I have a much milder setup than you, have been fighting other problems, and have yet to really put down a solid number yet. This information is probably basically useless to you because of all that, but I think my Circle D has been doing a fine job so far. It's a 245mm pro series triple disc, 3c stall. On a stock bottom end with home ported irons and a 212 flat tappet, it stalls 2700 at 0 psi, 3400 at 8-9 psi before my vacuum brakes give up, and drops from 5700 back to between 5000-5100 on both shifts, according to my pl files, at whatever power it takes to trap 119-120 in a full weight car with a full weight driver. I ran a string of mid 11's a few months ago, with mediocre 1.7 60' times due to a crack in a header collector opening up on me. Locking at around 900 feet each time.
