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Do slotted rotors wear more evenly with aggressive pads?

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Do slotted rotors wear more evenly with aggressive pads?

Old 03-09-18, 06:31 PM
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Do slotted rotors wear more evenly with aggressive pads?

My last set of race pads (Project Mu RACING777) were super rough on the rotors and they didn't wear perfectly flat (caused "record" tracks). Would slotted rotors prevent race pads from cutting groves into the rotors?
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Old 03-10-18, 06:10 PM
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No. What calipers are you running? What rotors are you running? If you are running a high quality rotor, you could switch to a pad that is easier on rotors.

I was flexing the stock calipers and getting tapered pad wear.

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Old 03-10-18, 09:34 PM
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"Record tracks" here were caused by overheating the rotors - and bad hubs - they were slotted, so doubt you'll find a difference.
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Old 03-11-18, 12:24 AM
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Originally Posted by LargeOrangeFont View Post
No. What calipers are you running? What rotors are you running? If you are running a high quality rotor, you could switch to a pad that is easier on rotors.

I was flexing the stock calipers and getting tapered pad wear.
Stock FD 16" brakes. Or their OEM equivalent.

I will be switching to a pad that is a little less aggressive. These pads were a little too strong anyway. I want something a bit more linear. Hopefully the rotors will wear a bit more even.

I just wondered if slots would help keep the pads flat, which might help keep the rotors flat.
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Old 03-12-18, 12:36 AM
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No that won’t help. It will get better when you go to a less aggressive pad. Cheap, high quality blank rotors are your best bet. No need to bother with slots or drilled.
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Old 03-12-18, 08:03 AM
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Originally Posted by LargeOrangeFont View Post
No that won’t help. It will get better when you go to a less aggressive pad. Cheap, high quality blank rotors are your best bet. No need to bother with slots or drilled.
Agreed.

The more aggressive the compound the higher temps it will raise and the stock size rotors can only dissipate as much heat before they warp.

The only thing a slotted disc would do is to get rid of excessive brake dust from the surface but nothing else in regards of more even wear or anything like that.
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Old 03-13-18, 03:51 AM
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Think I can get away with resurfacing rotors twice before I need to recycle them?

I'd like to avoid spending $300 on rotors if possible. OTOH, I can probably get away with reusing my rear rotors with new pads.
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Old 03-13-18, 12:25 PM
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IMO, spend your money on pads, not rotors. A good quality blank rotor should be fine. I occasionally freshen mine with a brake rotor hone (Flex-Hone for Rotors, Hone Tools, Flex Hones) and then do a bed-in. The pads should be matched for your heat range. Use a IR heat gun or heat tape to check what temps you are generating. Running a high heat pad cold will kill your rotors.

And FWIW, i am currently using cryogenically treated rotors. They are twice the cost, but the jury's out if they last twice as long.
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Old 03-14-18, 10:23 AM
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I am new to the RX-7 but I have experience tracking an NSX and a BMW e46, and also as brake engineer in the auto industry. As mentioned by others above, get good quality blanks and spend money on pads. One of the things that affects the braking power and wear (due to high temperature brake fade) is the cooling and the heating capacity of the rotor. Most of the times the stock brakes are powerful enough to lock up the wheels( from all accounts the rx7 as well) and the main weakness is brake fade or rotor "warping" due to operation at a high temperature range. This is where big brake kits and two piece rotors help, and to a small extent slotted rotors.
But if your on a budget, good with fabrication and want to keep the fade down, i'd suggest brake ducts and brake deflectors. They made a world of difference in the NSX once I was able to direct cold air into the rotors.
Something like this : https://www.rx7club.com/3rd-generati...brakes-958757/
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Old 03-20-18, 12:29 PM
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...and warped brakes are mostly a misnomer and is actually pad transfer

-Warped- Brake Disc and Other Myths
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Old 03-21-18, 12:27 AM
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The brakes don't have any judder, the rotors just had groves worn in them.

I had the fronts turned and reused the pads, but the same time happened again. OTOH, the pads might have already had grooves in them, which just made new groves in the rotor.
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