26 Reply by jrbe (edited by jrbe 2018-05-17 07:53 AM)

  • jrbe
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Re: Brake Ducting Q: Add Duct Fans or Not?

I haven't ever tried to cut titanium. I currently work at a company with a 4kw trumpf laser, much easier to draw it in cad and ask they laser cut it for me. It's kind of like pulling teeth getting stuff cut though.
My caution is to make sure they stay in place. I'm not familiar with that caliper. Not sure how to keep it in there. If I had to cut them (without laser access) I'd probably just spend the $ on the ones made already vs making them by hand. Maybe they will cut like paper though..

Dust shield bout melting doesn't mean a whole lot besides there's likely a lot of ir heat hitting it from the rotor.

Titanium can be bought in annealed flavor. That will help be able to cut / shape it. You might be able to sandwich it between 2 pieces of aluminum to keep it from catching and wrapping around a drill bit as you make them.

If the calipers are aluminum you may want thermal shims on the non piston side as well. Might end up heating the caliper a bunch still though that side or inner and outer pads may run at very different temps.

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27 Reply by gunn (edited by gunn 2018-05-17 11:07 AM)

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Re: Brake Ducting Q: Add Duct Fans or Not?

jrbe wrote:

I haven't ever tried to cut titanium. I currently work at a company with a 4kw trumpf laser, much easier to draw it in cad and ask they laser cut it for me. It's kind of like pulling teeth getting stuff cut though.
My caution is to make sure they stay in place. I'm not familiar with that caliper. Not sure how to keep it in there. If I had to cut them (without laser access) I'd probably just spend the $ on the ones made already vs making them by hand. Maybe they will cut like paper though..

Titanium can be bought in annealed flavor. That will help be able to cut / shape it. You might be able to sandwich it between 2 pieces of aluminum to keep it from catching and wrapping around a drill bit as you make them.

If the calipers are aluminum you may want thermal shims on the non piston side as well. Might end up heating the caliper a bunch still though that side or inner and outer pads may run at very different temps.

The SN95 Cobra/Vette calipers look like this except the banjo bolt mount is on the back vs at one end. Same casting.
They are held in place by these metal pronged "crown" shapes  on the backs of each of the brake pads. Two fit into the outer caliper end and two fit into the holes in the actual pistons themselves.
http://www.gunn.com/images/myscaliper1.jpg
https://turn5.scene7.com/is/image/Turn5/53037_alt1?$mproductlarge$&wid=810&hei=608

Even if the holes in the DIY titanium shields aren't exactly the same size as the pronged crowns on the back of the brake pad, the brake pad should sandwich it in and keep it in place. The ears you see at the ends of the brake pads actually hold the caliper in to the caliper bracket; any titanium heat shield will work as long as it does NOT interfere with these ears (can be narrower).

BTW, it also sounds like a hole punch could work. I may have to play with this.
https://backpackinglight.com/forums/topic/81484/

I guess if I went the DIY route, I'l just make 4 of these cut outs.

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  • jrbe
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Re: Brake Ducting Q: Add Duct Fans or Not?

Seeing the pads and calipers this is all making a lot more sense. Diy route might not be that bad. Though punching the crown holes are probably going to be tough if you try to do them in one shot.

-Killer B's (as in rally) '84 4000Q 4.2V8. Audis never win?