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Old 10-07-2001, 03:12 PM   #1
Scooby Specialist
Member#: 10302
Join Date: Sep 2001
Chapter/Region: NESIC
Location: CT

Question New pads with new rotors?

i was looking into new rotors an brake pads. Does anyone have any suggestions for long lasting pads an rotors? An if i get new pads do i need new rotors? an vice versa. I was leaning towards the EGB green stuff for pads an some sort of slotted of cross drilled rotors. Any ideas?
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Old 10-07-2001, 06:32 PM   #2
Martin Ritchie
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Member#: 6771
Join Date: May 2001
Chapter/Region: MWSOC
Location: Sylvania, OH, USA
2002 WRX WagonSilver
04 WRX Sedan Red


According Nick Warne, who has been modifying WRXs for years, you should avoid replacing discs and pads at the same time. With use, rotor discs form a heat-hardened surface allowing them to bed in new, soft pads. Old pads are heat hardened and allow new rotor discs to be bedded in.
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Old 10-07-2001, 08:15 PM   #3
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Location: Detroit, MI

That's why new cars come with used pads or used rotors, your choice.

Sorry, couldn't help myself.
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Old 10-07-2001, 10:06 PM   #4
Aaron'z 2.5RS
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Location: Hickigan
'00 RS/WRX Stg5
'98 RS Stock


I found this on Baer racings site, it should explane a few things to you. http://www.baer.com/bedding_street/ I've always been told to never replace rotors and pads at the same time.

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Old 10-08-2001, 03:33 AM   #5
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2007 BMW 328xi wagon


Yup. If you're getting new pads, keep the old rotors for a while til the pads are broken in. Or vice versa... old pads for new rotors.

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Old 10-08-2001, 08:58 AM   #6
Patrick Olsen
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Join Date: Jul 1999
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Location: Where the Navy sends me...
1997 Legacy 2.5GT
QuickSilver Metallic


If you have the option of breaking in the new pads on the old rotors, go for it. However, if you have to replace both at the same time, it's not a big deal. I installed a full Baer brake system, front and rear, on my Mustang, so obviously I had new rotors and pads at both ends. I followed Baer's instructions for seasoning the rotors and bedding the pads and everything worked fine.

As for long-lasting rotors, get them cryo-treated. My track-duty rotors are OEM-sized plain Brembo rotors that I got from Diversified Cryogenics www.frozenrotors.com with cryo treatment. Thus far the rotors are holding up really well - I've gone through two whole sets of Porterfield R4 track-duty pads and the rotors look like they'll take another four or five sets. There are a variety of other companies that do cryo treating - www.onecryo.com www.300below.com are a couple. I think both of them offer the treatment for less than Diversified, but I'm not sure they'll source the rotors for you, so you might have to pay shipment charges (which is not insignificant when you're talking about shipping cast iron rotors).

Pat Olsen
'97 Legacy 2.5GT sedan
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