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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Apr-09-2005, 05:45:52 PM   #1
Mo_Gs
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Default CSL Bumper question - Brake cooling?

I've read dozens of postings relating to the CSL bumper and looked at a bunch of pictures, but I am still confused by one thing. Since the CSL was designed for the track, brake cooling should be an important issue. How does the CSL bumper allow for brake cooling with no duct on the right side?
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Old Sat, Apr-09-2005, 06:05:57 PM   #2
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Quote:
Originally Posted by Mo_Gs
I've read dozens of postings relating to the CSL bumper and looked at a bunch of pictures, but I am still confused by one thing. Since the CSL was designed for the track, brake cooling should be an important issue. How does the CSL bumper allow for brake cooling with no duct on the right side?
I'm pretty sure it just... doesn't. I'm also pretty sure that it doesn't on both sides-- that hole goes to the intake.

At the same time, it wouldn't surprise me if the real CSL had some other brake cooling system in place...
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Old Mon, May-16-2005, 06:58:07 PM   #3
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that's a question I've been thinking about for awhile too. I doubt the CSL has different brake cooling than the normal M3 and that might explain why alot of road testers don't like the CSL brakes after repeated use.
the brake cooling ducts are a big concern of mine since I track the car and you can never get enough cooling so removing one side of the duct would detract from getting this bumper, even though you supposedly get more downforce...

anyone thought of remolding a right side brake duct to match the left one?
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Old Mon, May-16-2005, 07:08:29 PM   #4
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if u refer to this pic.. i dont think there is any connection between the opening on the bumper and the brake ducts. this is an intake manifold.
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Old Mon, May-16-2005, 07:13:29 PM   #5
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Quote:
Originally Posted by Mo_Gs
How does the CSL bumper allow for brake cooling with no duct on the right side?
It doesn't. They use a different type of brakes for the CSL, apparantly they didn't feel the cooling ducts were necessary.
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Old Tue, May-17-2005, 03:02:43 AM   #6
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Quote:
Originally Posted by daytonaviolet
if u refer to this pic.. i dont think there is any connection between the opening on the bumper and the brake ducts. this is an intake manifold.
good pic. I guess BMW made a big mistake by not putting brake ducts in (besides much better brakes), as the brakes are the most common criticism of the CSL.
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Old Tue, May-17-2005, 08:14:43 AM   #7
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IIRC Rieger has the fake CSL front bumper with two holes molded into it...not sure what its made of of how the fit/finish are...

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Discussing CSL Bumper question - Brake cooling? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)