911 Brake Cooling Duct Rotor Plates

[Arnage]

Does anyone offer just the rotor plates/hose nipples for 911 struts. I cannot find anything other than the complete kit with the A arm intakes and hoses which I do not need. Thank you in advance for any help you can offer.

[Elombard]

Subd, I need the same thing.

I was thinking of tacking a piece of pipe onto the stock backing plate and hogging out the hole inside. Not ideal but cheap and easy? probably plenty of air for the track time I get.

Did you check AJUSA? I think they used to have them?

[wildcat077]

I had to make my own crude version due to my 996TT brakes for which nobody seemed to make a kit for ...AJusa's kit have a 6.5 inch diameter but i needed 8.5 ...
I cut out a circle out of 1/2 inch plywood and then cut a piece of .032 tin with a 1/2 inch wider diameter which i slotted approx every 2 inches, then i formed it with a hammer on the plywood jig and welded the seams where the slots were.
For extra strength i added a 1/2 inch reinforcing strip on the inside circumference because .032 is pretty thin and a real PIA to weld without burning through,then i used some 2.5 inch muffler pipe sections which i formed and welded to my backing plates after positioning everything and marking the holes for the bolts and muffler pipe .
It was a rainy day garage project which turned out pretty well !

Cheers
Phil

[Elombard]

Those came out great Phil, you should pull a FG mold off of them next time they are off....I guess thats a pretty small market. Maybe leave them blank in the middle and the 996tt guys could use them too.

[911pcars]

Originally Posted by Arnage

Does anyone offer just the rotor plates/hose nipples for 911 struts. I cannot find anything other than the complete kit with the A arm intakes and hoses which I do not need. Thank you in advance for any help you can offer.

If hoses and other ducting not desired, you could merely remove the dust shield and use a plastic 993 (?) air diverter to direct air into that area.

Ducting air to only one side of a vented rotor isn't ideal (albeit better than nothing). Someone enterprising could fabricate a more effective clam shell-type collector that sits on the periphery of the rotor to direct air to both sides.

Sherwood

[Plavan]

Simple and effective route...... Just grab 2 993 brake deflectors (~$30) Do a search on 993 Deflectors and it will show how to attach them the 911 A Arms- No need for all that work above .

I use them on my race car without any issues.

[Plavan]

lol- We were typing at the same time

[911pcars]

Originally Posted by Plavan

lol- We were typing at the same time

I type faster? 20 wpm.

[wildcat077]

Originally Posted by 911pcars

If hoses and other ducting not desired, you could merely remove the dust shield and use a plastic 993 (?) air diverter to direct air into that area.

Ducting air to only one side of a vented rotor isn't ideal (albeit better than nothing). Someone enterprising could fabricate a more effective clam shell-type collector that sits on the periphery of the rotor to direct air to both sides.

Sherwood

The air is ducted to the heart/core of the rotor,not the brake pad surface and as the rotor spins it effectively cools the whole inside surface of the core.
My rotors are 13.25 inches and the O.D of my backing plate is 8.25 so it just overlaps the outside diameter of the center core of the disc.
I tried the 993 deflectors but my car is too low and i've torn three of them off after taking on speed bumps before giving up on that idea.I was even black flagged once because the marshalls reported that something was dragging under the front of my car .The 993 plastic ducts/plates are pretty cheap at $16.00 but not really meant to be used on 911 A arms ... that's just my thoughts anyways ...

Cheers
Phil

[Trackrash]

Here is my solution. Large (3") ducts and homemade deflectors. I didn't think the 993 plastic ones for $30 each were a good option. Especially considering I would have to weld mounting tabs on my a-rms....

I drove with NASA last month at Sonoma and am happy with the results.

[kerthunk]

You can order them from Tarett, but they aren't cheap at $120 each.

Brake Cooling Backing Plate (ea)

[billjam]

Here's my version. Basically a copy of what's already out there, but homemade in fibreglass. They worked extremely well on my 930. As Kevin commented, the more air you can get into the hub of the disc the better.
That said, deflecting more air over the whole brake assembly is certainly going to help and is heaps less work than ducting it into the hub.
I used scoops under the A-arm and although they were relatively low, I never had a problem with hitting anything. I guess that's less of a problem because they are more outboard than some of the deflectors seem to be and they move up with the suspension. Or maybe I stayed on the black stuff more than others did.
Of course the other option is to duct the air from an opening in the front valance - best of both worlds.

[Elombard]

I wonder if this would be a good item for 3d printing in ABS plastic?

[billjam]

Erik, good idea, but don't forget that it gets pretty hot down there.
Radiant heat from brake disc when stopped is the problem.

[Elombard]

Yea I wondered about that but I would think ABS would be as good as FG in heat resistance?

[Trackrash]

ABS is only good for up to 176 deg F.
Polyester, (fiberglass), is good for over 400.

[Arnage]

Thanks for all the responses. I will check with Tarett. I though/was hoping maybe someone was just making the backing plates/hose nipples since so many Porsche race cars have some sort of intake on the front valance.

[Arnage]

Purchased the Tarett pieces at $120 each. Much less expensive then purchasing the kits and not using 2/3rds of the parts.

[175K911]

Todd at Helion- the guy making the CF and 'glass roof panels- has my old custom made backing plates that I'd had made for my 996TT brake conversion on my 911. He was going to take some measurements and see what would be involved in making the backing plates out of carbon fiber for stock Carrera/SC brakes, 930, and 996TT brake conversions. I'll touch base with him to see how he's coming along

[chrismorse]

Originally Posted by billjam

Here's my version. Basically a copy of what's already out there, but homemade in fibreglass. They worked extremely well on my 930. As Kevin commented, the more air you can get into the hub of the disc the better.
That said, deflecting more air over the whole brake assembly is certainly going to help and is heaps less work than ducting it into the hub.
I used scoops under the A-arm and although they were relatively low, I never had a problem with hitting anything. I guess that's less of a problem because they are more outboard than some of the deflectors seem to be and they move up with the suspension. Or maybe I stayed on the black stuff more than others did.
Of course the other option is to duct the air from an opening in the front valance - best of both worlds.

Hi Bill,

Nice attachments for the under arm scoops. I just bought the kit and was a bit underwhelmed with the tiewrap attachmnets, think I will follow suit :-)

chris