I am the customer service guy for our energy improvement company. Recently, a customer asked what difference the orientation of his ridge vent made in relation to the prevailing wind. In other words, if the vent axis is north-south and the prevailing winds are east or west, how does this affect the performance of the ridge vent?
@Eric "without wind each night I got cold air come down the ridge vent". You didn't give a lot of details like, climate zone, outside temp, standard attic, hip roof, or cathedral ceiling?
With a well insulated cathedral ceiling, the nighttime radiant cooling can make that 1" vent channel colder than the surrounding air, thus the cold air flowing in/down the ridge vent.
As for determining the ratio between the soffit vent area and the ridge there are other considerations, but generally the 60%/40% (soffit/ridge) works fine and shifts the neutral pressure zone a bit lower to reduce the air leakage through the remaining ceiling leaks. What's your reasoning for going to 2 or 3 to one?
@Eric "In a valley I see just heat stack and more mold in attic." If the attic ventilation is at or near the traditional guidelines and they are getting mold in the attic, I would be looking for other problems.