Not Sure What Vmca2 is?
On the B707 if you had 2 engines out same side and flew the approach at Vref +30, for a flap 14 landing (Vref of 136Kts+30Kts =166Kts )you were below Vmca for go around at 173Kts so you would need to continue down the slope to gain speed before you could set full go around power!
What Type are you referring to?