I've been researching the issue but keep finding people with a delay at the top of their rpms. The issue I'm having happens during wot runs. Say a 2nd gear roll, slowly accelerate until wot and the car will pull hard as ever if i'm not spinning. Then i release throttle shift to 3rd and pound the throttle again. The car immediately falls on it's face, no acceleration no deceleration, everything feels silent like it's suffocated. I've had my tuner in the car when I did it (happens 85% of the time) and he thought it might be a torque limiter designed to save the stock driveline. We reconfig'd the limiter and the problem persists. Mods are posi port 2.76/4lb with 60# injectors, kb bap, dual gt pumps. I bought a modified fpdm and were having issues so we went back to stock. Later turns out that just a fuse popped so the modified is in my garage and stock istalled. I will be going to dual fpdms in the future Any ideas?