apex gt4 brake duct install

MaxL · 10-28-2011, 09:53 AM

Quote:

Originally Posted by chriszeh

iTs addressed in this thread. My intention from the start was to create the system in 2 parts, from the undertray to the inner fender, and from the inner fender to the backing plates. If it was all one system my brakes would work like crap in the winter because couldn't generate any heat and I wouldn't stop. This way I can remove the second section for winter and non track use. I have the parts to complete the system but am going to run as is first and may not run the second half if it isn't needed.

Got it. Please post the second part design/pics once it's done. The first part looks good and cost-efficient.

1MOREMOD · 10-28-2011, 09:54 AM

Thanks.

veightkiller · 10-28-2011, 11:17 PM

Looks good man, nicely done.

aus · 11-03-2011, 07:31 PM

Great job. Thanks.
Any pics of the tubing from the under tray to the fender liner? Was that short run in the pic all you needed?

1MOREMOD · 11-03-2011, 08:26 PM

Quote:

Originally Posted by aus

Great job. Thanks.
Any pics of the tubing from the under tray to the fender liner? Was that short run in the pic all you needed?

yep its a pretty short piece needed. i used about 1 and a 1/2 feet long or so but the distance is shorter than that just the turns in there wanted a little extra. if you look at the picture of the undertray the tubing exit in the fender liner is just passed the point where it passes through the hangers. the lower bolt in the fender well goes in the inner most tab on the undertray in that picture.

Ateam · 11-04-2011, 02:04 AM

OEM rotors do not need any heat to "work" The colder the better for stock rotors as heat will obviously cause them to not work. A tiny air duct into the brakes will do nothing as far as making it "too cold" So if anyone else is considering this I do not think that two-part system is at all necessary. Only certain racing brake setups made of carbon require heating up. Steel rotors require absolutely no heat to work perfectly

1MOREMOD · 11-04-2011, 09:11 PM

The system may be run in the future on a bbk, running both parts would limit my turning radius and be a pain for regular street driving as it is 3 inch where most are 2.5. The 3 inch duct will provide a 50 percent increase in air flow compared to a 2.5 inch duct so should give some significant cooling.

STALKER · 11-05-2011, 10:32 AM

Great work!!
Looking forward to hearing your full review out on track.
I wonder how much more cooling the brakes effectively get without the backing plates??

1MOREMOD · 11-06-2011, 07:50 PM

Quote:

Originally Posted by STALKER

Great work!!
Looking forward to hearing your full review out on track.
I wonder how much more cooling the brakes effectively get without the backing plates??

Not sure, figured it couldn't hurt. Ran today at the track. Moring temps were much cooler than usual ended up about 50 out. I usually have to set my front starting pressure lower than my rears to achieve good hot pressure of 40. Today set my fronts at 33 like usual and they weren't getting up to full pressure so the ducts were cooling my fronts. Not definitive evidence but seems the ducts cooled my tires quite a bit, hopefully did the same for rotors.

1MOREMOD · 04-04-2012, 12:37 AM

update. seems to be working well. also ended up removing the dust shields so the air flow has a direct path to the back side of the rotors for better cooling. still no warm track days so hard to say but im pleased with the outcome.

edwinm3 · 04-11-2012, 04:50 PM

good work

Kunman · 04-28-2014, 09:08 AM

very nice

Sleeper519 · 04-29-2014, 08:47 PM

Chris, any further update on this? on whether its providing any noticeable cooling? decrease brake fade? increase brake pad life?...

I'm thinking about doing the ducts to the inner fender well like you did because I need SOME air flow thru there, brakes just getting way too hot now. I know some folks say that it is prob ineffective but I really don't want to run the tubing to the backing plates and have it bind in the suspension arms or interfere with my DD turning range, etc.

1MOREMOD · 04-29-2014, 09:54 PM

Quote:

Originally Posted by Sleeper519

Chris, any further update on this? on whether its providing any noticeable cooling? decrease brake fade? increase brake pad life?...

I'm thinking about doing the ducts to the inner fender well like you did because I need SOME air flow thru there, brakes just getting way too hot now. I know some folks say that it is prob ineffective but I really don't want to run the tubing to the backing plates and have it bind in the suspension arms or interfere with my DD turning range, etc.

Don't have the car anymore and ripped the tubing off the first track day with it run to the backing plates.

Sleeper519 · 04-30-2014, 08:12 AM

Quote:

Originally Posted by 1MOREMOD

Don't have the car anymore and ripped the tubing off the first track day with it run to the backing plates.

Good answer, my point exactly...

1MOREMOD · 04-30-2014, 08:22 AM

Quote:

Originally Posted by Sleeper519

Good answer, my point exactly...

Glad I could help! To be fair I had a big off that caused that and was running 3 inch tubing which doesn't work well at all.

