Re: Please don't buy drilled rotors!!!
[Re: ntsqd]
#1676965
11/10/14 11:44 PM
11/10/14 11:44 PM
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Joined: Jan 2003
Posts: 8,016 Polson, MT
DoctorDiff
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master
Joined: Jan 2003
Posts: 8,016
Polson, MT
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My Stage 4 brake kit uses Mercedes rotors because they are the only off-the-shelf part deep enough to keep the fat calipers away from the spokes of a commonly available/reasonably priced wheel.
For some reason, Mercedes produces only ONE rotor with directional vanes. I talked to Centric about this last year at SEMA. They were getting complaints from customers about the straight vanes on their aftermarket rotors, so they recently started producing one directional rotor for both sides, just like the OEM Mercedes rotors.
Because Mercedes installs the same directional rotor on BOTH sides of the vehicle. I buy blank rotors and have them slotted (L and R), so at least they match the look of of the rear rotors.
Of course, Baer 2 piece Eradispeed rotors are also available, which almost double the cost of the brake kit.
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Re: Please don't buy drilled rotors!!!
[Re: DoctorDiff]
#1676968
11/12/14 02:43 AM
11/12/14 02:43 AM
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Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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Coleman will build any rotor you want, they make the hats and the rotors 2 piece so they can be rebuilt once they get wore out. Cost is a little more than a centric but they are an option. Tim
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Please don't buy drilled rotors!!!
[Re: the ghoul]
#1676971
11/18/14 04:50 PM
11/18/14 04:50 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Quote:
I disagree; I have run the "cheap" drilled rotors for many years on many different cars with no issues.By "cheap" I mean the auto store replacement rotors that some one has drilled in their shop. Yes I agree the serve no purpose other than look cool, yes less material means less heat disapation, and yes more surface area the greater possibility of crack nuclation.... However on the street these are vary minor inefficiencys. Even in autocross events your brakes donot get hot enough for any of this to make a difference. I have found that the pads wear excessively and the rotors start to develop un-even wear long before any material fatigue can take place..... And that's on a daily driver; so these issues will be even less evident on a "good weather" car. The quickest I have ever had a set fail was on a modern silverado I drove daily and hauled many cars/parts with. I went thru a set of ebay drilled rotors in 10k miles. Even then I blame the ceramic pads more than I do the rotors.
IMO if you like how the look go for it, if you are trying to build a "race car" you are never going to get there with ebay parts, so stop being cheap.
wow
So Professor, what is "heat disapation"?
Or "crack nuclation"?
Or this one "vary minor inefficiencys"
Kinda like a knock off professor, not the real thing but close enough for the foolish to buy.
Yeah, I know what you "meant", but if you want to be taken seriously you have to write that way, not like a beauty school drop out.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Please don't buy drilled rotors!!!
[Re: the ghoul]
#1676973
11/18/14 08:35 PM
11/18/14 08:35 PM
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Joined: Jun 2007
Posts: 2,432 NorCal
RylisPro
OP
top fuel
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OP
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Joined: Jun 2007
Posts: 2,432
NorCal
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I agree to disagree; I have no problems if a person wants to buy drilled rotors. I am happy that you are happy with your purchase. Everyone is entitled to buy whatever part they want. The issue is when it comes time for me to buy the un-drilled rotors that I want, but can't because the market is saturated with drilled rotors that I don't want, then it becomes a minor inconvenience for me. Drilled rotors are fine for the street and autocross because you don't build up heat as high when compared to driving a track day at a road course. Driving repeat extended hard laps at a road course will crack any cast iron rotor eventually, drilled or not. I already have a spare set of un-drilled rotors so... that makes me happy
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Re: Please don't buy drilled rotors!!!
[Re: the ghoul]
#1676974
11/18/14 08:40 PM
11/18/14 08:40 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
Senior Management
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Senior Management
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Posts: 28,067
Irving, TX
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I must admit that the grammatical errors push me into the "whatever" mindset too, especially considering that nucleation refers to creating a new self-organized structure.
I can tell you that the import crowd suggested that I stay away from most of the aftermarket rotors. I was looking at doing a little update on my 200 Super S and had an eye on the Lancer brakes. A coworker (runs an Evo at 180+ in the standing mile) referred me to some forums where guys complained about the budget brake rotor failures.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Please don't buy drilled rotors!!!
