Brake ducts in R-package front lip
Only marginally effective. It's a 'better than nothing' approach. So much pressure loss before it gets to the rotor. The current C7 stingray corvette has the same thing, we're removing it all and replacing with proper brake ducts for a customer who can't get his brake temps under control with those.
-Ryan
-Ryan
here is a link to a 3D model I made of the converter part. I haven't taken final measurements and angles yet as the duct needs trimming on my car.

Took me longer to figure out how to post the image than to model the thing. This should print pretty easily in one piece. Probably a 4 hour print.
Took me longer to figure out how to post the image than to model the thing. This should print pretty easily in one piece. Probably a 4 hour print.
Last edited by Madjak; Feb 25, 2015 at 09:35 AM.
Not sure why I said "link to the 3D Model" in my post, I meant link to the 3D renders. Anyway this part needs some test fitting first so I'll do all that on my car, make sure it fits then I'll give everyone a link to the final 3D model.
My car is a 1989 Eunos Roadster which I think is the 'R package' lip. I'm not sure if there were changes or not in later models. I can make a CAD cross section to test fitment anyway.
My car is a 1989 Eunos Roadster which I think is the 'R package' lip. I'm not sure if there were changes or not in later models. I can make a CAD cross section to test fitment anyway.
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Not sure why I said "link to the 3D Model" in my post, I meant link to the 3D renders. Anyway this part needs some test fitting first so I'll do all that on my car, make sure it fits then I'll give everyone a link to the final 3D model.
My car is a 1989 Eunos Roadster which I think is the 'R package' lip. I'm not sure if there were changes or not in later models. I can make a CAD cross section to test fitment anyway.
My car is a 1989 Eunos Roadster which I think is the 'R package' lip. I'm not sure if there were changes or not in later models. I can make a CAD cross section to test fitment anyway.
I can easily scale the end connection to whatever OD is required. I think mine is actually a 3" duct but I might drop it to 2.5" for the final one as I don't need massive cooling.
I'm actually printing it a test piece now... should be done in a few hours.
aidandj, if you can send me a photo square on to the back of the duct with a tape measure held up in line with the edge, I can quickly model a version that should fit. I'll actually also need a bottom up shot as well that is square to the body so I can see the angle it comes off the bumper. Maybe give me overall height and width measurements too, preferably in mm!
I'm actually printing it a test piece now... should be done in a few hours.
aidandj, if you can send me a photo square on to the back of the duct with a tape measure held up in line with the edge, I can quickly model a version that should fit. I'll actually also need a bottom up shot as well that is square to the body so I can see the angle it comes off the bumper. Maybe give me overall height and width measurements too, preferably in mm!
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
Bitch and a half to get a good picture. Heres an album with a bunch of pictures and an attempt at a dimension. The inlets are kind of a weird shape.
http://imgur.com/a/9ZJSB
http://imgur.com/a/9ZJSB
That will do. It would be easier if you jacked up the front a bit higher! There is one good profile pic I can use, but the entrance flares a bit so might be a bit tricky to get it right from photos alone. It looks like it comes out of the bumper in the right direction so it would be a matter of just converting to the circular output.
What size output do you want? 2.5 or 3"?
What size output do you want? 2.5 or 3"?
Joined: Apr 2014
Posts: 18,643
Total Cats: 1,870
From: Beaverton, USA
That will do. It would be easier if you jacked up the front a bit higher! There is one good profile pic I can use, but the entrance flares a bit so might be a bit tricky to get it right from photos alone. It looks like it comes out of the bumper in the right direction so it would be a matter of just converting to the circular output.
What size output do you want? 2.5 or 3"?
What size output do you want? 2.5 or 3"?
both will be easy enough... The hard part will be getting it to sit over the radius flare nicely. Have you got access to a printer? I'll just have to guess model it, send you the 3D and you can feed back where it hits, maybe even tweak the 3D file at your end if you have a 3D package.
Modelled quickly over lunch. Pretty hard to see where it has to clear the bumper mount point.
here is what I got:
Here is a download for the 3D Model (in 3ds format) GV_Brake_Duct_3inch.3ds
When printing it, you may need to add some supports to where the cutout are on the model.
here is what I got:
Here is a download for the 3D Model (in 3ds format) GV_Brake_Duct_3inch.3ds
When printing it, you may need to add some supports to where the cutout are on the model.








