Andrew 825SM

I have a greddy kit on my gsr 00 and when I boost I have more power when I'm at half throttle than at full throttle. When I'm at full throttle my car feels very sluggish, but when I only step on the gas half way while boosting, I feel more power. I'm wondering if this is related to my fuel setup and if it is, what do I have to do to fix this problem? My fuel setup is the greddy blue box and the 320 cc inj. Thanks for your help guys.

DA666

i hear the greddy blue box is the root of all evil.....as i heard on a post before like 10 up from this one.........