I read all of the information in that link. You are using a Walbro Pump for this?? The fuel system does need a regulator to operate correctly so the fuel system will need to be modified is what it says. I do understand that the return goes from the regulator back to your pump. It also says if you do not use a regulator with the pump and lower the fuel pressure the flow will be reduced by 50%. 50% of What???
Also there is NO Flow Data that I could find anywhere. It just say's this one for 500hp and this one for up to 1000Hp. Can you point us in that direction of the Data so anyone interested can know how much fuel these pumps actually flow?
Thanks in Advance