Combine sugar and cinnamon. Cut 15 biscuits into quarters. Roll in sugar and cinnamon mixture. Put 1/3 cup pecans in bottom of greased Bundt pan. Place rolled biscuits in pan. Pour another 1/3 cup pecans on top of this layer of biscuits. Pour 1/2 cup melted butter over this layer. Roll remaining biscuits (quartered) in sugar and cinnamon mixture; place in pan. Pour remaining 1/3 cup pecans on top.
Pour 1/2 cup melted butter into sugar and cinnamon mixture (may need to add a little more butter to make thinner) and pour this on top of the last layer of biscuits. Bake at 325 degrees for 30 minutes.