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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 Fri, Dec-02-2005, 02:51:16 PM   #1
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Default CSL Bumper - Add Brake Cooling?

I'm thinking about buying another lower grille to play with. I'd cut in two black port tubes (like 3" dia.) and route them to the brakes. My question is for those who have done this, is it worth it? Many threads talk about losing the brake ducts on a ZCP not being a big loss. Something like this except I would want more discrete - not silver. The existing CSL intake hole is already plumbed for only the airbox.

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Old Fri, Dec-02-2005, 04:40:10 PM   #2
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I think I read that Fern routed cooling lines from his CSL bumper with a piece of Y tubing.
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Old Fri, Dec-02-2005, 04:46:58 PM   #3
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The RRT and Bimmerworld cooling kits actually route the hoses into the belly pan towards the center of the car and then up and around to the stock ducts. I'd assume that as long as there is an opening behind the grill that you can route the hoses that it might even bet a better option using the center rather than the stock location.

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Old Fri, Dec-02-2005, 05:22:56 PM   #4
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Quote:
Originally Posted by Elmo
I think I read that Fern routed cooling lines from his CSL bumper with a piece of Y tubing.
From the lower center grill? Keep in mind the big hole on the right goes straight to my airbox - I don't want to tap anything else into it.

I'll look at the kits that route through the underpanel.
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Old Fri, Dec-02-2005, 05:27:11 PM   #5
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Quote:
Originally Posted by Hit_Apex
From the lower center grill? Keep in mind the big hole on the right goes straight to my airbox - I don't want to tap anything else into it.

I'll look at the kits that route through the underpanel.
Nope. I'm almost positive he tapped into the single hole on the drivers side.
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Old Fri, Dec-02-2005, 05:54:02 PM   #6
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Nick recently had some great advice regarding ducting (to the brakes), and it didn't involve the front bumper skirt. Instead, he proposed using the undertray as a more effective pick up point for forced air.

As you've correctly established, the single intake on the CSL is designed to feed the airbox, and not the brakes. Even on a standard M3, those lower skirt ducting ports really do little more than increase positive airflow behind the wheels. This helps, of course, but does not truly solve the problem one seeks to address with proper brake ducting.

I'd continue on with the ducting idea, but seek to rig it in a way that doesn't involve the front bumper skirt. There are a number of DIY leads out there related to this -- I think I even have a few posted on www.m3resource.com.

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Old Fri, Dec-02-2005, 06:42:37 PM   #7
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I remembered that on my evo, the holes in the sides were for intake (on the right) and cooling the oil cooler (on the left) and the undertray was designed very well on where the air flows and keeping it from lifting also. There were pathways under that directed air directly to the brakes no matter which degree the wheels were turned. I haven't gone under my m3 yet but if thats how it is also for the m3, I'm sure the regular ones on the regular bumper won't be as big of a loss.
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Old Thu, Mar-23-2006, 11:49:43 PM   #8
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Anyone have an idea what rims are on the M on the top that has the tornado grill....i know its sounds crazy since there is almost no way to tell but incase anyone know the car.
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Old Fri, Mar-24-2006, 12:35:16 AM   #9
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Quote:
Originally Posted by ///Icaris
Anyone have an idea what rims are on the M on the top that has the tornado grill....i know its sounds crazy since there is almost no way to tell but incase anyone know the car.
They are BBS Race Track LM's.


PS brake cooling, i know a CSL which runs modified Porsche GT3 RS braking ducts underneath !
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Old Fri, Mar-24-2006, 02:16:58 AM   #10
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I started a thread a while back maybe 2 months ago for this exact thing. I had links/pics/prices on that grill as well as where you could get it from. There were some good posts in that thread, might want to dig it up.
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Discussing CSL Bumper - Add 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)