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      01-11-2009, 04:43 PM   #23
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Quote:
Originally Posted by Speedtrap View Post
Thanks. Is it available for the E92 M3s?
Yes, HT10s are the only race pad available for the E9X M3 as far as I know.

(E46 has every pad compound known to mankind available for it)
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      01-11-2009, 04:47 PM   #24
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Originally Posted by Radiation Joe View Post
Pagid RS19 pads are on a par with PF-01s. I think the Pagids may be more compatible with the stock pads as well. They are available for both front and rear, also. I'd go to PF-Z pads for street use if I use PF-01s on the track. PF-01s are definitely my favorites.

Regarding pad wear with stock calipers: Did you run the solid caliper bushings on your e46? They completely cure the uneven pad wear.
I did have the brass guide bushings and thought it would help. It was pretty clear they were deforming at high temps, the pad wear pattern was what you would expect given the weak areas in the caliper's design. It looked like they were spreading apart and twisting. And to be clear, this is at *extreme* loads. Stock weight, hoosiers, very fast lap times, texas summer heat.

I've never run the RS19s, but many Porsche folks I talked to have said they had trouble with them, including crumbling. I hope you are right, I am not expecting great things from the HT10s.
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      01-11-2009, 05:23 PM   #25
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Originally Posted by Dartanium View Post
I have looked at a friend's 135 M Sport and it seems their 6piston (appears to be brembo) calipers looks very promising. So if their calipers can be had for a decent price plus a set of brackets, that should be a more viable solution.
http://www.1addicts.com/forums/showthread.php?t=18646 ... I rather keep the M3 floating OEM calipers, thanks.
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      01-11-2009, 05:35 PM   #26
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Originally Posted by Technic View Post
http://www.1addicts.com/forums/showthread.php?t=18646 ... I rather keep the M3 floating OEM calipers, thanks.

If you read the entire thread it shows that the problems in those calipers were due to bad pads (custom made) that were not properly developed for the system.

That thread is an example of how quick people are to pass judgment before examining all of the facts. One person even went as far as to offer the idea of a class action lawsuit.

If it were a material or design related issue, that same result would have been seen on the tens of thousands of Porsche calipers that use the same type of ceramic piston insert.
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      01-11-2009, 06:06 PM   #27
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Originally Posted by Gary_C View Post
If you read the entire thread it shows that the problems in those calipers were due to bad pads (custom made) that were not properly developed for the system.

That thread is an example of how quick people are to pass judgment before examining all of the facts. One person even went as far as to offer the idea of a class action lawsuit.

If it were a material or design related issue, that same result would have been seen on the tens of thousands of Porsche calipers that use the same type of ceramic piston insert.
That's the reason of my post... that's what thappens when you try to be Frankestein and the same applies here... why install 135i calipers in an M3 that was not designed for them?
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      01-11-2009, 07:49 PM   #28
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Quote:
Originally Posted by jml View Post
I did have the brass guide bushings and thought it would help. It was pretty clear they were deforming at high temps, the pad wear pattern was what you would expect given the weak areas in the caliper's design. It looked like they were spreading apart and twisting. And to be clear, this is at *extreme* loads. Stock weight, hoosiers, very fast lap times, texas summer heat.

I've never run the RS19s, but many Porsche folks I talked to have said they had trouble with them, including crumbling. I hope you are right, I am not expecting great things from the HT10s.
Interesting.

Was this with PF-01s or Hawk pads or spec VRs? I was never able to get the PF-01s hot enough to fade (I did boil fluid a few times) and so my pedal pressures always stayed quite low. If you were fading the brakes or didn't have high torque pads installed, I would expect to see high pedal pressures and consequently higher stresses at the caliper. My track pads always wore quite evenly.

So I guess a conclusion could be that the stock calipers may not be sufficient for low torque pads when you stand on the pedal all the time? I remember having to really stand on it with the PF-Zs installed. Light as a feather with the PF-01s.

I've never heard of problems with RS-19s crumbling. I've experienced that with Hawk pads, though, and it is quite un-nerving when it happens going into a heavy braking zone
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      01-11-2009, 09:05 PM   #29
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Originally Posted by PunjabiM3 View Post
Probably a few years from now...
Brad from evosport says Rotora will have a 6-piston front for the stock rotors soon.
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      01-11-2009, 09:23 PM   #30
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Quote:
Originally Posted by GregW / Oregon View Post
Brad from evosport says Rotora will have a 6-piston front for the stock rotors soon.
just for the front?
that would look odd, if you had big shiny nice looking calipers in the front and the ugly black little stock ones in the back!
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      01-11-2009, 09:27 PM   #31
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Originally Posted by slammedm3 View Post
just for the front?
that would look odd, if you had big shiny nice looking calipers in the front and the ugly black little stock ones in the back!
Sorry--6-piston front, 4-piston rear.
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      01-11-2009, 09:32 PM   #32
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Quote:
Originally Posted by Radiation Joe View Post
Interesting.

Was this with PF-01s or Hawk pads or spec VRs? I was never able to get the PF-01s hot enough to fade (I did boil fluid a few times) and so my pedal pressures always stayed quite low. If you were fading the brakes or didn't have high torque pads installed, I would expect to see high pedal pressures and consequently higher stresses at the caliper. My track pads always wore quite evenly.

So I guess a conclusion could be that the stock calipers may not be sufficient for low torque pads when you stand on the pedal all the time? I remember having to really stand on it with the PF-Zs installed. Light as a feather with the PF-01s.

I've never heard of problems with RS-19s crumbling. I've experienced that with Hawk pads, though, and it is quite un-nerving when it happens going into a heavy braking zone
Mostly Spec VRs, and then later DTC70s. Neither faded - EVER, plenty of stopping power at all times. Both of those are pretty high torque pads, at the expense of durability. I never tried the PFCs, but I think cooling would ultimately have been the solution. The BBK I ended up with solved all the problems and gave me a very firm and consistent pedal in all conditions, though pretty much overkill.

I think I've been though 15 sets of DTC70s now between the OEM calipers and the BBK, they are pretty good pad at a value price (and very nice to rotors)
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      01-12-2009, 06:38 PM   #33
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Originally Posted by Technic View Post
That's the reason of my post... that's what thappens when you try to be Frankestein and the same applies here... why install 135i calipers in an M3 that was not designed for them?
My apologies.

I thought you were just saying the 135 caliper itself was the wrong way to go based on the information in that thread. I believe "Frankensteining" in general is a bad way to go. Especially with something like brakes.
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      01-12-2009, 07:46 PM   #34
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whats frankensteining?
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      01-12-2009, 07:50 PM   #35
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whats frankensteining?
probably meant "retrofitting" and piecing parts together
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