Originally Posted by OSMrally Trust me, I had my doubts as well. I should probably clarify a bit, on the track my white wheels turn to grey in something less
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01-05-2019, 12:06 PM | #1 (permalink) | |
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I have done a bit of research on these"track day SPEC" pads with the PSA part numbers these past couple days. They seem to be very well liked by the Vette community who tracks their cars and also has a few threads with great feedback from s2ki and f80 m3 forums. Will from THmotorsport even made a post stating that the fade resistance and pedal feel is very similar to an xp10 in his own experience. Seems to be a pretty solid product from what I can tell. I've actually reached out to powerstop and asked for a mu vs temperature chart to see the characteristics of this compound. The rep told me my email has been forwarded to the product manager so I'm still waiting for that to come in. $165 for four corners is a crazy price. I'm 80% sure I'll end up buying these, I'll be sure to report back after tracking them. |
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01-05-2019, 08:28 PM | #2 (permalink) |
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Sport calipers part numbers.
Front Only PST-1346. Amazon $98.57 Rear Only PST-1347. Amazon $84.42
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01-07-2019, 09:53 AM | #3 (permalink) |
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That's going to save a few hundred a year.
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01-08-2019, 11:19 AM | #5 (permalink) | |
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Side note ****LONG POST WARNING**** I got a reply back from Powerstop in regards to my request for a "mu vs temperature" graph on the PSA pad compound. "This is the response from our Product Manager The chart that the customer referenced was something that was fabricated by Hawk’s marketing department. Real friction readings do not follow nice pretty curves like that and there are many more factors than temperature and friction coefficient. In addition to temperature, factors like vehicle weight, vehicle speed, pedal pressure, stop duration, brake system design, etc. all play into how a pad is going to perform. Brake system design consists of the following: Master cylinder diameter Brake pedal lever Booster type ABS System VSC System Brake Bias Caliper Piston diameter Caliper design Pad shape Brake hoses Brake fluid type Power Stop does not create graphs like this because there is no such graph in real life." Now, I'm not claiming to be a materials engineer. However, I don't see how such a chart can't exist. Under lab conditions, it should be possible to calculate mu with all other variables known and controlled. Their response does seem to be have misinterpreted my intentions though. The product manager seems to think I am looking for a chart that graphs FRICTION (which would have to factor in many variables that differ based on the vehicle), but I am merely looking for a MU graph which should translate to the real world as "pad bite" and when the mu drops off aka when "brake fade" comes in. Do we have any materials people in here that can enlighten me? I'm sure real world materials testing is way more complex than just F =μN. Would love to learn something new. The chart I attached below is the Hawk graph in question. |
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01-08-2019, 12:41 PM | #6 (permalink) |
Ronin Samurai - Assassin
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One other thing. Rotor material. Different companies use different grades of cast iron. Also powdered iron. Each has different friction coefficients.
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