I recently did a oem brembo swap. They were off an 05 z. The previous owner had them paired up with slotted rotors ( no idea what kind). The only modifications I did were trimming the rear brake shields, picking up ss lines, motul 600, and hawk HP + pads ( extremely noisy). In the past two months ive twice encountered a "brake hop" in the right rear during right turns with semi-strong braking (not sure if it would do the same during a left turn). It just feels like the car experiences a jerk. Any idea what this could be? Could they not be installed correctly? Do the nameless used rotors need to be swapped for new ones due to warping? It is a very curious problem seeing as the week i installed them i went to streets of willow an didn't experience this problem after smashing on the brakes.

side note:
WHY ARE MY BRAKES SO NOISY?!? I know its due to the HP + pads i have but the noise level should have diminished some after doing the break in. Could this be a clue to the "brake hop"?

Thank you for all the input. I really dont want this to happen at the track. I think that would be very dangerous.

 

Anyone have any idea?

 

Can you show us the entire picture of your car so that we can see if the rotors are placed in the right direction?

 

http://i117.photobucket.com/albums/o...9/9bd26db8.jpg

http://i117.photobucket.com/albums/o...9/db7303ae.jpg

http://i117.photobucket.com/albums/o...9/09de779c.jpg

http://i117.photobucket.com/albums/o...9/935717bf.jpg

 

Anyone

 

Did you do a proper "bedding in"of the brakes? Along the lines of this...

https://my350z.com/forum/brakes-and-...nd-rotors.html

 

Prior to tracking the car I did preform the bed-in process. However since I had hp + pads, I did it at higher speeds (100-10)

 

I can't help you on the jerking you're describing but as far as the brake squeal, you can't avoid that with the HP+ pads. You'll just have to deal with the noise, sorry. I recently put the HP+ on mine and was surprised at how much squeal it had, also. All for the performance, I guess.

 

Did you measure the rotor run-out/material before install?
Have you inspected your setup since you ran at the track?

 

To your first question, "WUT?" to ur second, I have not. Lol

 

I get the feeling you bought some worn out components and
Beat them up at the track.

 

Which components are you suspecting? The rotors or the calipers?the calipers, lines, pads, seem to be doing their job well. The only
thing I would Think could be a problem would be the rotors.

 

Try to spray your brake pad pins with silicone ( helps reduce noise ).

 

You are braking with 'semi-strong' force in the middle of a turn?

Did you try this same routine with your old setup?

 

rotors. and what are the conditions of the pistons and rubbers w/i the calipers?

 

My what I mean when u say I brake during a right turn, I dont mean it in the track sense of it. I mean as I'm making a gradual turn it has jerked twice. As for the conditions of the rubbers and pistons I have no idea. Nor do I have the skill set to take them apart. I know there is a online store that sells a rebuild kit. I think it was the nismo shop??

 

SharX59- This might be a complete LONG SHOT, but thought I would add this since It hasn't been brought up yet.

I just installed a Wilwood BBK setup on my Z 2 days ago & had a Horrible sound happen when I initially started the bedding in procedure.

I would hit the brakes & it sounded like the rear end of the car had a loud harmonic vibration to it. like a VVVVVBBBRRRRR noise. Mine was really loud even @ walking speed.

I ended up releasing all of the parking brake tension inside the tophat on the rears. There's a 6th hole on the top hat that allows you to adjust the drum brake pad distance from the inside of the top hat. When you put that whole @ the 12 o clock position you can see a little gear. lifting up on the gear teeth with a flat head screw driver pulls the drum brake pads closer together.

I guess the ID between the Stock tophat & my Wilwood tophat were different. Once I did that the noise went away. The drum brake pad was touching the inside of the top hat as I hit the brakes.

It kind of sounds like the sound you're describing, so I thought I would chime in & might be worth giving it a shot, just to see. Just be careful because you're messing with the parking brake. I don't want your Z to go flying down a hill or something.

 

^ Not too proficient at typing on an iPhone

 

Thanks for the input but I don't really know what those components are that your referring to, as I have no exp. From what in getting, it's seems that the concern might be my calipers (I.e. They need to be rebuilt). Is there a consensus on that assumption? What is also puzzling is a close friend of mine on the forums "FastZ33" did the same swap and has yet to encounter this problem. And he has more track days with this same setup than I. Only difference is that his rotors are crossed drilled & slotted and that his slots go in the opposite direction of mine.

 

Any ideas?