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02-05-2013, 11:06 AM | #1 |
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Is Cryo Treatment Worth It for Rear Rotors?
Heading into my first track season I'm pretty much set on buying a set of blank rear rotors since I've heard that the E46 ZCP drilled rotors aren't great for track duty.
Tirerack has plain blanks for $58 each and cryo treated blanks for $82. Is there any real benefit for track applications to the cryo treated rotors? |
02-05-2013, 11:18 AM | #3 |
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So is this a case where I shouldn't even worry about my rear rotors? I am just suspect of the ZCP rotors and they are about 2mm over min-spec thickness. I'd hate to have them warp and then be in a pinch of needing new ones at the track.
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02-05-2013, 11:32 AM | #4 |
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Never owned a E46, but I can tell you that I left the stock rears on my E92 even with Stoptech bbk up front and it works great (and I'm hard on brakes). I would change pads to stoptech street performance or real race pads though.
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02-05-2013, 11:47 AM | #5 | |
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I bought a Stoptech ST40 355mm front kit and bought PFC01 pads for the front and back. For $135 for a set of regular blank rear rotors I decided it's worth the peace of mind to know that if my ZCP rear rotors warp I have a set of new ones in my track tool kit. |
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02-05-2013, 01:24 PM | #6 |
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I tacked my E46 for 7 years and only needed to replace the rear rotors once. I was using stock rotors. I would not worry.
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02-05-2013, 02:37 PM | #7 |
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Rear rotors will be fine. Most people claiming to have "warped" rotors actually have uneven pad deposit which can be corrected relatively easy with re-bed when pads are cold and abrasive.
I replace my pads on the front 3 times for every rear pad replacement, which is another way to say rears should be fine. This is for E46 M3 with pagids and slotted rear rotors. |
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02-05-2013, 02:57 PM | #9 |
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Thanks again everyone for all the info.
I ended up getting a set of regular blanks for the rear for $135 to replace my ZCP rotors which have a decent amount of miles on them. For that amount of money I figured I can't really go wrong and I'm glad I didn't spring for the cryo treated ones. |
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02-13-2013, 07:00 PM | #10 | |
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02-13-2013, 07:59 PM | #11 |
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Skip the deep freeze IMO...spend the money on something else...like food/water at the track so you don't BONK and wreck your car! That's money very well spent...IMO.
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