People on 4*1000cc injectors will one pump be enough to supply up to the 480-500bhp mark?
500bhp will be the limit

Bosch 003 pump in the tank and the 044 will be feeding from a 5 litre swirl pot under the floor pan of the car

 

Chris,
Yes, I run this set up for eight x 803s and around that power level and I only run a 1 litre swirl pot....

 

Yes without a doubt, the 044 is easily capable of flowing 500bhp, and 5 litres is far more capacity than you would ever need in a swirl pot.