kostantinos

iTrader: (1)

I added the RL calipers/ Stoptech drilled rotors and brackets to my TSX and the braking is fine under normal use, but under hard braking, they make a scratchy grinding noise.

I figure they may need time to break in? But I'm not too sure
Is there something wrong?

Any thoughts?

kostantinos

iTrader: (1)

I have been going over everything in my head and the only issue I can see so far is the rotor. Since it's from a 350z, it's not centered 100%; it has about 4mm of play. I'm going to get a spacer made to see if that could be causing the issue?

Not sure because when the wheel is bolted down, the rotor doesn't move

JnC

iTrader: (12)

Do you also get a throbbing feel in the pedal under hard braking? I ask as I have the same set up on my TL i.e. RL calipers, stoptech rotors for 350z and EBC red stuff pads. I know the vibration I am getting is not wrapped rotors, your point seems to be a valid guess

kostantinos

iTrader: (1)

Yeah but it makes a scratchy grinding noise too

robpp

iTrader: (2)

the rotor should be in the center of the caliper.

if anything you move the caliper not the rotor.




did you get the 350Z rotors that fit the brembo brakes?

what kind of pads?
did you BED the brakes? that is probably your issue. you need to do about 10 real hard stops till they are smoking hot, then park until they cool. most pads have directions on how to bed. different brake material may have a different process.

last point, if you got very metallic brake pads then they may ALWAYS be noisy.

kostantinos

iTrader: (1)

The centerhole from the 350z rotor is 68mm, the tsx hub is 64.1.
When you put the rotor on, there is play from the stud holes, so the rotor is not 100% centered as weigh is pulling it down.

I have the stoptech drilled rotors, others with the brembo blanks have no issues they say.

The caliper is pretty much covering the pads, if anything 1mm inward would be beneficial but it cant do that unless you machine the brackets down.

I got oem RL pads from Acura. I drove around and used them normally, I didn't bed them in any special way.

robpp

iTrader: (2)

i wasnt speaking of a brembo blank.

they make different rotors for the 2006 350z; with brembo calipers and without.
did you buy the correct ones for brembo calipers?

next.

you have performance rotors. they need to be bedded.

go read on stoptech about bedding. or adams rotors.

it basically burns a layer of brake material INTO the rotor material.

kostantinos

iTrader: (1)

oh of course, I bought the 350z track rotors, from the brembo equipped cars.
It wouldn't work with regular 350z rotors

I can sand the rotors and pads down and try to bed them but I don't know

robpp

iTrader: (2)

no sanding.


you bed them while driving.

Essex - Learning Center - Know Brakes 1: How to Bed-in Brake Pads and Rotors

kostantinos

iTrader: (1)

I was told a while ago by tire rack that if you need to rebed the pads, to sand down the rotors and pads so they lose their shine a bit.

robpp

iTrader: (2)

i have heard of that. never done it or seen it done.

but you havent bedded them once yet have you?


i like to bed them on sunday morning in a trucking industrial area near the highway.

about 10 good stops from speed until they fade...then a few more....they now smoking.......then i head to the highway , rollling through the lights so i dont have to full stop....get on highway and drive for 10 or more miles without touching the brakes.

DONE.

kostantinos

iTrader: (1)

Update

I removed the wheels today and added spacers to center the rotor, will report back of any changes.

While there, I removed the pads to check them; I noticed the outer edge is not touching the rotor at all thus creating a lip on the pad. There's about a 1.5mm lip on the pad.

Wondering if the adapters need to be shaved down a bit? Could this be causing the issue?

robpp

iTrader: (2)

i still think you have the incorrect rotors.......but



did you rebuild those calipers. its almost like the front piston isnt coming all the way out. lots of lube when you put them back together. and all the seals more lube?

or something not lining up.

when you look at the edge of the rotor......the side of it if you will......does it line up perfectly centered in the caliper......lining up with the split in the calipers?

it should be almost exact/

kostantinos

iTrader: (1)

Calipers we're not rebuilt. Sav taped them and painted them

I don't think it's a piston issue, all 4 pads have an edge of equal size
About 1.5mm
I think the caliper needs to be inward a little bit.
the rotor is centered between the pads

I'll try to take some pics

kostantinos

iTrader: (1)

robpp

iTrader: (2)

ok i was thionking the front part of pad.

so you are talking about the top of the brake pad.





a slightly bigger diameter rotor with everything else the same looks like would take care of your issue.

or like you say shaving the mounts down.

robpp

iTrader: (2)

measure your rotor diameter. i think it should be 330

but they do make 328 etc.

kostantinos

iTrader: (1)

Sav has plain rotors with no issues. he says they are brembo
But I can't find a listing for them for the brembo 350z

Mine are 12.75 stoptech. I'm just wondering if they are smaller
Than what everyone else Is using

robpp

iTrader: (2)

check with sav for his exact diameter.

i dont have mine anymore so I cannot comment.

