Who runs brake ducts for track events here? I'm piecing together a setup for my sti right now which looks like it will cost about $140 when all is said and done. How noticeable of an effect do they have? If I can get my hands on an infrared pyrometer I'd love to do some before/after testing.

-matt

I have been looking into running some brake ducting (possibly through the fog light ports, 03 wrx) and I'm interested in what your plan is and where you got your supplies from.

I have been looking into running some brake ducting (possibly through the fog light ports, 03 wrx) and I'm interested in what your plan is and where you got your supplies from.

On our USTCC car, we have two section of 3" STIFF metal dryer hose from OSH, that run straight back from the foglight holes, wind up into over the sub frame and under the engine, then make a 90deg turn to the wheel well. There we change the ducting to 3" FLEXIBLE cloth dryer hose, which connects to the caliper by a backing plate that is attach to one of the caliper bolts. Works great. We really needed them at the san jose track this weekend, which was very hard on brakes. More details on that in the up coming press release.

Chris Lock

I'm thinking about doing a hybrid of bigskywrx's and engineerx's setups http://forums.nasioc.com/forums/showthread.php?t=771013&highlight=foglight+brake+duct

They both have detailed instructions and parts lists.

-matt

blah blah blah

blah blah blah

Thanks for your outstanding contribution to this discussion.

-matt

What about those the ones on the chargespeed website that fit right into the foglight spots. I know they arent as comlex but do they provide any type of brake cooling??

As pointed out I've got some details on scoobymods on how I did mine. I go into the fog lamp. I'm running stock size brakes up front and need all the air I can get :)

I also got the 02 "brake ducts" that no longer come on the cars for some reason- to fit on my 04- little trimming here and there.

In addition, I fabbed some deflectors (stole the idea from a Mitsu EVO piece) that are mounted on my control arms- directing the air in the rear of the rotors. I've also got rid of the dust shields.

Big Sky

There we change the ducting to 3" FLEXIBLE cloth dryer hose, which connects to the caliper by a backing plate that is attach to one of the caliper bolts. Works great.

Chris - Any pictures of how things bolt up to the caliper? And why route cooling air to the caliper? I've seen that done in some racing setups, but generally only as a secondary cooling setup - the primary cooling air is routed to the center of the rotor (which is, of course, the heat sink and hence needs the cooling the most).

Pat Olsen
'97 Legacy 2.5GT sedan

Our set up ( If I evar can get a break to finish) directs air into the center of the rotor, which is the only way it will be effective).

I have put it at the top of my list for this week. I went to a party yesterday and about 5 STi guys starter chanting..." brake ducts", brake ducts,...over and over.

Myles

Chris - Any pictures of how things bolt up to the caliper? And why route cooling air to the caliper? I've seen that done in some racing setups, but generally only as a secondary cooling setup - the primary cooling air is routed to the center of the rotor (which is, of course, the heat sink and hence needs the cooling the most).

Pat Olsen
'97 Legacy 2.5GT sedan

I don't have any pics, but basically it is a custom bracket that has a tab we slide under one of the caliper bolts. The tube exits about 1.5" off the inside piston, leaving enough space for a good volume of air to pass over the caliper to the adjacent part of the rotor.

I have seen it both ways(exiting onto rotor or onto caliper) and we choose caliper. The reasons being is that the pad compound is good to up to 1550 degrees, while most fluid begins to boil in the 500 neighborhood. We have never pulled a temp off the rotor greater than 1000, but we HAVE boiled our fluid. So locating it on the caliper has been a very effective solution. Remember that the whole rotor/caliper/upright assembly is the heat sink, and when we had our ducts to the rotor, sure we got lower rotor temps, but alot of the heat dissapates into the caliper, even if the rotor is a few hundred degrees cooler.

I'd love to hear some competing theories. Always looking to improve.

We really needed them at the san jose track this weekend, which was very hard on brakes. More details on that in the up coming press release.
Chris Lock

Sorry to go off topic, but it was a blast seeing Chris in scoobie number 44 blast through the streets of San Jose in the Grand Prix. His was the only Subaru in the US Touring Car race and finished high in the top 10. Way to go Chris! My son and I were in the stands at turn 6 and cheered you on Friday through Sunday. Hope to see you there next year.

Jim

Our set up ( If I evar can get a break to finish) directs air into the center of the rotor, which is the only way it will be effective).

I have put it at the top of my list for this week. I went to a party yesterday and about 5 STi guys starter chanting..." brake ducts", brake ducts,...over and over.

Myles
I wanna see this set up once its done...
brake ducts, brake ducts

I wanna see this set up once its done...
brake ducts, brake ducts

BRAKE DUCTS
BRAKE DUCTS
BRAKE DUCTS

just kidding, take your time Myles.

-matt

Sorry to go off topic, but it was a blast seeing Chris in scoobie number 44 blast through the streets of San Jose in the Grand Prix. His was the only Subaru in the US Touring Car race and finished high in the top 10. Way to go Chris! My son and I were in the stands at turn 6 and cheered you on Friday through Sunday. Hope to see you there next year.

Jim

We actually finished 4'th. Chris is my brother and valued PR man and race engineer. Glad you came out to watch, it was nice to see so many Suby fans in the crowd. I heard, "Go Subaru!" While sitting in the pits waiting to go on track for my qualify session. It was a really great experience!

-Brian Lock

Count me in as one of the Subaru fans at the S.J.G.P. cheering you on. Great seeing you on the track. How'd the WRX handle the rail tracks? Did the car's "Rally Heritage" come in handy? :)
Those champ cars sure were catching air over the rails.