boost is holding fine and compression @ 150 and no smoke dane miller just fixed a bunch of boost leaks for me and the afr was in 11's i need to recheck the fuel pressure. IDk what else would cause a dramatic loss in power. I have felt the car get slower and slower for the past couple of months and the dyno proved it. car put down over 400rwhp when 550bb were new and i had boost leaks. now its dropped over 100 hp at the wheels. I went from a dyno jet to a mustang(operator checked it) but it should not be that low. low boost 10lb made 250. 15lb made 265, and 17 made 280.