Whats your capacity in winter wheat?? Generally looks like 8120 will do 4 mile/hr- 4.5 m/hr ; 40' header; 40 bu/ac; easy thrash varieties; taking in 2 ft of straw; good stand no logding; 85-90 degrees sunny; Throwing over .2-.4 bu/ac; clean sample 1-1.5 dock; using regular chopper. Looking for guys reply that argue higher capacity cuz I believe the rotor starts lugging down after that or for sure engine power goes way down. afx standard rotor; concave setting around 12 with all small wires. It does have the room for more bushels on cleaning but it gets back to the rotor and how much straw. I don't see how anybody is getting 5.5 + mph on 50 bu/ac+ with 2' straw coming in. What am I setting wrong or is my analysis in the normal range.