[farminflyboy]

Case has a good starting point. It depends on how hard it is to thresh, hard crank the rotor up to 1000. Easy open concave to 2.5ish and slow rotor down to 880-920. I like to slow rotor and or open concave till it starts to leave a few in the head, then speed it back up/tighten it down incrementally till it threshes it all out. This will free up some power and get you some more capacity. If straw isnt to tough it should be at least a 1000bph combine.

 

[farminflyboy]

Open sieve a bit. Try a bit faster rotor and open concave. Air and fuel filters clean? Take back cover off of fuel injection pump losen 10mm jam nut and turn slot 1/3-1/2 turn clockwise. Tighten waste gate 6 turns, then smile. What rotor?

 

[farminflyboy]

You might put on a kile kit, that will wake it up.