Grease and flour a large bundt pan (This recipe makes 8.5 cups of batter)
Preheat oven to 325 degrees F
Mash three ripe bananas (to make equivalent of about 1 ½ cups) Set aside.
In a separate bowl whisk the flour, baking powder, and cinnamon to combine, set aside for later.
Cream the butter with the paddle attachment in your mixer until smooth. Gradually add the white sugar, and mix on medium speed until light and fluffy 4 to 5 minutes.
Add the vanilla extract, and then the eggs one at a time blending after each to incorporate.
With the mixer on low speed, add the flour mixture alternately with the mashed bananas to the butter, sugar, & egg mixture. Begin and end with the dry ingredients. (We like to do three additions of dry ingredients and two additions of wet.)
Mix until just blended after the last addition. Stir in the crushed pineapple and pecans.
Scoop the batter into a prepared bundt pan or tube pan.
Bake at 325 degrees for 1 hour and 5-10 minutes or until a toothpick can be inserted and removed with with no crumbs or just a few moist crumbs attached.
Allow to cool in the pan on a wire rack for about 10 minutes before turning the cake out.