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Board index » 1997-2008 Grand Prix Discussion » Suspension, Brakes, Wheels and Tires

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Malefic_GP
PostPosted: Fri Jul 11, 2008 3:24 pm 
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Where can I get Slotted and drilled rotors? I've already looked in the usual vendors we have, but they don't carry any. 3800Performance, ZZP, & WBS.

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hotrodolds
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VictorSmalls
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rotorpros.com

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my04gt
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check out ebay
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chethammer
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I'll post the link since I bought them from this guy and so did Don. I'm very satisfied with the performance.

http://cgi.ebay.com/ebaymotors/ws/eBayI ... 07827&rd=1

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pontiacking
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PostPosted: Fri Jul 11, 2008 8:57 pm 
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VictorSmalls wrote:
rotorpros.com


X2 Great service, price, and quality.

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Don_Rome
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PostPosted: Sat Jul 12, 2008 11:08 am 
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Don't get drilled rotors, the metal can stress crack around the holes. Slotted only are the way to go.

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Malefic_GP
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PostPosted: Sat Jul 12, 2008 2:03 pm 
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Don_Rome wrote:
Don't get drilled rotors, the metal can stress crack around the holes. Slotted only are the way to go.


I'll search into the problem. I was thinking of getting these...

http://store.r1concepts.com/Items/Item. ... e%20Rotors

They are going to run me an est. $300 for all four.

>>Edit<<

Ok some I did a quick google search and found a thread on another fourm talking about it.

Quote:
That article is exactly right, however I have never seen nor heard of anyones crossdrilled and slotted rotors crack like the images they show'd. (everyone on my porsche forums does some sort of racing) I think the cracking is more of a myth or more previlant in cheaper rotors.
It's no myth...i've seen several examples on my LSX forums of drilled rotors developing little cracks around the holes. And these are quality parts, nothing "DIY". The fact of the matter is, you can't get any benefit out of it on the street so just don't do it. Unless of course you like the looks, and are willing to deal with the consequences such as cracking and eating your brake pads like a cheese grater.


I'm going to continue search why it cracks and see what I find. All I keep on finding are people who argue about weather if it's a myth or not. but, they also side with my thought that it's a fashionable mod to add to the car.

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Don_Rome
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When the metal is drilled, it fatigues the molecules around the holes. When the rotors are constantly heated & cooled, the metal fractures, which causes it to crack. I know all about metal properties because I'm a tool & die maker, so this is not just something I'm making up.

If the holes are cast into the rotor when it's manufactured (like on the GP GXP) the metal isn't fatigued so it won't crack. But this type of rotor is very expensive, so most people buy the drilled rotors. The holes don't do anything anyway, they are just there for looks. The slots clean the pads which keeps fresh material exposed for maximum braking performance.

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04FusionGT
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PostPosted: Sat Jul 12, 2008 3:13 pm 
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chet, which way did u go? just slotted or drilled & slotted?

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stkks
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PostPosted: Sat Jul 12, 2008 3:51 pm 
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Don_Rome wrote:
When the metal is drilled, it fatigues the molecules around the holes. When the rotors are constantly heated & cooled, the metal fractures, which causes it to crack. I know all about metal properties because I'm a tool & die maker, so this is not just something I'm making up.

If the holes are cast into the rotor when it's manufactured (like on the GP GXP) the metal isn't fatigued so it won't crack. But this type of rotor is very expensive, so most people buy the drilled rotors. The holes don't do anything anyway, they are just there for looks. The slots clean the pads which keeps fresh material exposed for maximum braking performance.


That's why I went with slotted/dimpled. This way you still get the looks of drilled rotors, but no chance of stress cracks. I also got my rotors through rotorpros.com.

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BigManAndy
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PostPosted: Sat Jul 12, 2008 3:56 pm 
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^^^ any on car pics of those slotted dimpled by any chance?

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Don_Rome
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PostPosted: Sat Jul 12, 2008 3:59 pm 
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If you want the look of drilled rotors get the dimpled ones like STKKS did, then they won't stress crack.

Andy here's some pics of STKKS dimpled rotors:
http://www.gpona.com/forums/viewtopic.p ... ght=#72688

And another with my slotted rotors further down:
http://www.gpona.com/forums/viewtopic.p ... ght=#70595

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hotrodolds
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PostPosted: Sat Jul 12, 2008 4:36 pm 
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Dimpled rotors will still stress crack. I had EBC rotors and they did the stress crack thing. I THINK I still have pics of 'em.

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VictorSmalls
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PostPosted: Sat Jul 12, 2008 4:46 pm 
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2 years and 60k on drilled/slotted and no problems here.

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Don_Rome
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PostPosted: Sat Jul 12, 2008 5:58 pm 
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Dave that's really good, and I know you're hard on your brakes when you're Autocrossing.

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Malefic_GP
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PostPosted: Sat Jul 12, 2008 10:07 pm 
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VictorSmalls wrote:
2 years and 60k on drilled/slotted and no problems here.


....which rotors and where did you get them? Rotorpros.com?
60K miles for me would take me maybe 8 years if I keep up with my usual routine, got my car in 04 and it only has 39,000.

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VictorSmalls
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PostPosted: Sat Jul 12, 2008 10:09 pm 
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Mine are from Rotorpros.com and are Fbody swapped fronts and standard GP rears.

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they
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PostPosted: Sun Jul 13, 2008 1:16 pm 
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ebay ftw

very happy with my rotors

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z3r0
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PostPosted: Sun Jul 13, 2008 1:20 pm 
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i had r1concepts please dont buy from them, they ripped me off on price and when put on teh car was found they were warped even b4 being on teh car

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stkks
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PostPosted: Sun Jul 13, 2008 4:22 pm 
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Don_Rome wrote:
If you want the look of drilled rotors get the dimpled ones like STKKS did, then they won't stress crack.

Andy here's some pics of STKKS dimpled rotors:
http://www.gpona.com/forums/viewtopic.p ... ght=#72688

And another with my slotted rotors further down:
http://www.gpona.com/forums/viewtopic.p ... ght=#70595


Thanks Don for hooking Andy up with the link to my rotors.

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Don_Rome
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PostPosted: Sun Jul 13, 2008 4:24 pm 
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You betcha Laura

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rocket69GTP
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PostPosted: Wed Jul 16, 2008 8:33 pm 
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Hey Malefic, try this website with the Baer decelarotors.

http://www.gravanatuning.com/1426/3/121 ... _3.8_.html

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chethammer
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I got drilled and slotted. So far no problems at all. I look at them everyday too. I wonder if the cracking might have something to do with the type of pad used?

By the way the Raybestos pads are really nice!

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Malefic_GP
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rocket69GTP wrote:
Hey Malefic, try this website with the Baer decelarotors.

http://www.gravanatuning.com/1426/3/121 ... _3.8_.html


........................................................................ I found a six piston brake system ?!?!?!?! For quote: $2,995.00 and a Savings of : $421.67 from the original price

http://www.gravanatuning.com/1430/3/116 ... _3.8_.html

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Last edited by Malefic_GP on Thu Jul 17, 2008 3:43 pm, edited 1 time in total.

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