For the batch I did last fall, the pH was 2.9 after crushing.
I treated 1/4 of it with calcium carbonate, mixed it back in, and brought the pH up to 3.5.
Fermented on the skins with pectic enzyme, water and sugar, starting SG- 1.085 and Fermaid K added at 1.050.
Racked at 1.010 a month later...