97 cobra kenne bell 2.1 Fuel pump?

[Cobrasc88]

I have a 97 cobra with the kenne bell 2.1. I had a boost a pump on my car with factory injectors. I am getting rid of my boost a pump and have a walbro 255 pump in the car already. In the process of building the motor and I have 60lb siemen injectors, im going to be running around 15lbs of boost. I had 389rwhp with 5lbs at the dyno. Will I need to get another pump in line or should i be fine? Deleting the egr and smog, also going to be running on racing fuel. What hp range should i be around and is it going to be enough to need a bigger pump or another pump? thanks