Making a 2 ramekin recipe into an 8 ramekin recipe: Do I change the cooking time?
Should be exactly the same - what you are cooking is the same size, how many you are cooking makes no difference. One cupcake or 50 would take the same amount of time to cook, if that's easier to think of. A pan of boiling water in the oven does not care how many ramekins are in it, so long as there's some space between them