Cross drilled rotors

markymarc1979 · 04-13-2008, 08:52 AM

Where can I get cross drilled rotor for my E92?

I'm only interested in the rotors, not a BBK

cipher5 · 04-13-2008, 10:19 AM

I don't think anyone makes replacements for the OEM size.

larryv · 04-13-2008, 04:24 PM

Quote:

Originally Posted by markymarc1979

Where can I get cross drilled rotor for my E92?

I'm only interested in the rotors, not a BBK

A friend of mine bought his here. brakeperformance.com Good Luck........

normtrum · 04-13-2008, 08:01 PM

DBA makes a slotted rotor....in case you're interested. They are the DBA 4000 and 5000. There is a thread on here that explains what they're all about. Tire RAck also sells them.

Sorry, but I'm not sure about drilled.

hGX2 · 04-13-2008, 11:07 PM

Quote:

Originally Posted by larryv

A friend of mine bought his here. brakeperformance.com Good Luck........

What was his review of these? Looks interesting

Amir87 · 04-13-2008, 11:56 PM

Quote:

Originally Posted by hGX2

What was his review of these? Looks interesting

+1

larryv · 04-14-2008, 05:58 PM

Quote:

Originally Posted by hGX2

What was his review of these? Looks interesting

Hey guys, the rotors are DIMPLE-DRILLED & SLOTTED he did not go with the completely drilled rotors. He has the Porterfield brake pads and loves the way they feel and look

Sorry I can't give you more info. Bottom line he loves them. Thanks

Amir87 · 04-14-2008, 08:12 PM

Those rotors looks nice!

LaYzEe · 04-15-2008, 06:19 AM

whats the real diff between cross drilled and dimple drilled?

cipher5 · 04-15-2008, 06:27 AM

Quote:

Originally Posted by LaYzEe

whats the real diff between cross drilled and dimple drilled?

The holes don't go completely through on the dimple drilled. So you still get heat dissipation similar to the cross drilled, but without sacrificing rotor strength.

uberschnell · 04-15-2008, 08:28 AM

speaking of strength, have you noticed the slots go out to the edge?

montreal_bimmer · 04-15-2008, 11:38 AM

what would be the difference between the cross drilled and dimpled drilled??? would these perform better than OEM if they are used with AXIS pads???

what do you guys think...

Amir87 · 04-15-2008, 10:21 PM

Cross-Drilled are actually drilled all the way through.

Dimpled are just indents, and the hole does not go all they way thru.

Former_Boosted_IS · 04-16-2008, 05:28 AM

Just noticed the slots go to the edge too. Any info that discusses how this affects the long term strength of the rotor?

LaYzEe · 04-17-2008, 02:20 AM

wont bmw have their own performance brake kit for the e9x just like the one series performance?

Kit523 · 04-17-2008, 02:52 AM

yes but $$$$$$$$$$

Former_Boosted_IS · 04-17-2008, 05:19 AM

BMW's rotors don't have the slot to the edge either. Maybe there is truth in that statement that it makes the rotors more prone to cracking.

TurboBullett@Ambient Thermal Management · 04-25-2008, 05:52 AM

Just installed the Rotora F&R caliper kit and DBA slotted rotor kit. I am very happy with this upgrade and the DBA rotors are actually a little lighter than stock so a welcome surprise. I will post some pics

Former_Boosted_IS · 04-25-2008, 06:12 AM

Quote:

Originally Posted by TTurboBullett

Just installed the Rotora F&R caliper kit and DBA slotted rotor kit. I am very happy with this upgrade and the DBA rotors are actually a little lighter than stock so a welcome surprise. I will post some pics

Are the DBA rotors slotted and drilled?

TurboBullett@Ambient Thermal Management · 04-25-2008, 06:38 AM

Quote:

Originally Posted by Former_Boosted_IS

Are the DBA rotors slotted and drilled?

just slotted

uberschnell · 04-25-2008, 08:23 AM

Dba rotors, Axxiss Ultimates, and stoptech ss brakelines

Icedog_16 · 04-25-2008, 08:33 AM

Slotted is the way to go. Just look at the braking systems on most race cars nowadays. Stoptech has a lot of good info on their site. Here's their take on drilled vs slotted rotors:

Quote:

DRILLED VS SLOTTED ROTORS
For many years most racing rotors were drilled. There were two reasons - the holes gave the "fireband" boundary layer of gasses and particulate matter someplace to go and the edges of the holes gave the pad a better "bite".

