Ive been cutting wheat this past week in West Texas with my dad on our farm. We run a JD 7720 Turbo with a 230 header. The dryland wheat is averaging about 50 bu/ac. I've been driving around 3.0 to 3.5 mph. I was wondering how fast you guys with the 9000 series combines can run with 30 ft head in 50 bu/ac wheat.