I have an iron headed 406 sbc with a cheater plate. I am running the NOS jetting 63/71 for a 150 shot. Flowed the fuel pressure at 5.5 and it still is popping on the nitrous. I run about 950 bottle pressure and it acts like its still fat. I am trying to make sure my tune is right cause its got hyper pistons for now. Any help would be appreciated. If you need more info just let me know.