Sift together sugar, soda, baking powder, salt, spices and flour. Add eggs, oil, pumpkin and water and mix with beater. Fold in chopped nuts. Pour into greased loaf pan. Bake 1 hour, 15 minutes to 1 hour, 30 minutes at 350 degrees. Cool in pan on a rack for 10 minutes. Remove from pan and continue to cool on rack.
