Brake Ducts
#1
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Brake Ducts
Because I'm not creative enough.
After searching for a while, I'm not content with what I found.
I used to have brake ducts like this
They weren't attached to the spindle, only aimed at it, but I'm pretty sure they still made a difference. I'm on 1.8 brakes with HP+ (I know these aren't track pads, now with boost I'm probably going to try out some XP10's or 12's), and I would fade badly before I put these ducts on. It is possible that its just placebo. I didn't attach them because they would get squeezed at full lock and I still DD the car. I am way too lazy to take them off/put them back on at every track day.
Now, there is an intercooler in the way, and I can't see any possible way to fit those hoses around it and the piping. However, I have an r pkg lip with those "ducts" built in. Heres the problem, which I'm sure those who have tried this know about:
Exhibit A
Exhibit B
Round hose, not round hole. I tried to fit the hose inside the duct and that looks shitty and I can't see it working that well. That would be my last resort. Theres no way to get the hose around the duct so thats out too. Does anyone have any ideas? I'm not sure if just better pads will hold up at the track (I'm on street tires-RE11's), so these ducts would inspire some confidence.
I saw this in another thread, but I have no idea how he did it.
Also, general brake ducting thread.
After searching for a while, I'm not content with what I found.
I used to have brake ducts like this
They weren't attached to the spindle, only aimed at it, but I'm pretty sure they still made a difference. I'm on 1.8 brakes with HP+ (I know these aren't track pads, now with boost I'm probably going to try out some XP10's or 12's), and I would fade badly before I put these ducts on. It is possible that its just placebo. I didn't attach them because they would get squeezed at full lock and I still DD the car. I am way too lazy to take them off/put them back on at every track day.
Now, there is an intercooler in the way, and I can't see any possible way to fit those hoses around it and the piping. However, I have an r pkg lip with those "ducts" built in. Heres the problem, which I'm sure those who have tried this know about:
Exhibit A
Exhibit B
Round hose, not round hole. I tried to fit the hose inside the duct and that looks shitty and I can't see it working that well. That would be my last resort. Theres no way to get the hose around the duct so thats out too. Does anyone have any ideas? I'm not sure if just better pads will hold up at the track (I'm on street tires-RE11's), so these ducts would inspire some confidence.
I saw this in another thread, but I have no idea how he did it.
Also, general brake ducting thread.
#4
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For mine I am going to try making the transition piece (OEM lip to round brake hose) out of kydex, which is a thermoplastic commonly used for gun holsters among other things. You can buy small sheets of it off the web. Heat it up with a heat gun and shape it how you want. I've never worked with it before but it seems doable enough.
If that doesn't work, I have a pair of small naca ducts that I bought from Pegasus because they were cheap enough. These will be Plan B though, because even the "small" naca ducts take up quite a bit of real estate in the nose of a Miata and I don't want to hack it up that much unless I really have to.
If that doesn't work, I have a pair of small naca ducts that I bought from Pegasus because they were cheap enough. These will be Plan B though, because even the "small" naca ducts take up quite a bit of real estate in the nose of a Miata and I don't want to hack it up that much unless I really have to.
#5
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Hustler shared some ideas with me about NACA ducts, I THINK I am understanding his idea correctly. I don't believe they involve hacking up the bumper. I will try some drawings on MS paint and post them here to see if they really are what hes talking about.
#7
http://www.racerpartswholesale.com/p...43/Naca_Ducts2
with carful use of heat and some cutting I was able to reshape them to fit the shape of the GV lip openings well enough. And use some black silicon to seal it a bit with pop rivets to hold them to the lip.
For single ducts you might try this
http://www.racerpartswholesale.com/p...47/Naca_Ducts2
It will take some creativity.
Bob
#8
Just get high temp duct hose with "finished ends" from McMaster Carr or your local hose & tubing supplier.
http://www.mcmaster.com/#hose-duct/=dfkkjc
No wire in the ends, they're glued on cuffs. Cut a couple of slits to fit over the stapled seams on the factory ducts and screw or pop rivet on.
http://www.mcmaster.com/#hose-duct/=dfkkjc
No wire in the ends, they're glued on cuffs. Cut a couple of slits to fit over the stapled seams on the factory ducts and screw or pop rivet on.
#9
After cooking fresh Motul brake fluid at Pacific Grand Prix (Kart Track, great for Miatas), I decided I need some brake cooling. I didn't want to spend big $$$ so I went with cheap rubber hose instead of the expensive silicone stuff. I figured that when the hose doesn't actually touch the backing plate but ends an inch or two away from it, the temps should be much lower. I verified that it actually works, I installed the ducting on the driver sides and did some back-to-back 60-0 stops and measured rotor temps, 380F on the passenger side and only 230F on the driver side.
I also ran into the problem on how to fit the hose on the odd-shaped opening on the fron lip and decided to not use it but use some generic intake duct instead. I ordered the ButlerBuilt Headlight Mount Ducts and the hose from pitstopusa for a grand total of $60. Cutting openings in the bumper seems a bit extreme, but it actually looks pretty good and works great.
The 3" hose is probably bigger than it needs to be, 2.5" wold probably be enough.
It's tight on the inside of the wheel (6UL in 15x8 with R-S3s in 225/45-15) with the intercooler piping but it all fits with no rubbing even at full lock.
I also ran into the problem on how to fit the hose on the odd-shaped opening on the fron lip and decided to not use it but use some generic intake duct instead. I ordered the ButlerBuilt Headlight Mount Ducts and the hose from pitstopusa for a grand total of $60. Cutting openings in the bumper seems a bit extreme, but it actually looks pretty good and works great.
The 3" hose is probably bigger than it needs to be, 2.5" wold probably be enough.
It's tight on the inside of the wheel (6UL in 15x8 with R-S3s in 225/45-15) with the intercooler piping but it all fits with no rubbing even at full lock.
#10
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I used 4 of these
http://www.racerpartswholesale.com/p...43/Naca_Ducts2
with carful use of heat and some cutting I was able to reshape them to fit the shape of the GV lip openings well enough. And use some black silicon to seal it a bit with pop rivets to hold them to the lip.
For single ducts you might try this
http://www.racerpartswholesale.com/p...47/Naca_Ducts2
It will take some creativity.
Bob
http://www.racerpartswholesale.com/p...43/Naca_Ducts2
with carful use of heat and some cutting I was able to reshape them to fit the shape of the GV lip openings well enough. And use some black silicon to seal it a bit with pop rivets to hold them to the lip.
For single ducts you might try this
http://www.racerpartswholesale.com/p...47/Naca_Ducts2
It will take some creativity.
Bob
#15
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The problem is any off track excursion (or even just hitting berms) would likely destroy them if they hang down any significant amount.... especially considering I have scrape marks on the bottom of my control arms.
#17
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Oh, and the EOC location is definitely not somewhere I would ever put it. Too vulnerable in that spot and no pressure differential across it.
#20
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What oil cooler are you using? I vaguely remember reading that some people with the rx7 oil coolers just stick them above the intercooler and never have oil temp problems on track. Doesn't even see direct airflow IIRC.