This is true to an extent. The stock brake ducts direct air from the stock lip to the wheel well. So there’s a chance these would gain some airflow from those. Definitely not as effective as a true hose duct system, but much more elegant looking than zip tying hose in the wheel well and having your tires rash up against it.


https://cimg6.ibsrv.net/gimg/www.rx7...abaec1e36.jpeg
https://cimg5.ibsrv.net/gimg/www.rx7...9e5f23e99.jpeg

Matt

😊

Keep going!

regards,
crispy

Totally agree!

My comments were more geared for track use. To get a good a good baseline, you could put the backing plate on one wheel and then take temps on both after a couple laps and see what the difference is

We were going to run one day to get baseline temps, install ducts, then run another day to measure any improvements.

But this is a MUCH better idea. :patriot:

I mean, it looks like one could home brew a duct flange for the front of those carbon ducts pretty easy, if you were so inclined. But, an option designed for a hose duct might be an excellent option with low lift. And/or, if the carbon person could make something like the corvette ducts people use, but designed for the FD, well that would just be the cat's meow.

Those look similar to the N tech backing plates and directional scoop to the rotors...or maybe I’m so old and been out of it for a while and getting the manufacturer mixed up but I have a pair on my fronts from over 15 years ago and still work great at Road Atlanta.

I think the OG manufacturer of these was CWR? (Crooked Willow Racing?)

Regardless, good to hear someone running them and have had good results.

Matt

I can confirm. The carbon fiber ducts are indeed those manufactured by Crooked Willow Racing. Some of the images are of them on my car.
regards
Crispy

These ARE indeed rebirths of the late great CWC ducts.

I think for the standard street car, it's a perfect solution. For the weekend warrior, it's far better than stock. For the track rat, it's expandable and provides a great entry point for expansion.


We'll get some tests on the sets we have here for everyone then see where the demand is. :icon_tup:

Well said. Will definitely be keeping this on my radar

Thanks for the reminder, CWR, thanks for jogging my memory! I did end up angling my bottom half of the inlet so that more air from the front bumper brake duct seems to go to it, I have one of my wheels off while I’ll replace my 99 twins and can send a picture later today showing it the cut.

I'd love to see it!

After a long period of not working on my car, I've gotten together a new set of pinch ducts that I'm running with 18x11 et52 wheels with 295 Yokohama A052's up front on my stock bodied chassis with no clearance/rubbing issues.
I designed the setup around my specific car, which doesn't have fender liners or an OEM undertray, but I'm still running the stock front ARB mounting, which the duct is zip tied to.
Ground clearance is not compromised, and the ducting shown is 3" diameter, which has proven to be sufficient for my ~2800 lbm car during track sessions at Buttonwillow/Streets of Willow springs, Chuckwalla and Fontana Infield.
The initial design is 3D printed in ABS plastic, but depending on interest, the design could be adapted for other options.

Is this something people are interested in?

Photos:
https://cimg9.ibsrv.net/gimg/www.rx7...f118dcfa28.jpg
https://cimg1.ibsrv.net/gimg/www.rx7...b6e183da7d.jpg
https://cimg2.ibsrv.net/gimg/www.rx7...e2eb4360db.jpg

Interested in the pinch ducts. I currently just route 3” hose thru there and have to deal with reduced clearance

I saw a kit somewhere that used corvette zo6 pinch ducts but now I can't find it!

I think peterhahn(spelling)talked about using the corvette ducts but that they’re huge.
I’d like to hear more about those pinch ducts

I wonder if a pair of VW pancake pipes could be modified to work. The aluminum ones were fitted to the right wheel well and are on all turbocharged Jetta's and GTI's from 99.5-2005 ( MKIV), they are very cheap used. ~3" inlet and outlet IIRC.
https://cimg3.ibsrv.net/gimg/www.rx7...4b20320813.jpg

Following this intently. With the advent of low cost 3D printing getting a good set of FD specific pinch ducts designed is looking really good.
Regards,
Crispy