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-   Race Prep (https://www.miataturbo.net/race-prep-75/)
-   -   Brake ducts in R-package front lip (https://www.miataturbo.net/race-prep-75/brake-ducts-r-package-front-lip-82959/)

ThePass 02-23-2015 11:24 AM

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

Madjak 02-25-2015 02:02 AM

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.

https://lastpixel.app.box.com/repres...9kik0gccv6djnk

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.

hornetball 02-25-2015 09:24 AM

No link. ??

Madjak 02-25-2015 09:36 AM


Originally Posted by hornetball (Post 1209581)
No link. ??

Fixed... gotta find an easier way to link to photos!

cyotani 02-25-2015 10:19 AM

Are those for r package or GV lip and any pics of it installed or test fitment

aidandj 02-25-2015 10:53 AM

Link to the files?

hornetball 02-25-2015 11:10 AM

That's cool. Prop+

ofspunk7 02-25-2015 01:43 PM


Originally Posted by aidandj (Post 1209611)
Link to the files?

Yeah I don't see it either.... not sure if Monk is just trolling us, or is just really really really smart. :party:

Justin case 02-25-2015 07:57 PM

That's really awesome. I would love a pair.

ofspunk7 02-25-2015 07:58 PM

Nice, i can see the pic on my phone. Maybe it was just my work PC.

Madjak 02-25-2015 08:42 PM

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.

aidandj 02-25-2015 08:43 PM


Originally Posted by Madjak (Post 1209876)
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.

I have the GV lip, if you post up the CAD files I can try and modify it to fit the GV lip.

Justin case 02-25-2015 09:12 PM

Are you designing them to have a 3'' outlet or 2.5''?

Madjak 02-25-2015 09:52 PM

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!

aidandj 02-25-2015 10:25 PM

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

Madjak 02-25-2015 10:36 PM

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"?

aidandj 02-25-2015 10:38 PM


Originally Posted by Madjak (Post 1209913)
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"?

If its not too much then one of each. Still not sure what I am going to run, and I know some of the local guys might want a set of them.

Madjak 02-25-2015 10:40 PM

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.

aidandj 02-25-2015 10:41 PM

Yeah, I have a printer at work and solidworks. I play around with it some but I'm mostly an EE guy. I can print as much as I want though.

Madjak 02-26-2015 12:00 AM

Modelled quickly over lunch. Pretty hard to see where it has to clear the bumper mount point.

here is what I got: https://lastpixel.app.box.com/repres...qrjcytnmpnmu1k

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.


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