Brake Ducting
#12
Originally Posted by twstdmtl' date='Jan 30 2004, 12:31 PM
Maybe I don't understand what you mean but, if you cut a hole in your rotor you will have to have it rebalanced.
Also if you plumbed your duct work under your cats or anywhere near your exhaust you will be drawing in warm/hot air.
I have thought about making custom duct work for my front brakes but then some things dawned on me...
What if I am sucking up water into the duct work? Maybe not so bad, but oil and petrol would be ingested as well.
Also what if I take in small partiulate matter that is abrasive? Some of it is bound to end up in the wrong place.
Maybe these are valid maybe they are not. What do you all think?
Also if you plumbed your duct work under your cats or anywhere near your exhaust you will be drawing in warm/hot air.
I have thought about making custom duct work for my front brakes but then some things dawned on me...
What if I am sucking up water into the duct work? Maybe not so bad, but oil and petrol would be ingested as well.
Also what if I take in small partiulate matter that is abrasive? Some of it is bound to end up in the wrong place.
Maybe these are valid maybe they are not. What do you all think?
http://www.3000gtvr4.com/pages/ramair.html
At least its an idea. I was gonna go looking around and see if i could find some space in my front air dam too.
#13
Originally Posted by Baldy' date='Jan 30 2004, 01:53 PM
How effective are the stock ducts? I actually removed mine, they only seemed to funnel air to the front of the tire. Plus I don't do track time or auto-x.
#14
The stock ducts are not excellent, but don't hurt to have. Personally, I believe that air would be better used directed into a cold air box.
As for making your own, it is not as easy as putting a tube in there. If the car is street driven, then the piping has to be small enough so as to avoid being rubbed when the tire is at full lock (this isn't a problem on race cars since they are almost never at such extreme steering angles). The design of the ducting is crucial also. Air needs to be directed at the center of the rotor since vented rotors are designed to push air outward from their center. This duct should also be virtually sealed to the rotor (not sealed, but very close and has to withstand some vibrations).
The gains you'll see from putting in ducting is questionable. As I've religiously stated before (and will continue to do), the stock TII brakes are pretty outstanding with better pads and lines. Unless it is a track car (read: track, not autocross), it is unlikely you're reaching temps where the ducts would help. Autocross is (relatively) slow and quick, giving the brakes ample time to cool down between runs. Hell, a racing pad doesn't even have time to really heat up during runs so I doubt the rotors are overheating.
As for the cool factor, well, if it's done really well it could be pretty cool. But then you have to think of whether it's worth it, which in my opinion it's not. You'd be better to buy some slotted rotors to look cool (that's a whole nother can of worms there).
I wouldn't, and don't, bother.
Redwood
As for making your own, it is not as easy as putting a tube in there. If the car is street driven, then the piping has to be small enough so as to avoid being rubbed when the tire is at full lock (this isn't a problem on race cars since they are almost never at such extreme steering angles). The design of the ducting is crucial also. Air needs to be directed at the center of the rotor since vented rotors are designed to push air outward from their center. This duct should also be virtually sealed to the rotor (not sealed, but very close and has to withstand some vibrations).
The gains you'll see from putting in ducting is questionable. As I've religiously stated before (and will continue to do), the stock TII brakes are pretty outstanding with better pads and lines. Unless it is a track car (read: track, not autocross), it is unlikely you're reaching temps where the ducts would help. Autocross is (relatively) slow and quick, giving the brakes ample time to cool down between runs. Hell, a racing pad doesn't even have time to really heat up during runs so I doubt the rotors are overheating.
As for the cool factor, well, if it's done really well it could be pretty cool. But then you have to think of whether it's worth it, which in my opinion it's not. You'd be better to buy some slotted rotors to look cool (that's a whole nother can of worms there).
I wouldn't, and don't, bother.
Redwood
#16
Originally Posted by Dramon_Killer' date='Jan 18 2004, 02:08 PM
What about autox?
If your doing open track days its worth looking into other wise I think its not worth bothering with. The inportant part is doing it right.
Just make sure you bleed your brakes and have good pads like Hawks in there you'll be fine for Autocross.
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