Titanium Rotors eh?
10-30-11, 08:00 AM
#4
Hm. Titanium alloys have low thermal conductivity (1/2 to 1/3 of cast iron) but also about half the weight. With lots of ventilation maybe it works?
Mentioned here: (middle of page)
http://www.thebrakeman.com/rotortech
http://fsae.com/eve/forums/a/tpc/f/1.../m/30210856721
Mentioned here: (middle of page)
http://www.thebrakeman.com/rotortech
http://fsae.com/eve/forums/a/tpc/f/1.../m/30210856721
Last edited by dgeesaman; 10-30-11 at 08:05 AM.
10-30-11, 10:43 PM
#7
Senior Member
Going on a limb here.. but I imagine they are insanely expensive.
On a different note.. close friends build/designed a F500 car that has been a notable contender for many many years.. and they run 13" brake rotors up front, and a 6" on a jackshaft.
They made a set of Ti brake rotors for it.
COMPLETE FAILURE as brake rotors. Ad it turns out when under pressure and temperature there is a meqasure of lubricity inherent to Ti. And I gather they had less and less friction the harder you pressed on the brakes.
That being said.. I would think as Rotors for a 13B/20B/26B they would not only be light.. but there would be a measure of lubricity under pressure and temperature.. which would be great in cases where the rotor got too close to the housings....
I would be curious as to the expansion rate on them.. vs Iron/Steel.
On a different note.. close friends build/designed a F500 car that has been a notable contender for many many years.. and they run 13" brake rotors up front, and a 6" on a jackshaft.
They made a set of Ti brake rotors for it.
COMPLETE FAILURE as brake rotors. Ad it turns out when under pressure and temperature there is a meqasure of lubricity inherent to Ti. And I gather they had less and less friction the harder you pressed on the brakes.
That being said.. I would think as Rotors for a 13B/20B/26B they would not only be light.. but there would be a measure of lubricity under pressure and temperature.. which would be great in cases where the rotor got too close to the housings....
I would be curious as to the expansion rate on them.. vs Iron/Steel.
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10-31-11, 10:23 AM
#8
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Going on a limb here.. but I imagine they are insanely expensive.
On a different note.. close friends build/designed a F500 car that has been a notable contender for many many years.. and they run 13" brake rotors up front, and a 6" on a jackshaft.
They made a set of Ti brake rotors for it.
COMPLETE FAILURE as brake rotors. Ad it turns out when under pressure and temperature there is a meqasure of lubricity inherent to Ti. And I gather they had less and less friction the harder you pressed on the brakes.
That being said.. I would think as Rotors for a 13B/20B/26B they would not only be light.. but there would be a measure of lubricity under pressure and temperature.. which would be great in cases where the rotor got too close to the housings....
I would be curious as to the expansion rate on them.. vs Iron/Steel.
On a different note.. close friends build/designed a F500 car that has been a notable contender for many many years.. and they run 13" brake rotors up front, and a 6" on a jackshaft.
They made a set of Ti brake rotors for it.
COMPLETE FAILURE as brake rotors. Ad it turns out when under pressure and temperature there is a meqasure of lubricity inherent to Ti. And I gather they had less and less friction the harder you pressed on the brakes.
That being said.. I would think as Rotors for a 13B/20B/26B they would not only be light.. but there would be a measure of lubricity under pressure and temperature.. which would be great in cases where the rotor got too close to the housings....
I would be curious as to the expansion rate on them.. vs Iron/Steel.
10-31-11, 10:39 AM
#10
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The problem with armchair engineering whther Ti rotors will work or not is that you do not know the alloy. The characteristics of Ti alloys vary greatly from one to another and in fact are constantly evolving as high-tech industry has its way with Ti and other alloys, which was in the past difficult because the aerospace industry sucked up a huge portion of available supply. With the more modern aluminum, magnesium, as well ascomposites finding braoder use in aerospace engineering and production along with advances in machine and casting techniques, etc. the demand for Ti has "slackened" to the point that mere mortals can afford to purchase it, and manufacturers are also able to play around more with development of new alloys, coatings, etc.
11-04-11, 07:39 AM
#13
Senior Member
Toss in some Ti Stationary, and Rotor gears.. and NOW you are talking!
11-04-11, 11:33 AM
#14
Bah! And here I was thinking titanium *brake* rotors, which also exist...
I agree with the others that the right alloy is critical, and keeping therm from galling. Fortunately it seems that Ti alloys have lower thermal expansion than cast iron, so the clearances would get larger at temperature, not lower. At $1500/ea, it might be more appealing than $2500 each, but if the cheaper rotor lunches early, the savings vanish quickly. Testing, testing, testing.
David
I agree with the others that the right alloy is critical, and keeping therm from galling. Fortunately it seems that Ti alloys have lower thermal expansion than cast iron, so the clearances would get larger at temperature, not lower. At $1500/ea, it might be more appealing than $2500 each, but if the cheaper rotor lunches early, the savings vanish quickly. Testing, testing, testing.
David
11-27-11, 04:37 AM
#15
Senior Member
Isn't TI awesomely stronger than either steel or iron? AND Lighter...these rotors weigh in @ 5.5lbs = REV HAPPINESS!!
11-27-11, 07:00 AM
#16
Titanium is no stronger than steel.
Steel and Titanium are generally much stronger than cast iron.
Titanium is lighter than steel and cast iron.
Titanium is better than steel when both strength and weight are critical.
David
Steel and Titanium are generally much stronger than cast iron.
AND Lighter...these rotors weigh in @ 5.5lbs = REV HAPPINESS!!
Titanium is better than steel when both strength and weight are critical.
David
01-12-12, 11:30 PM
#17
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Titanium is hard but also very brittle....I ran a titanium exhaust on my s2000 at the track for 2 years...brittle and the metallurgy also indicates this as well, not just my experience. I am very curious to what would happen when detonation occurs.
01-13-12, 04:34 PM
#18
David
01-13-12, 09:26 PM
#19
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"Titanium" can range from hard and brittle to twice as soft as plain steel depending on the grade of alloy. The key is understanding the grade of titanium, and in the case of a welded exhaust, how to weld it. Titanium welds are easily contaminated by oxygen or nitrogen and the result is weak, brittle metal at the weld.
David
David
I would like to know what grade of titanium was used for the rotors and curious to see how it fares against detonation.
01-18-12, 10:33 PM
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I doubt the people designing those rotors are going to divulge us with the type of titanium alloy they use. We'll just have to wait and see someone rich enough to use them and see how they hold up!
03-12-12, 01:15 PM
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Looks like Mazdatrix will test these titanium rotors soon.
http://www.rx8club.com/showthread.php?t=230169
http://www.rx8club.com/showthread.php?t=230169
03-18-12, 08:11 AM
#24
Just to clear some things up. I want everyone to take note that everything about this rotor is truly revolutionary, a game changer and very innovative. The actual surface body where the compression takes place is Ti. Where the bearing is, it is freeze'd in with a cog (like how they do with thermal plugs). Furthermore, the apex seals are completely different and shaped as a spade.
If you think this is awesome, wait until Jeff comes out with his e-shaft he is working on. If you think this is awesome, you are in store for a huge surprise. Imagine a shaft that is completely set apart from all the stock ones you have seen.
If you think this is awesome, wait until Jeff comes out with his e-shaft he is working on. If you think this is awesome, you are in store for a huge surprise. Imagine a shaft that is completely set apart from all the stock ones you have seen.
