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Why Not To Use Drilled Rotors

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Old 03-14-2009, 01:22 PM
  #46  
TrackDays247.com
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Place a picture of the rotors here - let's have a looksee.

I always recommend the OEM rears because they are pretty cheap - but then you've got slotted front/holed rear which to some looks wierd. YMMV.

Post that picture and I can give 'er an assessment.
Old 03-14-2009, 06:05 PM
  #47  
mark kibort
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you dont think that a 2 piece hat has ever failed?? Im comparing an 320mm porsche hole'd rotor, with a 320mm 2 piece slottled rotor. an argument could be made both ways for safety.

those failures we have seen have lots of loose ends for reasons of their failure.
rust? driver input? pad, vibration, abs, etc etc. I would love to see more pics, but at this point, I dont think that cast hole, single block of metal, rotors are any less safe than a cheveron'ed, slotted, etc 2 piece rotor.

mk


Originally Posted by Craig - RennStore.com
Agreed. I think too much emphasis is placed upon weight,shaving a lb. here & there from the rotors with regards to aftermarket stuff -
Old 03-14-2009, 06:17 PM
  #48  
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I also wonder about wear patterns of the rotor and pad with holed rotors. you do get increased pad wear, but less taper from what i have read and seen. so many factors. I guess its one of those "depends" discussions.
Old 03-14-2009, 06:23 PM
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I even wonder with today's propensity to counterfeit everything imaginable, are yoiu sure you really got the real thing rotor? I could see some Chinese or other group attempting to sell a bunch of "discount" brand name rotors, but they aren't the real thing at all....just a thought, no evidence that's what happened here.
Old 03-14-2009, 08:43 PM
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good point. at least with my zimmerman rotors, i know they came from zimmerman. now with Porsche oem, are they porsche or some subcontractor that says they are to the spec.

Im a little nervous!

mk

Originally Posted by srf506
I even wonder with today's propensity to counterfeit everything imaginable, are yoiu sure you really got the real thing rotor? I could see some Chinese or other group attempting to sell a bunch of "discount" brand name rotors, but they aren't the real thing at all....just a thought, no evidence that's what happened here.
Old 03-15-2009, 12:52 PM
  #51  
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"Place a picture of the rotors here - let's have a looksee."
Craig,
Here is a couple pic's of my rear rotors. Maybe a dozen + DE's and 12000+ miles. Factory original's
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Old 03-15-2009, 01:10 PM
  #52  
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by the number of holes, those are big rear rotors! 320mm +


mk

Originally Posted by fjpdds
"Place a picture of the rotors here - let's have a looksee."
Craig,
Here is a couple pic's of my rear rotors. Maybe a dozen + DE's and 12000+ miles. Factory original's
Old 03-15-2009, 02:23 PM
  #53  
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Originally Posted by fjpdds
"Place a picture of the rotors here - let's have a looksee."
Craig,
Here is a couple pic's of my rear rotors. Maybe a dozen + DE's and 12000+ miles. Factory original's
If you are within the wear limits, those rotors are fine. Don't let the cracks get more than 7mm or connecting the holes.

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-td
Old 03-15-2009, 02:36 PM
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They look ok to me - td gave good advice.
Old 03-15-2009, 08:39 PM
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Thanks for the input. I have zero experience with this.
Any point in using slotted on the rear, besides the all 4 look the same?
Old 03-15-2009, 08:45 PM
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^^^^ Those are not bad at all ^^^^
Old 03-15-2009, 08:59 PM
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those look good. when the cracks met the outside edge or another hole, I would toss them. that happens 2 times a racing season, every season for the past 11 years!.
the rears never get the abuse of the fronts, so i did the "holly " rotors in the rear for looks!

mk
Old 03-21-2009, 02:46 AM
  #58  
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I just upgraded to big blacks with OEM drilled rotors. I could not find any slotted are there any available?



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