going to be running a swirl pot in my 200 but im confused:(
im looking at pumps and i cant work out which i need how much lph of pump am i going to need for 500hp? i thought the walbro was 255lph but all the expensive ones seem to be a lot less than that.
also i need lifter pumps for my pot as apparently if i use my in tank walbro for that itll break as such which lifter pumps would be best and they seem to be half the flow of the high pressure pumps so do i need two?
also what else am i going to be needing to run this kind of set up?
cheers guys
Hopefully, I've already answered your question here:
http://www.vems.co.uk/forum/index.php?topic=97.0Scroll down to post 5 - Fuel supply and hardware. I've walked through a calculation example so that you can estimate your required flow given your expected engine airflow and lambda requirement.
If you are using the standard tank, I don't see a problem with running the existing in tank walbro as the lift pump, since it has a small built in collector in the pump / level module. Even with an aftermarket tank, it shouldn't be too much of an issue to use an injection pump to supply the swirl tank, as long as you have the pickup centrally located and don't run the pump dry for extended periods.
As mentioned in the link posted by Volvo850r, don't forget the electrical supply required for the pumps - voltage drop to big pumps running high pressures is a surprisingly common cause of engine damage due to to the engine running lean, since the pump isn't capable of supplying enough fuel at 6 volts or whatever.