Last year when I ran at Reynolds, I noticed that my boost was fluctuating a lot and just not pulling like it should have. I was fighting some popping also occassionally through the intake. I performed compression and leak down tests and they looked good. I finaly said WTF, and went to a roller system. When we got my cam out, I had 2 worn lobes by appearance at least. The #3 intake and another. After my roller system was in and everything was back together, my boost does not fluctuate anymore and the car pulls like a mule. My sig says enough, a 10.81 with a little ole PT54 turbo.
Good luck and keep us posted.
i hope this is my problem! thanks