Preheat oven to 350.ø Grease and flour a 9 inch tube pan or bundt pan. In a large mixing bowl, beat eggs slightly with a whisk. Beat in oil, pineapple (with juice) and bananas until well blended. Sift flour, sugar, salt, baking soda and cinnamon together. Stir into wet ingredients with a wooden spoon. Mix only until dry ingredients are moistened. Pour into pan and bake for 1 hour and 10 to 15 minutes, until browned and cake shrinks from sides of pan. Cool completely on wire rack before turning out.