I thought it was discussed you got them too hot during the brake in procedure.
The F indicates that the average coefficient of friction is between 0.35 and 0.45 at or below 200° and the G indicates an average coefficient of friction between 0.45 and 0.55 up to 600°F.
This tells me decent street pad, but hardly performance pad.
I just went to a set of Carbotech XP10 front and XP8 rear couple with a new set of Brembo rotor blanks. I really liked their performance at VIR a couple of weeks ago. At my level, I am only beginning to do late, threshold braking, but each time I did it with my instructors guidance, the brakes were there for me.
A couple of people mentioned brake dust from some of the pads. Since my car rarely if ever sees any rain (and far less than 1000 street miles per year), I pulled the brake shields off front and rear a while back when I was doing a pad swap. Either the Carbotechs have less brake dust than other pads, or the removal of the removal of the shields really helped to reduce the amount of dust on my wheels during a track day.
I'm on board here 100%. Those numbers are not earth shattering. Mild performance street pad; sure. Track pad; no way. As some stated in a reply they may be good for AutoX but 600* is only the tip of operation for a track day pad. I'd want to know what they do a 1000* and be looking for a Cf of .57-.60 or better be sustained.
That pad appears to "ramp up" nicely with heat but if it breaks down upwards of 800* you'll be in the weeds in no time. Seems oddly similar to my BP20 which like BP10 is not a Raybestos material...hmmmm.
http://www.tceperformanceproducts.com/images/D_T_BP10_BP20.gif
Thanks for the advice. This is only my second track event on a course that i'm told is a little easier on brakes than some. The first event I used stock pads (without any problem) and I assume that these are better than those. I guess i'll keep these pads as a backup and buy a set of hawk HP + or a similar compound that can handle around 1k* and use them exclusivly for track events.