Well after eight days and a couple of email I finally received a response from Sierra. I asked them for the coeficient of friction and temperature range of their pad compounds. Preferably a graph compairing the two on X,Y axis.
The response was all but useless. They stated that they do not have that information but they have documented caliper temps of up to 600 and rotor temps of up to 1050.
Sooooooooo, any pad change you make will be a bit of a shot in the dark because we have no idea what the properties of what you are running are!
That is one thing I like about Wilwood. Unlike most pad manufacturers they have all the information right there, readily available. That is SUCH a big help when it comes to brake design, tuning and problem determination. It is also a primary factor in why I am going all Wilwood.
You would think that pad manufacturers would have this information available wouldn't you? Are they saying that they have never run their pads on a brake dyno as part of their R&D? Are they hiding something? Lazy? Blows my mind. Would we buy a camshaft, tires, safety equipement based solely on '...we make good stuff......'
I think NOT!
By the way, the pads could just be glazed, that causes sqeal.
I have a set of 'J' compound Wilwoods pads if you need them. CF averages .58, stop cold or hot (actually a lot better cold than the 'cold' stopper pads), good for over 1300 degrees. These are racing pads. Dusty as he!! and unless you are running them hot, 'rapid' wear. Part 15J-7222K.
Rick