2 piece direct replacement rotors in development?

lucid · 05-26-2009, 08:52 PM

Is anyone aware of any 2 piece direct replacement rotors in development for the E9X M3? Currently, our only option is the stock rotors.

Radiation Joe · 05-26-2009, 09:28 PM

Don't know but assume Performance Friction will supply a superior replacement rotor for the e9x M3.

James????

KINGLEH · 05-27-2009, 12:57 AM

i think the stock rotors are actually pretty nice pieces... the caliper is the problem....

Green///Hell · 05-27-2009, 01:51 AM

Yeah, the rotors aren't bad and the cooling isn't generally all that bad its more an airflow problem

Back in the E46 days PFC rotors were just fine without having to go BBK. That was the best bang for the buck in stopping power at the track for the dollar. Maybe a PFC larger rotor and new bracket would help with the cooling some

lucid · 05-27-2009, 07:38 AM

My stock are rotors are cracking big time, and airflow through the vents is limited due to their construction. I want to see if a quality aftermarket rotor set might last longer and run cooler.

Radiation Joe · 05-27-2009, 08:31 AM

Quote:

Originally Posted by KINGLEH

i think the stock rotors are actually pretty nice pieces... the caliper is the problem....

The stock rotors are a very nice design, but I don't think they are the best from a cooling standpoint. Audi and BMW designs are very similar.

Take a look at this thread.

lucid · 05-27-2009, 09:14 AM

Quote:

Originally Posted by Radiation Joe

The stock rotors are a very nice design, but I don't think they are the best from a cooling standpoint.

I was spoke with Dave Zackhausen the other week (very informative guy), and he pretty much said the same thing when I asked about why Stoptech rotors might offer better cooling than stock rotors. That the connection method between the hat and the rotor limit airflow in the stock setup (I assume it is cheaper to manufacture though). Also, aftermarket rotors might have more effective vent geometries (which might also be more expensive to manufacture/cast, etc).

bigjae1976 · 05-27-2009, 10:23 PM

Aren't the OEM rotors a floating design like the ST/Brembo rotors? IIRC, the hat is aluminum and the the disc is joined to the hat with some aluminum rods. I think there was a picture in the M3 brochure.

Some nice OEM slotted replacements would be nice!

doba_s · 05-28-2009, 10:24 AM

What do you guys think about Girodisc ?

It looks like they make a good quality rotors ... many porsche guys using them and it looks like they have rotors for e46 m3 ... but nothing yet for e92

http://www.girodisc.com/catalog/prod...roducts_id=615

05-26-2009, 08:52 PM	#1
lucid Major General 374 Rep 8,033 Posts Drives: E30 M3; Expedition Join Date: Apr 2007 Location: USA iTrader: (0)	2 piece direct replacement rotors in development? Is anyone aware of any 2 piece direct replacement rotors in development for the E9X M3? Currently, our only option is the stock rotors. __________________
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05-26-2009, 09:28 PM	#2
Radiation Joe Veni Vidi Vici 89 Rep 2,750 Posts Drives: '11 JB/BBe-6sp-e90 Join Date: Jul 2008 Location: Macungie PA iTrader: (0) Garage List 2011 e90 M3-Sold [8.50] 2003 RS6 - Sold [0.00] 2009 e90 M3 - Gone [0.00] 2003 M3 SOLD [0.00] old 2002 [10.00]	Don't know but assume Performance Friction will supply a superior replacement rotor for the e9x M3. James????
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05-27-2009, 12:57 AM	#3
KINGLEH Major 98 Rep 1,043 Posts Drives: 00 GTR - 09 E92 M Join Date: Apr 2008 Location: Charleston, SC iTrader: (1)	i think the stock rotors are actually pretty nice pieces... the caliper is the problem....
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05-27-2009, 01:51 AM	#4
Green///Hell Colonel 183 Rep 2,872 Posts Drives: 991 GT3, F15 X5, 1199S Join Date: Feb 2009 Location: Chicago iTrader: (5)	Yeah, the rotors aren't bad and the cooling isn't generally all that bad its more an airflow problem Back in the E46 days PFC rotors were just fine without having to go BBK. That was the best bang for the buck in stopping power at the track for the dollar. Maybe a PFC larger rotor and new bracket would help with the cooling some
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05-27-2009, 07:38 AM	#5
lucid Major General 374 Rep 8,033 Posts Drives: E30 M3; Expedition Join Date: Apr 2007 Location: USA iTrader: (0)	My stock are rotors are cracking big time, and airflow through the vents is limited due to their construction. I want to see if a quality aftermarket rotor set might last longer and run cooler. __________________
	Appreciate 0 Quote

05-27-2009, 10:23 PM	#8
bigjae1976 Major General 1571 Rep 8,076 Posts Drives: 11 E90 M3 Individual Join Date: Mar 2006 Location: Houston, TX iTrader: (22) Garage List 2004 BMW M3 [4.50] 2011 BMW E90 M3 [5.25] 2013 BMW 328i [5.00]	Aren't the OEM rotors a floating design like the ST/Brembo rotors? IIRC, the hat is aluminum and the the disc is joined to the hat with some aluminum rods. I think there was a picture in the M3 brochure. Some nice OEM slotted replacements would be nice! __________________ 2018 F30 320iX Melbourne Red 2011 E90 M3 Monte Carlo Blue 2004 E46 M3 Imola Red 2000 E36/7 Z3 Steel Blue
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05-28-2009, 10:24 AM	#9
doba_s Major General 405 Rep 6,107 Posts Drives: X7 l Cayenne l 997.2RS Join Date: Sep 2006 Location: Danville iTrader: (26)	What do you guys think about Girodisc ? It looks like they make a good quality rotors ... many porsche guys using them and it looks like they have rotors for e46 m3 ... but nothing yet for e92 http://www.girodisc.com/catalog/prod...roducts_id=615
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