Yes that 2606 definitely takes more power than the 2206 (non chopping) head it replaced. It does a good job of chopping though and will save a pass with the stalk chopper. One negative--you have to get under the head to grease it.
The plan is to disk or chisel the ground right behind the combine. I'll post pictures of the results.
Those stalks will be tough on tires. You can see the blunt ends of the stalk in the one picture. Makes for a riged tire poker. Other chopping heads seem to leave the stalks shredded more on top. You can see the difference in another thread by redsdfarmer. He had both the Case and Geringhoff chopping heads in the field.