Falcon

I installed DRM's brake ducts recently.

I then noticed a problem (which I may have created myself) with them after a track day recently.

Where the plastic duct terminates the hose slips on it and is attached with a large radiator hose clamp. The problem is that when the clamp was tightened a lot, it collapsed the plastic duct and the hose slipped off.

I didn't notice this until the wheel was removed. At that point, though, the ducts haven't helped at all for brake cooling, but they have dumped a lot of air into the wheel well.

So, I thought about it a bit and came to a simple solution. (No, I didn't take the ducts off!). I bought a 3" PVC coupler, cut a 3/4" band off of it. Then I cut a 1/2" section out of the ring so that it could compress some. I slid this inside the plastic duct opening, and when it sprung open it fit the opening perfectly with the ends of the band butting against each other for compression strength.

I siliconed that in place, put the hose back on the plastic duct opening, and now I can put as much clamping force on the hose clamp as needed and I know it won't come off.

Here's what the duct opening looks like: (I had already inserted the band in it before I took the picture)



A close up:



Here it is reassembled:



Here's the sacrificial coupling:



It's amazing how much air these things flow. I put a leaf blower up to the bumper opening and a hurricane was going into the rotor.

gmccreary

Very nice redneck engineering. I want to someday build a house out of PVC.

jcsperson

Great solution. The price was right too.

eogel

Jody,

Will the silicone hold better than adding one or two screws to hold the compression ring in the DRM duct? As your competitor, it’s not that I don't want you to have cooler brakes. I just don’t want to eat the parts if they come off while I am behind you!

Ed

JeremyGSU

Cool. I have the same kit. I'd also be interested in knowing if you're using a backing plate to keep the hosing off the rotors. Mine just sits on the rotors at the end and I don't think it's as effective.

whatcop?

You could have just punched holes through and zip tied it. Holds great.

Falcon

Ed, I know you have my best interests at heart.

I thought about screws but if they came out someone is getting a flat. Once the insert is in and clamped down the chance of it it coming loose is small.

Falcon

I had a guy build me a set of ducts that attach to the spindle and put air into the center of the rotor. That duct exits right next to the rotor.

Falcon

Yep, that'd work, too.

sperkins

Looks good Jody.

I bought my ducts used and they were already collapsed from someone (not naming names Khoi) using clamps like you said. My only choice was to use screws so I did. I was concerned about them coming out too so I wrapped the whole thing with a small strip of duct tape just to be safe (no clamp). Going on 2 yrs now with no issues.

ZoomFreakinZoom

What are these brakes you speak of

VGLNTE1

John Shiels

taper the edge in the direction the air comes in. 5 minutes with a round round file does it.

I had a set and after the event the air blew in from the brakes on one side back into the plastic duct and the front 1/4 of the duct collapsed and was so severely deformed to the point of junk. Be careful how you park.

PushinTheLimit

Good work Jody... now I'm going to copy your engineering and do that to my brake ducts I noticed mine were collapsed as well after the wreck and need to be fixed up.