Cm870 550 hp egr problems

[808allstarr]

Driving a 2007 t800 kw with cm870 475hp boosted up to 550hp. Truck not pulling like before seems like it lost power. Insite shows egr flow derate and have pretty much changed entire system and sensors but still nothing changed. Ive been running with egr unplugged because with it on water temps run high somewhere around 220-230 which im pretty sure isnt normal. When pulling itll hit those highs and will not cool down until i level out and even then fan will not turn off for about 30 min of flat roads. My mechanics suspect the cac but arent sure. With egr unplugged itll hit 210 at most and fan seems to operate normally. Any ideas on whats happening or experience with similar problems any feed would be helpful. Thanks!