My take is - pistons are still plentiful. If you allow these 10.6:1 aftermarket pistons, many, many heads will become trash because they're already shaved to increase the compression ratio up to near 10.5:1. MOST guys don't run 88 HC pistons, right?
I don't see any good reason to allow anything but the stock pistons right now. Regarding the comment about what SP2 allows...??? I don't see how it applies. We are 944 Spec. A pure and independent class.
I think it's wise and in keeping with the class philosophy to mandate only stock internals in our engines. It's not just the HP/TQ numbers that count, it's the power curve.
I'm dead set against going to any HP to weight system. And it's not just me. When we had our big Series Director meeting in Sacramento back in 2005-2006, all 5 of us Series Directors agreed on this point with almost no discussion needed and we agreed we would push back against NASA if they tried to take the class that direction. Those systems are more useful for classes that allow different makes and models of cars and even then, there's ALWAYS bitching about not enough or too much weight on this or that car.
If you make your engine legally and meet the 2600 lb rule, we'll have great racing like the class founders intended. It's so SIMPLE. On the other hand, let's say I come across the scales at 2550 on Saturday, do I have to go to the dyno to prove I'm down on HP that day? What about the next day after I change the plugs and go to a lighter weight oil and I'm up 6 HP from yesterday? Do I have to go to scales and dyno again? Scaling everybody at 2600 lbs every time is so quick and simple. No math, no guessing about weight penalties.