Is it better to point the airflow at the caliper or to the inside of the disc....?

I wonder if the disc is going to flow air itself with it's vane system and that helping the caliper not heat soak might be better...

Center of the rotor. Keeping the rotor cool will help keep the caliper cool as well as helping keep the hub cool, extending front hub life.

+1. Keeping the hub cool (as well as the rotor) is no joke.

depends on the rotor design. a solid rotor needs a different design then a rotor with veins. but yeah, as other said, most rotors take air from the inside so the vent should direct air to the inside of the rotor

Got the ducts installed... easy as pie. I'd post pics but they look pretty much identical to Curly's, except with NACA ducts up front.

Of course now they are saying it will be a cool and rainy weekend... so I'll probably just be taping over them anyways :facepalm:

Im going to be putting mine on but the car does not have a rain shield so guess I gotta make something to rivit my hose flange to.


so im thinking about taking air from my diebond under tray. do you guys think this will be any less affective the a front mount duct?

I have these from another project and i want to use em, not buy something new.

I have 2 of these

http://www.racerpartswholesale.com/p...41/Naca_Ducts2

Pulling air from under the car will not be as effective as pulling it from the front or sides

keep the ducts at the front. you do not want to introduce more turbulence under the car than there already is.

If you want good air flow to the brake/hub you need differential pressure. So you need a spot that is at a higher pressure than the wheel well. An inlet under the car will be dicey depending on where you place it and may actually be at low pressure if you have a splitter. In the nose is much better since the area in front of the nose is 'typically' at a much higher pressure.

Hey Josh,

About how long was each tube that you used per side. Looking to go buy some cheap ---- from ebay, but just not sure how much material I'll need.

uh, somewhere between 2 and 3 feet. Probably closer to 3. 6 should easily be enough for two if you're fairly frugal. Don't quote me on any of that though. Always buy more than you think you need.

Sounds good. I think I'll try to get 6' total.

For reference, my TSE brake duct kit came with 11' of hose. I have the ducts installed but haven't installed the hose yet, however.

I'd order at least 8 feet. You have to be able to cover extremes of wheel turn and suspension movement. It's always easier to make the hose shorter than it is to make it longer.