If all things go well, I will be driving the GTMR a couple more times this year in races. I have a set of 8 pot mono block brembos sitting on the shelf. I have 12, 13 and 15 inch rotors as well, but was not sure if they would fit with an 18" rim. The GTMR is in Stockton and I am in San Diego so test fitting is kind of hard. By my calcs I would have to go to 19s to run that big of a caliper and a 15" rotor. The 8 pots are probably a bit much, and obviously I won't know until I actually try if they will fit, but I have them, so I may want to use them, and I was interested when I saw this thread about using 15" rotors what your whole setup was/is.
Now that the GTMR has a tire package, I think the brakes will be something to look at. I put brake paint on the rotors when I drove the car and then purposely went and drove very hard. I didn't intentionally abuse them, but used them about as hard as I could given the tire. I noticed some fade and all the paint was toast on the fronts. Therefore I feel the brakes may need an upgrade as well as the brake cooling system. Probably even more so now with the new tires.
The GTMR guys are always looking to make improvements, and I will be helping them in any way I can. Once tires, brakes, and suspension are done it will be time to move on to HP. It's ALL in the works. We need to drop about 12 seconds a lap to compete with the overall fast car on the track, which is a Radical in another class, but I think all the above will get the team close enough to beat the Radical since their fuel tank is relatively small and they must make quite a few more pit stops. Already the GTMR finishes on the lead lap even with the 12 second a lap differential. The GTMR is very fast already, but I think the goal is to make it Daytona Prototype fast at half the cost.
As far as me doing a GTM or GTMR, PDG has expressed a desire to have more than one GTMR at the races. I have expressed that I would like to be a part of any developement of a ground up car. Things are in the works. We'll get through the major developement this year and see how the team does at the 25 hour race. I wish to be a part of PDGs success in the GTMR program, and will do whatever I am ask to, or able to, do.
I'd also love to see an SLC out at the Southern CA race tracks. Is there anyone who may come out and race against the GTM with an SLC? Knowing the attitudes of the GTMR guys, they would LOVE some friendly competition. They're a really good bunch of guys. They'd give you the shirts off their backs, or anything else you may need, just to help get you out on the track so everyone can race.