I finally spent some more money and purchased an air fuel ratio meter and found out that under heavy load, my stock fuel pressure regulator doesn't enrich at a fast enough rate and takes a second to catch up with fuel consumption so I decided to do something about it. I took one of my spare fuel rails and welded a plate over where the fpr sits and taped it so I could put a gauge in it and now I use an Aeromotive external fpr and the difference is amazing. The car has so much power off idle and under load always runs almost a perfect 14.7 afr.