FOR CAKE: Preheat oven to 350F. Grease and flour a 12-cup Bundt pan. Sift the first four ingredients into a medium bowl. Whisk the oil, sugar, brown sugar and eggs in a large bowl until well blended. Mix in the dry ingredients. Add the carrots, pineapple, banana and pecans; blend well. Pour into the prepared pan. Bake until a cake tester inserted near the center comes out clean, or about 1 hour. Let the cake stand in the pan for 10 minutes before turning out onto a rack to cool.
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FOR FROSTING: Beat the cream cheese, powdered sugar, butter and 1/4 teaspoon cinnamon in a medium bowl until smooth. Spread frosting over the cake. Sprinkle with additional cinnamon
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Can be prepared 1 day ahead. Cover with a cake dome and refrigerate.