Because the chiffon cake mainly relies on the cake batter attached to the inner wall of the mold to rise, so the strength of the mold's attachment has a greater impact on the chiffon cake production results. This is the main reason why chiffon cake baking, molds can not be greased and lined with paper.
The hollow mold because of the middle of the protruding mold, increasing the cake batter and mold wall contact area, more convenient cake rise, especially can be better to prevent the middle of the chiffon cake collapsed and hard center situation. So if you have the conditions, or prepare some hollow mold baking chiffon cake.