Hi,
Still looking around on my own ... I went over to Cook's Illustrated which had an indoor clambake with the following ingredients:
Serves 4 to 6 2 pounds littleneck clams (small), or small cherrystone clams, scrubbed
2 pounds mussels , shells scrubbed and beards removed
1 pound kielbasa sausage , sliced into 1/3-inch-thick rounds
1 pound small new potatoes (or red potatoes), scrubbed and cut into 1-inch pieces
4 ears corn , silk and all but the last layer of husk removed
2 live lobsters (about 1 1/2 pounds each)
8 tablespoons butter , melted
In a stock pot, they have for the bottom layer the sliced kielbasa, followed by the clams and mussels wrapped in cheesecloth, potatoes, corn and lobster. These are then cooked over high heat for 17-20 minutes until the lobsters are bright red and the potatoes tender.
What's possibly missing? There is no additional liquid added. I assume it is provided by the clams and mussels.
If I doubled the quantity of clams, mussels and added additional lobsters, since we are relying on the liquid from the mussels to steam the lobsters, I assume the cook time should stay about the same.
I'm thinking out loud ...
Regards,