Andy..... THREE hours of track time in one day?? That's a lot. JonB at Parts Rack and Bill from APEX have both given very good answers, but, as the EBC distributor, I wanted to respond personally.
First, let me urge everyone to read and understand the specifications for their brake pads. I'm a lucky guy because EBC is so "up front" about publishing their specs. I wish I could get this same info out of other manufacturers. Let me quote some numbers from the EBC "Wear/Temperature" chart as printed in their catalog, and posted on our GreatBrakes.com Website. Using the "0 to 10" wear index rating, the EBC pads are rated as follows:
Green: A "3" on the wear scale, and good for approximately 125 "racing" miles, at a maximum of appproximately 900 degrees. Those miles mean "maximum performance" near the 900 degree level for the 125 miles. Obviously, if you're street driving those Green pads, with only occasional hard, unsustained, lower temp use, they are going to last a LOT longer. We have many customers already with more than 10,000 miles+, and still lots of meat left. These are very quiet, very little dust, and have a friction coefficient MUCH higher than the stock pads. You really CAN notice an improved "seat of the pants" feel to your brake pedal.
Red: A "5" rating on the wear scale, and good for approximately 200 miles at 1300 degrees. Generally less dust and noise than the factory pads, but not as good as the Greens.
Yellow: A "7" out of 10 for the wear index, and now good for approximately 250 miles, and now up to 1500 degrees of temperature maximum. Not recommended for street use.
Blue: The MONSTER pads! "10" on the "10" wear index. And, now we're talking about approximately 400 miles at the 1500 degree maximum. These pads like the pro racer's "pedal tap", near the end of a long straight, to bring the temperature UP, before you have to go ******* them. DEFINITELY not recommended for street use.
A BLUE front and Yellow rear combo is absolutely KILLER on a reasonably "track prepared" Viper that has some decent durability and cooling modifications to the stock system. Many also like the Yellow front and Red rear if they are not trying to set "a new fast time" every lap.
Andy, now let's look at your case specifically. For those 3 hours of track time, although I've never driven the track you were on, I've got to believe you would be averaging somewhere at LEAST around 70mph or more. Even if you were NOT out there quite 3 hours, I certainly think those Red pads lasted at least to their approximate rating of 200 miles, or perhaps considerably more. On top of that, to run that much time squeezed into a day, it also figures you had to be running some LONG sessions, likely even longer than Viper Days. If so, I'm almost 100% sure you would have been EXCEEDING 1300 degrees for some periods of time. Your post did not say if you were checking your brake temps, so I'm assuming you were not. Bottom line here, is that it seems to me that the pads performed exactly as they were designed and advertised to do. However, you and everyone else also need to understand that there are also MANY other factors that could have affected your use. We've found that proper break-in is VERY critical, and can cause LARGE variabilty in performance. The same is true for the rotor condition to start with. Even minor "scoring" affects friction, heat, wear, etc.
When you get right down to it, it takes a lot of testing and evaluation to work out the right setup to suit your specific car and equipment, your personal driving style, and the track involved. Unloading "fast" off the trailer is a fantasy we all pursue, but rarely achieve. When we at GreatBrakes, or Parts Rack, or APEX, or any other dealer of our products or our competitors, are asked for advice about choosing a pad for a "starting point", we all give it our best shot. However, in truth, it's a bit like asking us "how long should a roll of bathroom tissue last?" It all depends on how you use it!
Andy, even though I think the pads really did perform as advertised, I don't want you to be unhappy. So, as the EBC distributor, GreatBrakes.com will work though your dealer to give you some "adjustment" on what you already purchased, or a special deal for trying a range that may be more suitable for your use, or whatever you think is fair. I'm assuming it's probably JonB at Parts Rack, so get in touch and let's get you fixed up.
Wing King
Managing Partner
GreatBrakes.com
Exclusive USA Distributor for EBC Viper pads