when in doubt, i go to calorieking.com. according to that website, a spicy tuna roll (4 pieces) is 140. 8 pieces would obviously be 280.
also another website
http://whatscookingamerica.net/Appet...forniaRoll.htm
listed the calorie count of 290. sushi is pretty standard though.
good for you for discovering the beauty that is sushi! hehe.
but yeah, calorieking.com, bookmark it. its invaluable.