Heat the oven to 150°C and spread the pecan nuts on a baking tray. Roast for 7 – 8 minutes until toasted. Allow to cool.
Turn the oven up to 180°C and line 2 x 23cm springform cake tins with baking paper. I spray the tins and the baking paper with non-stick spray as well.
Using an electric mixer, beat the two sugars with the eggs, until fluffy. Add the oil and vanilla extract and continue to beat until well combined.
Fold through the drained crushed pineapple, grated carrots and drained raisins until well mixed.
In a separate bowl, sieve all the dry ingredients and then fold this through the wet cake batter until well incorporated.
Divide the batter equally between the two cake pans and bake for 30 – 40 minutes. The cake is done when a sharp knife is inserted into the middle and comes out clean. Loosely cover the cakes with tin foil for about 25 minutes if necessary to prevent over-browning.
Allow the cakes to cool in the pans on a cooling rack. They should be completely cool before icing/frosting them.