Boddster, I think I replied to your question in the 767PIC forum
But you and FGE are both wrong in thinking that EPR will increase in a dive due to the ram effect. 2.00 EPR means that the pressure at the AFT of the engine is twice as high as in the engine inlet. So if the pressure in the engine inlet increases, EPR will drop. Whether or not it will drop below 1.00 (ie. the pressure in the inlet is higher than at the exhaust end), I'm not sure, it's possible.
Iz