I did look at ebc rotors, trying to find measurements.

they seemed to offer a 12.8 and a 12.7.

perhaps you need the 12.8

EBCBrakes | EBC UPR Non-Slotted Rotors | Shop EBC Brakes offers Free Ground Shipping on Brake Orders over $50.00!

kostantinos

iTrader: (1)

Sav is looking into which rotors he got, he swears they are brembo but I can't find any info on brembo making plain rotors for that car, only expensive drilled rotors at $400+ each.

I'm trying to come up with a combination of a bigger rotor and/or machining the adapter. I checked with centric/stoptech/dba and even though the 350z calls for a 12.8 rotor, their applications are between 12.65 and 12.75. They all run a little small.

I'm wondering in the pads play a part too, maybe the oem pads are a bit bigger and aftermarket pads are not?

robpp

iTrader: (2)

here is blank brembo rotor but only make it for the NON BREMBO version. its smaller.
at least what I can find. for the brembo caliper they only sell the 450-500 version lol


Front - Brembo OE Brake...

kostantinos

iTrader: (1)

I think sav got some generic rotors and thought they were brembos
I'm waiting to hear from him so I can figure this out

kostantinos

iTrader: (1)

I asked someone else who did the conversion and he used
Stoptech rotors like me but he said he used 350z pads

Are we we supposed to use rl pads or z pads?
Didn't even know z pads would fit in rl calipers

robpp

iTrader: (2)

that doesnt sound right.

350z doesnt have this caliper......they have BREMBO.

ikethegreat

350z pads will not fit in the caliper...

Rotors should be 12.8", not 12.75". That's why the whole pad isn't touching the rotor and that is what is causing the grinding.

kostantinos

iTrader: (1)

I've looked at rotors from many vendors for the z, and none of them are 12.8
which is weird if that's what the car calls for

I'm going to try different pads and try to shave the brackets down

robpp

iTrader: (2)

i have some stoptech pads somewhere if needed.

the EBC make a 12.8

kostantinos

iTrader: (1)

I dont want to take your pads
you could probably sell them but if you find them can you measure them for me

robpp

iTrader: (2)

yeah sure i can measure them. i think i know where they are/

kostantinos

iTrader: (1)

Spent the day in the garage on my day off



Added the spacer to center the rotor, noise still present, but I feel better the 4mm difference is gone

Then inspected everything, there's a 2mm ring on the inner part of the rotor, where the pad doesn't touch,
and a 2mm lip on the pad where the pad hangs off of the rotor on the outside.

I'm going to see if ffc can make me new brackets as I dont want to put the oem brakes back on and deal with bleeding.

iCrap

ooohh nice e36

robpp

iTrader: (2)

Hi

What exactly do you want me to measure?





Posi Quiet

kostantinos

iTrader: (1)

The top of the bracket to the top of the pad

robpp

iTrader: (2)

ok notice the shape of the backing. i measured right in the middle.

.285 of an inch

xtcnrice

Any updates kk?

Others with the RL BBK should speak up! It'd be nice to know what the "correct" setup actually is.

kostantinos

iTrader: (1)

The brackets are 32mm. I believe they should be 30mm

I have asked savclaude to measure his setup but he hasn't
Gotten back to me yet. Neither has chuonthis. Xakeo has issues like me.

Here is my setup, you can see 2mm area where the pad doesn't touch the rotor


This is xakeo's, his looks a little worse than mine


This Is sav's

xtcnrice

Is xakeo using the FFC bracket as well? Maybe someone with the RL BBK and a different bracket could chime in (FastBrakes for example). Did the spacer (I assume you mean hub ring) make any difference to the grinding issue? Or did it just simply remove any "play" from the rotors? Basically wondering if the spacer/ring is necessary. I know FastBrakes kit comes with a spacer/ring.

Robpp, which brackets were you using? I'm guessing you sold the whole kit (calipers, brackets, etc.) to chouonthis.

kostantinos

iTrader: (1)

All of them on ffc

xtcnrice

.

xtcnrice

Also, you mentioned that xakeo "has issues like [you]". By that do you mean he's experiencing grinding issues on hard braking as well? Or just the fact that a few mm on the inside of the rotor not being used?