| Author |
Message |
    
Cherry_bomb
| | Posted on Wednesday, September 01, 2010 - 12:13 pm: | 
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if you need the best:
http://www.sicom-brakes.com/html/buell_racing.html
or this:
http://www.sicom-brakes.com/html/buell_street.html
(Message edited by cherry_bomb on September 01, 2010) |
Boogiman1981
| | Posted on Wednesday, September 01, 2010 - 01:11 pm: |
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wow that's some big $$$ |
Motorhead102482
| | Posted on Wednesday, September 01, 2010 - 03:46 pm: |
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Yeah, I'm not looking to spend 3500 Euros on carbon brakes. I definitely do not need all of that. Cool though, I didn't even know they made carbon rotors for these bikes.
I was always under the impression like Trojan stated, that wave rotors were made for racing more than looks as that they cooled faster. I'm surprised that is not the case.
Has anyone found an upgrade for the master cylinder and/or the rear caliper that will work with our bikes????
In my opinion, stopping is just as if not more important than going fast. It kind of goes along the lines of having the best tires you can for traction. |
Motorhead102482
| | Posted on Wednesday, September 01, 2010 - 03:47 pm: |
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I just want to add, I'm kind of excited I finally had a post that people were interested enough in to reply to. It's kind of discouraging when I feel like I have something really cool to show and nobody seems to care. Just my 2 cents. |
Jdugger
| | Posted on Wednesday, September 01, 2010 - 03:54 pm: |
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> I was always under the impression like Trojan stated, that wave rotors were made for
> racing more than looks as that they cooled faster. I'm surprised that is not the case.
It's entirely possible that's still the case except with THIS rotor on THIS braking system.
I made an overly general statement about wave rotors, when in truth my experience with them is limited to the Buell 1125r in track day applications, where that particular one happens to suck.
It does appear to me there's less contact area for the pad to the rotor with a wave design. Perhaps they run cooler simply because less friction is possible? |
Eaton_corners
| | Posted on Wednesday, September 01, 2010 - 10:09 pm: |
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They run cooler because the "wave" design creates more surface area to dissipate the heat. If you cut the rotor and stretched it out straight it would be longer than a typical round rotor of the same circumference. |
Jdugger
| | Posted on Wednesday, September 01, 2010 - 10:11 pm: |
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> They run cooler because the "wave" design creates more surface area to dissipate the heat.
So you are suggesting that much of the heat dissipation is done from the thin edge (non-bearing) part of the rotor?
Interesting... never thought about that as a possibility. |
Anonymous
| | Posted on Thursday, September 02, 2010 - 12:14 am: |
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Well, the wave rotors do not work on the roadrace track with fast racers. We've tried 'em and they're not even close to doing the job. For a styling exercise or a dirt bike that puts zero heat in, OK.. |
Trojan
| | Posted on Thursday, September 02, 2010 - 04:29 am: |
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What you can find when running braking wave pattern discs is that you MUST use the matching brake pads. If you fit the disc with stock pads then they will wear very quickly and will get very hot.
Brake fade due to heat is almost always caused by fluid 'boiling' rather than by pad material fading if you are using the correct pads. We used to experience all sorts of fading problems with the ZTL system regardless of disc used, but found that it improved somewhat when we changed the fluid to a race specific brake fluid. However the design of the ZTL brake makes it run much hotter than 'normal' twin discs anyway, so it will always be an issue with this system.
I was at a magazine track test of an XB12R at Bruntingthorpe airfield (basically two long straights with a bend at each end) and the stock brakes lasted less than 3 laps before the lever was back to the bar and useless. On the same day our race XB12 (with Yamaha front end and Braking discs) went all day with no brake issues  .
Ten Kate, Yamaha Italia and Yamaha Germany all have used Braking wave discs during their racing careers in WSS/WSb and have no complaints about their stopping power |
Jdugger
| | Posted on Thursday, September 02, 2010 - 07:07 am: |
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> Brake fade due to heat is almost always caused by fluid 'boiling' rather than by pad material fading if you are using the correct pads
I'll buy that!
I'm running RBF600 here. Standard DOT4 fluids fade under race conditions way too soon. But, the RBF makes a big difference. |
Eaton_corners
| | Posted on Thursday, September 02, 2010 - 03:33 pm: |
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Heat will dissipate from the edge of the rotor. Or, you might call it the non-contact area. This area of the rotor will obviously not have any heat generated by direct contact so, it can act as a heat sink similar to the fins on an air cooled engine. Also, the wave rotors may be thinner and more narrow than the stock disc making it no better or even worse for heat dissipation. The wave rotors are usually slotted instead of drilled, also for more surface area. Check out the Erik Buell Racing finned rotor (5mm) compared to the thicker 6mm race rotor.
As far as brake fade; I have heard comments about brake pads and rotor getting so hot that an air pocket develops between the pads and disc creating zero actual contact. As a former truck driver and mechanic I can tell you that not all brake systems use fluid but, all brake systems can experience brake fade. Most of these situations occur under extreme conditions and are often hard to diagnose or find a fail safe cure. |
Reepicheep
| | Posted on Thursday, September 02, 2010 - 07:01 pm: |
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I'm not aware of anything that makes an edge special. The main factors that contribute to heat dissipation are air flow, temperature differential, and surface area. So a wave rotor may have a little more surface area, but just a little. Air cooled engines have fins because they result in a multiplier of the surface area,not because they have edges. |
Jng1226
| | Posted on Thursday, September 02, 2010 - 07:46 pm: |
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Why all the speculation about what Braking's "intent" was? Here it is from the horses mouth: It is not so much the surface area of the disk which creates better stopping power. It is the efficiency in which it utilizes all the pads surface evenly, the elimination of lightening holes (for added strength) and the ability to expand and contract as it heats up without warping the disk. Simply put, these disks use all pad surfaces for maximum stopping power while remaining perfectly flat. This design is covered with an international license. |
Kenm123t
| | Posted on Friday, September 03, 2010 - 12:37 am: |
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heat disapates from leading edges at a greater rate than flat surfaces, basic heat exchanger design Depth loading of dirt pollen etc is why GE used spin fin condenser coils |
Reepicheep
| | Posted on Friday, September 03, 2010 - 08:09 am: |
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quote:heat disapates from leading edges at a greater rate than flat surfaces
Hmmm.... maybe because surface area X wrapped around a leading edge has a better average temperature gradient than surface area X that is flat? |
