StopTech Rotors rubbing

Minicobra1 · 06-22-2009, 07:02 PM

Installed my Stoptech rear slotted/drilled rear rotors yesterday. there is an intermittent scrapping/rubbing sound coming from the left side. I can especially hear it when driving with the window down and close to the center island or in an alley.
Is it because the pads need to wear to the new rotor, I have 8300 miles on the old ones, or is it possible the rotor is warped or bent?? the right side does it slightly but not nearly as bad. When I installed the fronts I never had this issue, there was only about 3000 miles on the car though. Any thoughts, suggestions appreciated

ejrives · 06-22-2009, 07:39 PM

Quote:

Originally Posted by Minicobra1

Installed my Stoptech rear slotted/drilled rear rotors yesterday. there is an intermittent scrapping/rubbing sound coming from the left side. I can especially hear it when driving with the window down and close to the center island or in an alley.
Is it because the pads need to wear to the new rotor, I have 8300 miles on the old ones, or is it possible the rotor is warped or bent?? the right side does it slightly but not nearly as bad. When I installed the fronts I never had this issue, there was only about 3000 miles on the car though. Any thoughts, suggestions appreciated

Yes, it usually takes a while for the pads to seat to the new rotors. The noise you hear is excess grooves in your pads being worn off by the new rotors , as they aren't fully seated. No need for worries.

travisjb · 06-22-2009, 07:50 PM

did you follow their recommended bed in procedures?

StopTech : Balanced Brake Upgrades

ChrisSlicks · 06-22-2009, 09:18 PM

You have to drive for 20 or 30 miles to wear off the coating before following the bed in procedure.

The extra noise could be from the drilled rotors (which I don't recommend to anyone) or it could be from high spots on the pads if your old rotors weren't perfectly flat.

Minicobra1 · 06-22-2009, 09:37 PM

Quote:

Originally Posted by travisjb

did you follow their recommended bed in procedures?

StopTech : Balanced Brake Upgrades

I wasn't sure about that process, because the pads were not new, but I see now that they still recommend it. I will give it a try

Minicobra1 · 06-22-2009, 09:38 PM

Quote:

Originally Posted by ChrisSlicks

You have to drive for 20 or 30 miles to wear off the coating before following the bed in procedure.

The extra noise could be from the drilled rotors (which I don't recommend to anyone) or it could be from high spots on the pads if your old rotors weren't perfectly flat.

Well, I driven about 50 miles now, so I will try it. thanks

travisjb · 06-22-2009, 10:37 PM

good luck, let us know if it helps

Minicobra1 · 06-24-2009, 12:44 AM

Quote:

Originally Posted by ChrisSlicks

You have to drive for 20 or 30 miles to wear off the coating before following the bed in procedure.

The extra noise could be from the drilled rotors (which I don't recommend to anyone) or it could be from high spots on the pads if your old rotors weren't perfectly flat.

Ok, did the bedding in procedure, have about 100+ miles on them so far and still have the scrapping sound. If it's high spots on the pads, how long before they start to seat on the rotors?? Or should I just replace the pads? there is about 8300 miles on these ones, they are the stock pads.

travisjb · 06-24-2009, 02:10 AM

couldn't hurt to try a different set of pads... always helpful to have an extra set anyways... give it a shot... try another brand and compound as well

Minicobra1 · 06-24-2009, 02:47 AM

Quote:

Originally Posted by travisjb

couldn't hurt to try a different set of pads... always helpful to have an extra set anyways... give it a shot... try another brand and compound as well

Yeah, driving home to night, the lite scrapping sound has now turned into a chirp.
chirp, chirp, chirp, chirp, chirp, I think I have a hamster wheel or birds in my brakes

Ok, seriously, I'm a bit concerned because I'm taking an 800+ miles trip on Friday.
So, I either try new pads or put the stock rotors back on, or hope that the pads seat to the rotor during the trip. What are the chances that the rotor surface is not machined correctly?

Also, if I change out the pads in the rear, should I change the front too? or is it ok to run different brands front and rear?

travisjb · 06-24-2009, 10:56 AM

ok to run different brands IMO... and i'd guess 90% likely this will work itself out... remind us, which pads are you running ? OEM pads ? were they new at time of install of rotors ?

