SR20 gt2871r losing power at full boost

[Jersthecool]

So after a couple days of breaking back in my engine I decide to do a nice pull and see what happens. Turbo starts to spool and I get full boost at say 3800 and it pulls hard until about 5k and then it suddenly loses it's pull and keeps revving up while not pulling and the turbo is still at full boost according to boost gauge. I put fresh bk7re's in with a gap of .30 and decided to open the gap to .35 because that's what they were when I pulled the old ones and I took it for a rip and it pulled hard until I shifted at 7k, so I thought it wasn't getting enough spark before so problem solved right? Nope!

Take it out for a spin today and the same thing happens pulls hard and at about 5-5500 it loses it's power. Anyone know what's going on and what I should do?