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06-21-2010, 12:07 PM | #1 |
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Vehicle:2003 WRB WRX Vf48 Tuned @ FAT by Snail Perf |
Need Help Quick! Need To Tuen Slotted Rotors.
Can't seem to find anyone in Phx who will turn slotted rotors. I have dba 5000 series rotors that I KNOW can be turned. Any help/suggestions is appreciated as I have to drive back up to Flag tonight. I'm about to just say screw it and throw new pads on without turning them.
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06-21-2010, 01:25 PM | #2 |
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I never turn rotors. Most people in the know don't either. Unless they are severely grooved, just save the cash.
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06-21-2010, 01:43 PM | #3 |
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06-21-2010, 03:16 PM | #4 |
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you don't turn slotted rotors or you dont turn rotors at all?
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06-21-2010, 03:56 PM | #5 |
Scooby Specialist
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Vehicle:15 WRX 6MT 07 Legacy SpecB |
I don't turn them at all, unless there is a clear and concise problem with the rotor..
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06-21-2010, 04:42 PM | #6 |
Scooby Newbie
Member#: 138915
Join Date: Jan 2007
Chapter/Region:
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Location: Flagstaff, AZ
Vehicle:2003 WRB WRX Vf48 Tuned @ FAT by Snail Perf |
Cash isn't the issue I just don't want to have problems when beading in the new pads.
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06-21-2010, 06:09 PM | #7 |
Scooby Specialist
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Location: prescott valley, az
Vehicle:2004 wrx wagon 2.5 20g-xt, super slow |
use garnet paper, the feeling of warped rotors is usually a result of cementite buildup from the pads.
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06-21-2010, 06:47 PM | #8 |
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Location: oh, you have a bf?
Vehicle:that 's cool. i have a goldfish. |
if you really want them turned, there is a guy in prescott that can do it for you, i think its a and g machining? on valley st in PV
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06-21-2010, 10:06 PM | #9 |
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Location: South Ogden
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take a really REALLY fine grit sandpaper to em. because like what dan az said, the "Warping" is usually a buildup of brake crap.
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06-21-2010, 10:10 PM | #10 | ||
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Quote:
You got to be careful what type of sandpaper you use. Garnet only like dan az said. Quote:
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06-21-2010, 10:16 PM | #11 |
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PM thegreg the shop he works for in Tempe will turn slotted rotors
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06-22-2010, 12:29 AM | #12 | |
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Quote:
At our shop we machine rotors every time we do a brake job, if the rotor has a smooth surface. Bottom line is the pad is rough new, and so is the rotor, why wouldn't you want to create the same starting environment as when the parts were brand new? A rough pad and smooth rotor will more then likely cause brake noise, and glaze the pad prematurely. You wouldn't put a clutch in with out machining the flywheel would you? And yes we can machine slotted/drilled/JDM/chocolate rotors at the shop I work for. Arizona Auto Care 5245 S Kyrene #104 Tempe, AZ 85283 If they have rotor hats, please remember to bring those with you. |
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06-22-2010, 03:44 AM | #13 | |
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Quote:
Because most of the time it's not actual warping, it's just a buildup of brake crap on the rotor from the pads heating up, then cooling down and leaving residue. I've had warped rotors and rotors with brake buildup, and I honestly couldn't tell the difference until after I had sanded off the brake crap. and kpluiten thanks for correcting me. yes only use garnet. I couldn't remember if I had used another kind for some reason. |
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06-22-2010, 04:11 AM | #14 | |
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Quote:
+1. couldnt have said it better myself. If your brake pedal steering is pulsating when you apply brakes you have warped rotors. If not, And dont really care just do a pad slap. But its better to have them turned. |
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06-22-2010, 07:11 AM | #15 | |
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Quote:
http://www.stoptech.com/whitepapers/...otors_myth.htm |
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06-22-2010, 07:12 AM | #16 | |
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^ This guy knows the truth. |
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06-22-2010, 12:12 PM | #17 | |
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Quote:
I read that article, and looked at the photos, the dark spots "brake pad deposit" looked just like "hot spots". Which often times can go completely thru the rotor. It doesn't make sense (unless stritcly race application) that the pad material would leave anything on the rotor. The rotor is more dense/hard then the pads. That's why the pad wears down before the rotor does. I could be wrong when it comes to race application, THAT I dont have experience in. If the rotor didn't need to be machined, why, when it comes new does it have a non-directional machine to the surface? Why not leave it smooth as I am assuming it comes out of the lathe? Just my extra 2cents. Now I have none left. |
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06-22-2010, 12:23 PM | #18 |
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how much do you want to turn chocolate rotors?
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06-22-2010, 12:33 PM | #19 | |
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Quote:
All I'm saying is that is the explainantion (that I linked to) from a brake system engineer with decades of experience. I bet he's see a few things and done more than a few tests. |
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06-22-2010, 12:40 PM | #20 |
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its not technically the pad material itself that is being deposited on the rotor, its partially the crap that hold the pad together, ive been able to cure every "warped rotor" pulsation ive ever had on the wrx with garnet paper. (i have big brembos with slotted rotors) if it doesnt work just turn them but evertime you turn rotors your taking away rotor material.
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06-22-2010, 12:43 PM | #21 |
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True, it's the binder or resin I guess. It can overheat and i assume become sticky. This coupled with the pressure exerted by the caliper embeds it.
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06-22-2010, 06:46 PM | #22 |
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06-22-2010, 09:14 PM | #23 |
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06-22-2010, 09:33 PM | #24 |
Scooby Specialist
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