Unfortunately the drilled holes also reduced the thermal capacity of the discs and served as very effective "stress raisers" significantly decreasing disc life. Improvements in friction materials have pretty much made the drilled rotor a thing of the past in racing. Most racing rotors currently feature a series of tangential slots or channels that serve the same purpose without the attendant disadvantages.

http://www.stoptech.com/tech_info/wp...lections.shtml

All kinds of good info here: http://www.stoptech.com/tech_info/te...e_papers.shtml

04-13-2008, 08:52 AM	#1
markymarc1979 Banned 271 Rep 2,534 Posts Drives: 16 G12 + 15 F06 + 17 F15 Join Date: Feb 2008 Location: Oakville, Ontario iTrader: (4) Garage List 2009 BMW E93 [0.00] 2012 BMW 750xi [0.00]	Cross drilled rotors Where can I get cross drilled rotor for my E92? I'm only interested in the rotors, not a BBK
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04-13-2008, 10:19 AM	#2
cipher5 506 Rep 3,469 Posts Drives: 2020 Donington Grey X3M Comp Join Date: Jul 2007 Location: Chicago, IL iTrader: (12)	I don't think anyone makes replacements for the OEM size.
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04-13-2008, 08:01 PM	#4
normtrum Colonel 52 Rep 2,225 Posts Drives: e90 335i, e46 330i Join Date: Feb 2007 Location: PNW iTrader: (1)	DBA makes a slotted rotor....in case you're interested. They are the DBA 4000 and 5000. There is a thread on here that explains what they're all about. Tire RAck also sells them. Sorry, but I'm not sure about drilled. Attached Images __________________ 07 335i sedan \| Steptronic \| Black saphire \| Terra \| ZPP \| ZSP \| Cold Weather \| CA \| PDC \| Nav \| OEM Alarm
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04-14-2008, 08:12 PM	#8
Amir87 Gruppe Titan 262 Rep 2,839 Posts Drives: 08 E92 SG/Coral Join Date: Sep 2007 Location: NC iTrader: (37) Garage List 2008 E92 335i [10.00]	Those rotors looks nice! __________________
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04-15-2008, 06:19 AM	#9
LaYzEe Major 104 Rep 1,040 Posts Drives: AW E92 335i Join Date: Sep 2007 Location: Bay Area, Ca iTrader: (4)	whats the real diff between cross drilled and dimple drilled?
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04-15-2008, 08:28 AM	#11
uberschnell Brigadier General 675 Rep 4,080 Posts Drives: Wide Body 1 Join Date: Mar 2007 Location: Bay Area iTrader: (48)	speaking of strength, have you noticed the slots go out to the edge?
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04-15-2008, 11:38 AM	#12
montreal_bimmer OEMconcept 174 Rep 5,593 Posts Drives: BMW Join Date: Feb 2006 Location: Canada \| USA iTrader: (6) Garage List 2006 325i [10.00]	what would be the difference between the cross drilled and dimpled drilled??? would these perform better than OEM if they are used with AXIS pads??? what do you guys think...
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04-15-2008, 10:21 PM	#13
Amir87 Gruppe Titan 262 Rep 2,839 Posts Drives: 08 E92 SG/Coral Join Date: Sep 2007 Location: NC iTrader: (37) Garage List 2008 E92 335i [10.00]	Cross-Drilled are actually drilled all the way through. Dimpled are just indents, and the hole does not go all they way thru. __________________
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04-16-2008, 05:28 AM	#14
Former_Boosted_IS Major General 307 Rep 5,175 Posts Drives: 4 Wheels Join Date: Aug 2007 Location: Planet Earth! iTrader: (15)	Just noticed the slots go to the edge too. Any info that discusses how this affects the long term strength of the rotor? Last edited by Former_Boosted_IS; 04-16-2008 at 10:20 AM..
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04-17-2008, 02:20 AM	#15
LaYzEe Major 104 Rep 1,040 Posts Drives: AW E92 335i Join Date: Sep 2007 Location: Bay Area, Ca iTrader: (4)	wont bmw have their own performance brake kit for the e9x just like the one series performance?
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04-17-2008, 02:52 AM	#16
Kit523 Major General 375 Rep 7,076 Posts Drives: F80 M3/FK8/C63S Join Date: Feb 2006 Location: B.C. Vancouver iTrader: (27)	yes but $$$$$$$$$$
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04-17-2008, 05:19 AM	#17
Former_Boosted_IS Major General 307 Rep 5,175 Posts Drives: 4 Wheels Join Date: Aug 2007 Location: Planet Earth! iTrader: (15)	BMW's rotors don't have the slot to the edge either. Maybe there is truth in that statement that it makes the rotors more prone to cracking.
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04-25-2008, 05:52 AM	#18
TurboBullett@Ambient Thermal Management Major 80 Rep 1,283 Posts Drives: 2012 Abarth 500 Join Date: Jun 2007 Location: NJ iTrader: (3)	Just installed the Rotora F&R caliper kit and DBA slotted rotor kit. I am very happy with this upgrade and the DBA rotors are actually a little lighter than stock so a welcome surprise. I will post some pics
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04-25-2008, 08:23 AM	#21
uberschnell Brigadier General 675 Rep 4,080 Posts Drives: Wide Body 1 Join Date: Mar 2007 Location: Bay Area iTrader: (48)	Dba rotors, Axxiss Ultimates, and stoptech ss brakelines Attached Images
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