When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have been using the GT3 modified rear brake scoops in my Cayman S to cool them off on track. They show from behind in one of the pictures. They work some but they are not enough to properly cool the rotors and brake calipers. I just bought some 2.5" flexible duct and two NACA ducts. I think it is going to work great. There is not much information out there so I figure to post it. I still have to clean it off better but the main idea is there. I am so surprised it is not easy to find more information on this regard. I hope this helps some of you. Overall look of it. It clears perfect my 18" track wheels feeds the air straight into the rotor inner fins which should cool a lot better. No interference with moving suspension parts Nice placement next to the air duct for the transmission cooler. I may play with this more if needed 4 clamps, 2 NACA ducts and 8 ft of flexible high temp brake duct
I am guessing this is a new installation and you have not run the car with that mounting on the brake dust shield? Those wire ties are going to shred the duct. You will be amazed at how much vibration, flex, movement the car has under load. Keep a close eye on this when you do eventually do get to the track as this is not going to last. As Matt has shown in his pictures, you need an inside diameter tube to hose clamp the duct to. If I recall, my mechanic riveted a piece to the shield - not as slick as Matt's setup, but it works until you do a little off-roading and rip the naca duct and hose off the car...
This is and looks a lot better. Again, thanks for all the help and input.
PS. It looks like it is cracked but it is only pad marks. This car needs to run free soon at the track.
Looks good, well done. I have to replace my hoses every year or two from normal wear and/or the inevitable offroad excursion so I would check them whenever you have the wheels off replacing pads/rotors.
Where did did you source the naca ducts and hose from?
Originally Posted by u00art3
I have been using the GT3 modified rear brake scoops in my Cayman S to cool them off on track. They show from behind in one of the pictures. They work some but they are not enough to properly cool the rotors and brake calipers. I just bought some 2.5" flexible duct and two NACA ducts. I think it is going to work great. There is not much information out there so I figure to post it. I still have to clean it off better but the main idea is there. I am so surprised it is not easy to find more information on this regard. I hope this helps some of you. Overall look of it. It clears perfect my 18" track wheels feeds the air straight into the rotor inner fins which should cool a lot better. No interference with moving suspension parts Nice placement next to the air duct for the transmission cooler. I may play with this more if needed 4 clamps, 2 NACA ducts and 8 ft of flexible high temp brake duct
Its amazing what you can do with some hose and some patience. I have three hoses feeding my rear brakes, and two on the front. My suggestion would be to use hose where the width between the wire coils is 3/8", and use extra wide zip ties. The coils inside the hose support the zip ties and keep the hose from collapsing and shutting off air feed. And with enough thought, you can locate the hoses really well using only zip ties, and not expose anything to the perils of steel band clamps should you run over something or have an off. Like others have said, these hoses are wear items and need to be checked/replaced repeatedly.
04-27-2020, 09:28 PM
987.2 custom rear brake ducts
