coming from the rear. After driving around a bit more it would cease from the rear left and then a while later from the rear right. We think it's the pads as they are floating and when the car gets going the wind pressure pushes them outwards. Anyone know for sure?

Also, when the car is idle and I creep forward a bit, it feels like the brakes are being applied and it stops. It won't roll on a gradual slope either like it did before the install. I believe this is because the pads are brand new and there is no play between the rotor and the pads (yet).

Any insight is appreciated!

Here's a teaser:

 

Wish I could help but I have zero experience with BBKs. However those look ****ing hot. Color match lugs to the brakes by any chance???

 

Thanks buddy. Yeah I was thinking of trying the Project Mu lugs or the Rays blue (the pictures make it look kinda green). Still need to pay off the BBK tho

 

I'm just throwing this out there since I have no BBK experience. But maybe its the knock-back springs on the caliper pistons that's causing the brakes to be minimally applied, and therefore the car doesn't roll as much when in neutral on a slight incline. Just a thought. Probably wrong but oh well ha

 

I didn't see you mention that you did the bed-in process. Most brakes pads need to be bedded in to mate the brake pad surface with the rotor surface. There is a thread somewhere here on how to do it. If not check the stop-tech site, I think there is a how to there. Though it's a different brake company and pad composition, the process should be the same. Sounds like you did the bleeding process right since you're getting good stopping power from minimal pedal effort. Hope that helps.

 

Woah MethodRN I had no idea about the bedding-in process. Thanks! I've been driving the car normally for about a week. I hope I didn't screw anything up.

 

Nah, you won't screw anything up. Again, bedding in may not solve the issue, but it's something you should do whenever changing pads/rotors.

 

lol project Qs

 

for anyone interested, I bedded in my brakes a few nights ago and the rolling issue has stopped

the rears are squeaking a bit at low speeds though, i hope it stops soon

 

^ I dont have bbk, but installed new rotors/pads and had same prob after bedding. Still sqeeks only in the back on one side. Havent figured it out yet...its not a warped rotor or glazed pad as far as i can tell...

 

some brake pads just squeal a little bit, it doesn't mean there is anything wrong with it

 

I think squeaking is also common with pads that do not have shims - this may or may not be the case.

Nice looking BBK. Good to see you did the bed-in process too.

 

Check and make sure the calipers are properly spaced in the rear against the rotors.. Also make sure nothing is loose...aka pad guides, etc. Nice billets

 

Yeah, its def not this ^ , it must just be the pads.

I've driven another guy's Z before where the shop forgot to put on the shims, you have no idea how loud the car sqeeks without the shims....its insanely loud, much louder than when your pads are low.

 

word. i think mashing on the brakes during the bed in process maybe misaligned something. i'm going to take the rear caliper off and make sure everything is seated properly.

 

Update!

So apparently I took the bed in process too far and the rear brakes got too hot. This resulted in extreme cringe inflicting squeaks from the rear. The rotors and pads were glassed over with a shiny appearance. So I resurfaced the rear pads (and front to be sure) and no more squeaks! Also, being able to remove the pads without taking off the caliper = WIN