Sc1 is the compound, the tyres I was looking at (supercorser v2) come in sc1 front and either sc1 or sc2 rear. As I was told the v2 is Pirelli's latest tyre so I'm guessing it's replacing the straight supercorser with the supercorser v2. I used to race super sport with supercorser sc1 front and sc2 rear and loved them too.
Dad are you running the sc1 front and rear and is it track use or road and how long are they lasting?