All Things Mk5 > Performance Modifications
Brake Ducts
the bruce:
Hey mate !!
Nice job, but I need to make some remarks:
1. By doing it this way you are blocking half of the area of your ducts >> a bad idea !!
2. Better fit one or two "air guides" / "deflectors" inside the inlet similar to my figure below.
3. I still believe you loose performance if you don't remove most of the brake shield (I know I'm boring).
At least the two black marked deflectors (even better add the green):
Many ducts (intakes etc.) have similar guides inside. In this windtunnel similar deflectors are used:
Pardon me, I didn't find proper pics on the web showing these deflectors in ducts and also didn't want
to take photos from Joseph Katz' "race car aerodynamics" book.
:wink:
rex:
First of all, thank you for your advice!
--- Quote from: the bruce on February 17, 2013, 11:12:12 pm ---1. By doing it this way you are blocking half of the area of your ducts >> a bad idea !!
--- End quote ---
Yes, the area where the air exists is smaller, but the same amount of air travels through there.
Because the exist is smaller than the intake, the air will travel faster through the exist.
--- Quote from: the bruce on February 17, 2013, 11:12:12 pm ---2. Better fit one or two "air guides" / "deflectors" inside the inlet similar to my figure below.
--- End quote ---
I am not sure this way really solves what I want to do... I want to direct the air towards the disc vanes / disc bell and NOT directly on the inner side of the disc.
In the case proposed by you,here is the air flow through the brake ducts:
As you can clearly see, some of the air is directed correctly and some is not directed correctly.
This is the way I am thinking of making that part:
In this case, all of the air is going where I want it to go...
--- Quote from: the bruce on February 17, 2013, 11:12:12 pm ---3. I still believe you loose performance if you don't remove most of the brake shield (I know I'm boring).
--- End quote ---
I agree, but the only reason to keep the dust/mud guard (shield) is that my car is is still a daily drive and a lot of dirt/dust will get to the discs and calipers...
Again, than you for your ideas!
:notworthy:
RENNTAG:
Like what you are doing rex :happy2:
With regards to directing the air flow to the gains I agree with rex. I think that way it will cause a high pressure and accelerate the air out towards the veins. That's my understanding anyway.
rich83:
--- Quote from: bendy on February 18, 2013, 10:39:14 am ---Like what you are doing rex :happy2:
With regards to directing the air flow to the gains I agree with rex. I think that way it will cause a high pressure and accelerate the air out towards the veins. That's my understanding anyway.
--- End quote ---
It might make the air leave the pipe quicker but it will reduce volume of air flowing out the end. Which ones most important?
rex:
Thank you very much for your thoughts guys! :notworthy:
IMO, the more air I can get into the rotor vanes and/or in the disc bell, the better. I think that directing the air away from a disc face ans into the disc bell and/or vanes makes a lot of sense. In the pictures above you will see a couple of examples...
IMO, no matter how the air gets there, the main idea it has to go out, and I will go out, mostly, through the rotor vanes thus cooling the rotor.
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