10-28-2011, 09:54 AM	#24
1MOREMOD - 11817 Rep 23,187 Posts Drives: Race car-> Join Date: Mar 2009 Location: check your mirrors iTrader: (5)	Thanks. __________________ 02 Tiag e46 M3\|6MT\|GC plates\|MCS c.o.\|GC bars\|GC race control arms\|GC bushings\|BW eng. & tran. mounts\|subframe kit\|BW race shifter\|BW Jaffster\|Euro header\|BW exhaust\|K&N c.a.i.\|Epic race tune\|Rouge pulleys\|Seibon CF hood\|CSL bumper\|apr gt 250 & splitter\|ST-40\|XR-2\|SS lines\|half cage\|Recaro profi\|Profi 2 harness\|BMWpedals\|BW studs\|
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10-28-2011, 11:17 PM	#25
veightkiller Brigadier General 61 Rep 4,150 Posts Drives: e90 335i Join Date: Dec 2007 Location: Vancouver,B.C iTrader: (3)	Looks good man, nicely done.
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11-03-2011, 07:31 PM	#26
aus Major General 890 Rep 9,031 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Great job. Thanks. Any pics of the tubing from the under tray to the fender liner? Was that short run in the pic all you needed? __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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11-04-2011, 02:04 AM	#28
Ateam Banned 88 Rep 1,105 Posts Drives: M3 Join Date: Sep 2011 Location: USA iTrader: (0)	OEM rotors do not need any heat to "work" The colder the better for stock rotors as heat will obviously cause them to not work. A tiny air duct into the brakes will do nothing as far as making it "too cold" So if anyone else is considering this I do not think that two-part system is at all necessary. Only certain racing brake setups made of carbon require heating up. Steel rotors require absolutely no heat to work perfectly
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11-04-2011, 09:11 PM	#29
1MOREMOD - 11817 Rep 23,187 Posts Drives: Race car-> Join Date: Mar 2009 Location: check your mirrors iTrader: (5)	The system may be run in the future on a bbk, running both parts would limit my turning radius and be a pain for regular street driving as it is 3 inch where most are 2.5. The 3 inch duct will provide a 50 percent increase in air flow compared to a 2.5 inch duct so should give some significant cooling. __________________ 02 Tiag e46 M3\|6MT\|GC plates\|MCS c.o.\|GC bars\|GC race control arms\|GC bushings\|BW eng. & tran. mounts\|subframe kit\|BW race shifter\|BW Jaffster\|Euro header\|BW exhaust\|K&N c.a.i.\|Epic race tune\|Rouge pulleys\|Seibon CF hood\|CSL bumper\|apr gt 250 & splitter\|ST-40\|XR-2\|SS lines\|half cage\|Recaro profi\|Profi 2 harness\|BMWpedals\|BW studs\| Last edited by 1MOREMOD; 11-04-2011 at 09:41 PM..
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11-05-2011, 10:32 AM	#30
STALKER Brigadier General 169 Rep 3,831 Posts Drives: 997.2 GT3, Golf R Join Date: Feb 2009 Location: Toronto, ON iTrader: (5)	Great work!! Looking forward to hearing your full review out on track. I wonder how much more cooling the brakes effectively get without the backing plates?? __________________
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04-04-2012, 12:37 AM	#32
1MOREMOD - 11817 Rep 23,187 Posts Drives: Race car-> Join Date: Mar 2009 Location: check your mirrors iTrader: (5)	update. seems to be working well. also ended up removing the dust shields so the air flow has a direct path to the back side of the rotors for better cooling. still no warm track days so hard to say but im pleased with the outcome. __________________ 02 Tiag e46 M3\|6MT\|GC plates\|MCS c.o.\|GC bars\|GC race control arms\|GC bushings\|BW eng. & tran. mounts\|subframe kit\|BW race shifter\|BW Jaffster\|Euro header\|BW exhaust\|K&N c.a.i.\|Epic race tune\|Rouge pulleys\|Seibon CF hood\|CSL bumper\|apr gt 250 & splitter\|ST-40\|XR-2\|SS lines\|half cage\|Recaro profi\|Profi 2 harness\|BMWpedals\|BW studs\|
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04-11-2012, 04:50 PM	#33
edwinm3 Brigadier General 974 Rep 3,998 Posts Drives: F82 Join Date: Nov 2011 Location: Broward iTrader: (32)	good work __________________ Grigio Telesto M4, 6MT. Coyote 5.0 F-150 991 GT3
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04-28-2014, 09:08 AM	#34
Kunman First Lieutenant 26 Rep 328 Posts Drives: m3 Join Date: Jun 2013 Location: Canada iTrader: (0)	very nice
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04-29-2014, 08:47 PM	#35
Sleeper519 Captain 68 Rep 869 Posts Drives: 08 E92 M3 DCT Join Date: Nov 2009 Location: Atlanta, GA iTrader: (0)	Chris, any further update on this? on whether its providing any noticeable cooling? decrease brake fade? increase brake pad life?... I'm thinking about doing the ducts to the inner fender well like you did because I need SOME air flow thru there, brakes just getting way too hot now. I know some folks say that it is prob ineffective but I really don't want to run the tubing to the backing plates and have it bind in the suspension arms or interfere with my DD turning range, etc. __________________ 2008 M3 Coupe / DCT // StopTech BBK 380/355 / Pagid RS29 / Motul / Apex Arc-8 / BFG R1S / Ground Control / MS filter / Performance spoiler / BPM tune // Road Atlanta 1:39.70 / VIR Full 2:10.87 / Barber 1:42.20
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