Heat the oven to 350 degrees Fahrenheit (176C). Grease two 9-inch round cake pans and line the bottom with parchment paper then grease the top of the paper. Or, grease and flour the bottom and sides of both pans.
In a medium bowl, whisk flour, baking soda, salt, and the cinnamon until well blended.
In a separate bowl, whisk the oil, sugars, and vanilla. Whisk in eggs, one at a time, until combined.
Switch to a large rubber spatula. Scrape the sides and bottom of the bowl then add the dry ingredients in 3 parts, gently stirring until they disappear and the batter is smooth. Stir in the carrots, nuts, and raisins.