Preheat oven to 350°F (175°C). Grease and flour a Bundt pan., In a large bowl, whisk together flour, sugar, baking soda, and salt., In another bowl, beat eggs, then mix in oil, pineapple juice, and vanilla., Combine wet and dry ingredients, stirring until just blended. Pour into prepared pan., Bake for 45-50 minutes or until a toothpick inserted comes out clean. Cool in pan 10 minutes, then invert onto a wire rack.