Minicobra1 · 06-24-2009, 06:36 PM

Quote:

Originally Posted by travisjb

ok to run different brands IMO... and i'd guess 90% likely this will work itself out... remind us, which pads are you running ? OEM pads ? were they new at time of install of rotors ?

Ok, cool, I was thinking of trying the Hawks, any recommendations?
Pretty much street use with an occasional canyon run once a month.

Yes, I have OEM pads on now, there was about 8300 miles on them when I installed the rear rotors.

travisjb · 06-24-2009, 08:40 PM

my recommendation is OEM recommended pads unless you plan to track it... this may be unpopular with some ppl, but until you start having fade issues, no reason to upgrade the pads... and some of the higher friction pads have downside too, like more dust, longer to build up heat and perform, etc

sensi09 · 06-24-2009, 08:53 PM

If the bedding in procedure didn't help matters, you may have some debris between the pads and rotors. Perhaps a rock or something of the like.

ChrisSlicks · 06-24-2009, 09:58 PM

Did you follow my installation procedure? It almost sounds like your rotor isn't perfectly flat against the hub.

06-22-2009, 07:02 PM	#1 (permalink)
Minicobra1 A True Z Fanatic Join Date: Nov 2008 Location: Orange County, CA. Posts: 1,205 Drives: 370Z Tour, Spt, 6mt Rep Power: 644	StopTech Rotors rubbing Installed my Stoptech rear slotted/drilled rear rotors yesterday. there is an intermittent scrapping/rubbing sound coming from the left side. I can especially hear it when driving with the window down and close to the center island or in an alley. Is it because the pads need to wear to the new rotor, I have 8300 miles on the old ones, or is it possible the rotor is warped or bent?? the right side does it slightly but not nearly as bad. When I installed the fronts I never had this issue, there was only about 3000 miles on the car though. Any thoughts, suggestions appreciated __________________ 370z Tour\| Spt Pack\|Navi\|BERK CBE\|Berk HFC's\| Eibach Springs\| Hotchkis Sway Bars\|SPC Camber Arms\|15mm Ichiba Wheel Spacers\| 19"Factory Nismo Wheels-Matt Black\|Stop Tech Rotors\|TWM Shifter\|3M Tint\|Black Fangs\|Black Rear Valance\|JDM Fog Light\| MY BAND-www.myspace.com/petroleum

06-22-2009, 07:50 PM	#3 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	did you follow their recommended bed in procedures? StopTech : Balanced Brake Upgrades __________________ 2009 370Z #104 For Sale

06-22-2009, 10:37 PM	#7 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	good luck, let us know if it helps __________________ 2009 370Z #104 For Sale

06-24-2009, 02:10 AM	#9 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	couldn't hurt to try a different set of pads... always helpful to have an extra set anyways... give it a shot... try another brand and compound as well __________________ 2009 370Z #104 For Sale

06-24-2009, 10:56 AM	#11 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	ok to run different brands IMO... and i'd guess 90% likely this will work itself out... remind us, which pads are you running ? OEM pads ? were they new at time of install of rotors ? __________________ 2009 370Z #104 For Sale

06-22-2009, 09:18 PM	#4 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	You have to drive for 20 or 30 miles to wear off the coating before following the bed in procedure. The extra noise could be from the drilled rotors (which I don't recommend to anyone) or it could be from high spots on the pads if your old rotors weren't perfectly flat.

06-24-2009, 08:40 PM	#13 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	my recommendation is OEM recommended pads unless you plan to track it... this may be unpopular with some ppl, but until you start having fade issues, no reason to upgrade the pads... and some of the higher friction pads have downside too, like more dust, longer to build up heat and perform, etc __________________ 2009 370Z #104 For Sale

06-24-2009, 08:53 PM	#14 (permalink)
sensi09 Enthusiast Member Join Date: Dec 2008 Location: so cal Posts: 449 Drives: _ Rep Power: 16	If the bedding in procedure didn't help matters, you may have some debris between the pads and rotors. Perhaps a rock or something of the like.

06-24-2009, 09:58 PM	#15 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	Did you follow my installation procedure? It almost sounds like your rotor isn't perfectly flat against the hub.

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