[Re: jcc]
#1676976
11/18/14 09:16 PM
11/18/14 09:16 PM
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Joined: Jun 2007
Posts: 2,432 NorCal
RylisPro
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OP
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Quote:
Are you inferring its the elevated temps that mainly causes the cracking cracking issue? Because I thought that cracking was related more to varying and repeated temp changes, not the ultimate temp, and if that is true, seems like street use would have more and wider temp changes then a closed circuit race track use. I'm not sure of the temp swings.
I would think most would agree a drilled rotor would crack easier then a solid rotor, and most will agreed a failed rotor when being driven/used is kinda bad, where we agree to disagree and reagree is how likely that is to happen and how much risk one is comfortable with assuming that risk.
Probably? What the heck do I know?
I drive a 40 year old Plymouth... I'm not that smart, haha!
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Re: Please don't buy drilled rotors!!!
[Re: RylisPro]
#1676977
11/19/14 12:49 AM
11/19/14 12:49 AM
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Joined: Mar 2014
Posts: 40 upper So. CA
ntsqd
member
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member
Joined: Mar 2014
Posts: 40
upper So. CA
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Holes in pretty much anything are evil stress risers, avoid them.
I know of a set of drilled rotors that didn't even make it 10k miles before cracking. Yeah, they were home drilled about 20 years ago. Don't care, no drilled for me. Those that want them know that I'm laughing at your ignorance.
I used to swerve around my hallucinations, now I drive right thru them.
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Re: Please don't buy drilled rotors!!!
[Re: ntsqd]
#1676978
11/19/14 01:14 PM
11/19/14 01:14 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
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Senior Management
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Irving, TX
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Quote:
Holes in pretty much anything are evil stress risers, avoid them.
I know of a set of drilled rotors that didn't even make it 10k miles before cracking. Yeah, they were home drilled about 20 years ago. Don't care, no drilled for me. Those that want them know that I'm laughing at your ignorance.
Now I'm laughing at your ignorance.
Holes cast into the rotor during manufacturing do not promote stress fractures. Holes drilled into rotors after casting will lead to fractures.
That's been proven through the years.
The holes provide limited outgassing, reduce weight, and save raw materials. They also look sporty to some people. That's why they get used.
Sometimes performance oriented auto manufacturers investigate things a wee bit more thoroughly than internet keyboard warriors.
Now, would you like to revise that statement?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Please don't buy drilled rotors!!!
[Re: MuuMuu101]
#1676980
11/20/14 01:51 AM
11/20/14 01:51 AM
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Joined: May 2003
Posts: 96,662 On The Boat, On The Lake, Wa. ...
amxautox
Still Retired. Still Posting on Moparts. A Lot.
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Still Retired. Still Posting on Moparts. A Lot.
Joined: May 2003
Posts: 96,662
On The Boat, On The Lake, Wa. ...
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And don't forget that when you drill, you are actually tearing the metal. That leaves stress risers all around the hole. Thus it can crack in any direction, sometimes in all directions at once.
Tom
"Everyone should believe in something; I believe I'll go fishing."
-Henry David Thoreau
Men and fish are alike. They both get into trouble when they open their mouths
author unknown
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Re: Please don't buy drilled rotors!!!
[Re: amxautox]
#1676981
11/20/14 12:03 PM
11/20/14 12:03 PM
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Joined: Dec 2003
Posts: 22,696 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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I think we are splitting hairs here, a hole, drilled or cast, is a stress riser compared to no hole, period.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Please don't buy drilled rotors!!!
[Re: jcc]
#1676982
11/20/14 04:02 PM
11/20/14 04:02 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
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Quote:
I think we are splitting hairs here, a hole, drilled or cast, is a stress riser compared to no hole, period.
The king of splitting hairs comments about others splitting hairs?
Obviously, rotors with holes are inferior to non-holed rotors. That's why you'll never see them on supercars costing hundreds of thousands of dollars.
OOPS!! I misspoke. That car cost a couple million dollars, runs 250+ mph, and has zero engineering behind it. Stupid VW! What were they thinking?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Please don't buy drilled rotors!!!
[Re: bordin34]
#1676984
11/20/14 04:18 PM
11/20/14 04:18 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
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Irving, TX
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I guess I shouldn't talk about Louis Hamilton's McLaren road car. After a robust outing at Circuit of the Americas the front brakes were toast. Those drilled ceramic rotors not only outlasted the pads, they actually ground away the pad backing plate while remaining in spec. The techs at the shop were passing around pics of the carnage. I wish I had them forward them to me.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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