For the circuit car with ducting coming from the front. Usually the air flow should be aimed at the centre of the rotor so it rotates the air outwards through the internals of the rotor but with the 350 access is blocked by suspension stuff. I guess it's matter of making something up that the ducting can attach to and aiming the airflow as best as can be but easier said than done.

Any suggestions?

 

Yes- Nissan Motorsports here in the states sells a kit with 2 1/2" silicone tubing, oval vents for the bumper and brake ducts that mount to the back of the front spindle to direct air near the center of the rotor. Not sure if Nissan Oz offers anything close to that, but it should be able to be

sourced locally as well. Here's what they look like on my race Z.

 

Here is a thread I was looking at recently.

https://my350z.com/forum/brakes-and-...ing-ducts.html

I was thinking of giving it a try.

 

Won't let me upload the pictures here, but here is my build thread. Last page has pictures of everything. Cheap and effective.

https://my350z.com/forum/autocross-r...k-build-4.html

 

This one is reminiscent of the nissan designed ducts that I didn't think were available any more.

https://www.nextrevmotorsports.com/3...r100-ad001.htm

 

Thanks for the info fellas,if the backing plates can be found then they will be used as a basis to make something which directs air into the centre of the rotors. Cooling should be directed to both internal sides of the rotors otherwise the heat imbalance could result in rotor cracking?

 

Was that a question or a statement? lol

You should try to get the airflow as close as possible to the center of the rotor as opposed to being closer to the outer edges of the rotor to avoid the possibility of warping.

 

You're overthinking this: directing cool air to near the center of a spinning rotor will be sufficient to cool the entire rotor.

 

Overthinking is what I do

 

Not to be critical but what I dont like about this setup is that you are cooling only the inboard side of the rotor while the outboard side remains heated.

I appreciate the insight from DK!

 

You're right, but short of custom fabricating a slim, caliper-like duct, it would be hard to get air directed to the outside, especially with the tight confines between rotor and wheel. I wouldn't think there were be much in terms of adverse effects from not cooling the outside.