Am I screwed?

Every time I'm under my car, I try to figure out how in hell to run my brake ducting. I have the fittings on the calipers and I have the inlets to mount *somewhere* on the front of the car. I dropped a ton of money on the tubing, but where will it all fit? I have the ACD pump on one side and a Setrab on the other. I may.... MAY be able to get around the oil cooler... probably not, so it looks like I may be able to go right next to the rad support, instead, if I tweak my A/C lines over a bit (would probably have to route air from the bumper cover). Maybe. However, the ACD pump just takes up pretty much all room on the other side, so...
I'll cut holes in my bumper cover, the screens.. wherever. Has anyone found a way to route them so they are effective?
The ducting I have is 2.5" and the inlets are universal/round. The inlets and caliper ducts are part of an old AMS or Buschur kit, whoever it was that made them. The front of my car is all OEM from the crash beam to the fender liners. I'm not afraid to cut/remove anything, so let's here some reasonable ideas, please!

 

got a splitter? mount them straight into the splitter and put naca ducts off your splitter thats what we ended up doing.

I did manage to get my ducting through to the front originally but its a major mission and i dont have an ACD pump or anything as mines boot mounted

 

No splitter, yet....though I do have the wood cut. I've been slacking on making hardware to mount it to the bottom of the car. Maybe now I should get on it.

 

yea we just ducted off the splitter now. u can get thru to the front but you kind of need to use like 2 or 2.5" ducting and its a bit of a mission. basically best way is to go down and under everything but they can rub on the ground thats all

 

I thought about it. Maybe even drawing air from under (my car isn't very low). On the bright side, if the hoses rub on anything, it should just tear off without damaging much else? Theoretically...?
They would be the lowest point of my car.. which isn't bad; my lip just fits over parking blocks. I can compensate for the extra 2" (that's what she said).

 

You are talking about the bottom of the car correct? I was thinking about this but was wondering if they get the same amount of airflow compared to the front of the car. It seems a lot less complex just having NACA ducts cut into the bottom of the splitter and running at most a 2" hose. Do any of you mind sharing pics? Thanks

 

This is my current spec splitter with the ducts in it. they are open on the bottom and u just slide the ducting over them. so if the splitter comes off for whatever reason the hoses just pull off.

 

Couple more photos i found of when i used to have my ducting going to my bumper showing how i had it routed.

 

Thanks for the pics! I had a similar idea in my head just wasn't sure if they would get enough airflow from the bottom of the car but looks like it works!

 

If the splitter is working correctly, there is a ton of fast-moving air underneath.


I hope to finish my splitter in the next month or so. We'll see how it goes.
Also...keep the dust shields to help direct air flow? I'm hearing 50/50 on this.

 

I have AP 6 pots on the front so not stock but basically we have a shroud which covers around the hub and to the bottom of the disc itself with the duct blocking into this void. what u want is the airflow to channel into the center of the disc and up thru the veins inside the disc and out through the outer diameter. a full dust shield will be an issue for heat generation and i would remove it. but you also need this center piece as enclosed as you can get it. even if u just trimmed the dust shield back for now.

However on the rear discs we ditched the handbrake assembly and the dust shield and we just duct straight up into the inside middle. the rear brakes dont get as hot and we didn have overheating issues on the rear untill we put a flat floor on the car anyway.


Just make sure if ur doing off ur splitter that A, the splitter actually does something and B, that you use a nice flowing naca duct or you wont get airflow to ur brakes.

 

This is the disc/ caliper end of my ducting so you can see what i mean about the shrouds. caliper mounts to the left of the duct coming in on the 2 bolt holes facing towards the outside of the disc. the 2 holes facing towards us are the original brembo mount bolt holes where the original caliper bolts up to.

Before i went to this setup i had a duct that just picked up on the original caliper holes and u squeeze some tube down to fit in the gap between the caliper and the hub. weld it to a plate and away you go. otherwise there was some for sale floating about ive seen them on this forum before.

 

Ah. I can trim the OEM dust shield. Easy Peasy! Thanks for the info!

 

Anyone ever try to squeeze by just under the frame with a rectangular tube?
I see they have a kit for Subi that uses plastic "boxes".



I can fit a a 1.5 x 5 rect tube on the pass side at least. Should clear engine, oil cooler lines, and tire at full lock.
Not as worried about the drivers side as there is no oil cooler over there.





Would still need to make ends to convert to 3" tube, although I've only found 2" tube, backing plate, "adapters".
Is 3" even needed?

 

I have ACD on the driver's side, so not sure I could do this. Also, most people are going to 3" from what I've read, but I have 2" for mine. I figure it's better than nothing LOL