What slicer are you using? This looks like simple straight-line infill of older versions of Cura? For high speed printing, you might do better with a more structured infill, such as hexagonal/octagonal infill that lays down the same pattern on every layer. Or try the latest Cura, which has a more regular square pattern - which can have its own problems at very high speeds (like 300mm/s) but should be fine at 100mm/s, provided your layers aren't too thick - what layer height are you printing at?
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gr5 2,224
1) The infill looks okay to me in the picture but if you say something is wrong then I believe you. What is the problem exactly? Would solid infill fix the problem?
2) I can print fine at 100mm/sec but only if layer height is .1mm. If it is .2mm then I need a temp > 240C. 100mm/sec with .2mm layer at 220 is just too much pressure in the nozzle. The extruder slips and I don't get enough plastic.
3) In another photo, the very first layer is thin in some spots, thicker in other spots. This looks okay to me but if you need it flatter you need better hardware (straight rods, flat bad).
4) You don't have the standard fan shroud. Your fan is blowing on the nozzle. This means your nozzle tip is colder than normal. This means you need to print hotter than normal. I'm not sure how much hotter. Maybe 250C? I recommend you print this:
http://www.thingiverse.com/thing:17602
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