I don’t see a dual walbro setup mentioned. Searching for info on the car I don’t see one mentioned to be on this car. With a dual pump setup you have more than enough fuel for 800 plus wheel horse at 43psi base on those injectors. If it is on a single pump you shouldn’t have enough fuel to support 500-520whp to the wheels at the boost levels you are claiming.
I’m thinking you are out of fuel due to a single pump because those 1600’s can support more. If you are on a single pump these numbers are NOT correct. Sorry.