Brake Cooling, best bang for the buck?

[PorscheGuy79]

Allright guys here is the deal. I have a '79 SC and I do about 4-5 DE events a year with it. I am just about to button up the suspension rebuild with Koni Adjustables on all four corners and 23/30 T-bars. When I was taking things apart I noticed that my front brake dust seals (inboard only) were toast, the same seals I had replaced not more than six months prior. I want a brake cooling kit that is effective at lower the brake temps. I dont have problems with fluid overheating, but I know im not using all of my brakes. If I have a IROC style front bumper with the brake cooling openings what would you suggest I get as far as brake cooling is concerned?

Backing plates? I heard there are types that send the air to the center and these are the best.

993 diverters? I know these are the least expensive option but my car and I are only getting faster. Would this be a waste?

[randywebb]

cut a scoop out of some heavy plastic

if that isn't enough, then feed some hoses from scoops into the center of the rotor

[Bill Verburg]

Do both a duct to the eye and the 993 diverter.

keep the duct as large as possible w/ as few bends as possible and use duct that is smooth internally.

there have been several fairly nice yet inexpensive setups posted

here's one good thread

there are many more do a search on user name "georgem"

[PorscheGuy79]

Is there a company that makes those backing plats for the center of the rotor? Are those the AJ ones?

[cgarr]

Brakes just slow ya down!

[Todd Simpson]

You can go AJ-USA for nice aluminum backing plates, OG-Racing for not as nice (but just as functional) fiberglass or the homemade variety Bill linked to. Whatever the choice do the block off plates inside as well.

That combined with one of the PVC A arm solutions (homemade again) to your front spoiler will do a nice job.

[Jay Auskin]

Matt, you're also talking about lowering your car. If that's the case, don't use the "under the a-arm" mounted cooling ducts. I ripped mine off in one day. Darn Chicago streets. I have taken my brake cooling kit off, as Bernie was going to use it. It sounds like him and Kevin are going the full upgrade route. He probably won't use them any more. You can probably buy the kit from him, and route the hoses to a front bumper cut-out or something.

[Jay Auskin]

Oh, yeah...or get R-compound tires like your dad, and just don't use the brakes

[Bill Verburg]

Originally posted by Jay Auskalnis
Matt, you're also talking about lowering your car. If that's the case, don't use the "under the a-arm" mounted cooling ducts. I ripped mine off in one day. Darn Chicago streets. I have taken my brake cooling kit off, as Bernie was going to use it. It sounds like him and Kevin are going the full upgrade route. He probably won't use them any more. You can probably buy the kit from him, and route the hoses to a front bumper cut-out or something.

That's correct, while the inder A arm scoops are cheap and easy to install they are temporary at best.

[Bill Verburg]

It's also nice to know hoew hot the rotors are getting, some heat sensotive paint is cheap and gives you some solid feedback in this regard

[edward993]

Bill, Jay,

Regarding a lowered car (my SC is pretty low), I'm thinking of putting on the 993 brake diverters. Being plastic, are those any more resiliant to impacts/ripping off than the under-arm scoops a-la AJ-USA?

Edward

[Bill Verburg]

Originally posted by edward993
Bill, Jay,

Regarding a lowered car (my SC is pretty low), I'm thinking of putting on the 993 brake diverters. Being plastic, are those any more resiliant to impacts/ripping off than the under-arm scoops a-la AJ-USA?

Edward

yes, they can bend a lot. The scoops can not.

You still need to duct to the rotor eye, as the 993 diverters only cool the inner face of the rotor.

[PorscheGuy79]

I should rephrase my question. What items/setup would give me the best overall brake cooling for a track situation?

So far I am getting...

AJ rotor backing plates (Do these focus the air to the eye?)
Ducting to the front openings
Custom make A-arm tunnels

Thats it right? I think im am complicating this too much as usual.

[ChrisBennet]

Assuming you run the same diameter tires, the under A-arm scoops aren't going to be any closer to the ground no matter how much you lower your car. I ran the the OG-racing ones on the street for years. As long as I replaced the zip ties once a year I rarely had any problems ripping them off on the street and never at the track.
The blockoff plates will lower the temp of your rotors but I've heard that they also reduce the life of your wheel bearings.
-Chris

[randywebb]

a piece of plastic that was shaped like a cam and hinged so impact would make it swing up into the empty spaces in the susp. area might be useful as a mount for the scoops...

the deflectors are fine for street use and for some track/brake setups/temperature combinations...

[edward993]

Thanks, Bill!
So what do I use to vent the eye ...the AJ plates?

Chris, makes sense (didn't think of it that way .

Edward

[Jay Auskin]

Originally posted by ChrisBennet
Assuming you run the same diameter tires, the under A-arm scoops aren't going to be any closer to the ground no matter how much you lower your car. ...

You're right, I guess I would have ripped them off even with rally ride height

[Todd Simpson]

Matthew and Edward-Yes, the AJ plates focus the air to the eye of the rotor. You also want the "block off plates" that go between the rotor and the hub. Something like $40 for 2 star shaped pieces of sheetmetal but they make sure the air you bring in goes through the vented portion of the rotor.

[PorscheGuy79]

Thanks Todd thats the answer I was looking for.

[edward993]

Indeed, thanks Todd! ...appreciate it

Edward