White Knight
New member
- Joined
- Aug 18, 2007
- Messages
- 1,380
I’m trying to decide how to route the return flow from the injection pump for my FASS system. None of the directions for the p-pump trucks say much about the return system. It would seem that the return would want to be addressed so that you get the FASS return to open and allow it to perform as designed. I’ve got a 150/200? And want to run it at 45psi max which is more than the stock return will take. I’ve got a few ideas on how to route the system, I just can’t decide which one to choose :bang
Option A: Route the IP supply according to FASS directions, and run the return from the other side of the pump through a regulator set at 30psi w/ a 1:1 boost reference. This would allow the system to be under more mild pressures during low power situations, and would circulate any air introduced into the system during installation or filter changes to be returned to the tank. And when 15psi of boost is reached the FASS regulator will take over and let the FASS do its thing. There seems to be a few members on this site that do it this way.
Option B: Run the supply fuel to the pump and return through a valve. If I left the valve just cracked open to flow a minimal amount it would circulate fuel while letting the FASS do its thing. But the FASS would be at full pressure constantly.
Option C: Run the supply fuel to the IP and dual feed it through the stock inlet and return port. This would run at full pressure the entire time and any air would have to be run through the IP and injectors.
Any advise or better options? Thank you and sorry about the long post :thankyou2:
Thanks,
Derek
Option A: Route the IP supply according to FASS directions, and run the return from the other side of the pump through a regulator set at 30psi w/ a 1:1 boost reference. This would allow the system to be under more mild pressures during low power situations, and would circulate any air introduced into the system during installation or filter changes to be returned to the tank. And when 15psi of boost is reached the FASS regulator will take over and let the FASS do its thing. There seems to be a few members on this site that do it this way.
Option B: Run the supply fuel to the pump and return through a valve. If I left the valve just cracked open to flow a minimal amount it would circulate fuel while letting the FASS do its thing. But the FASS would be at full pressure constantly.
Option C: Run the supply fuel to the IP and dual feed it through the stock inlet and return port. This would run at full pressure the entire time and any air would have to be run through the IP and injectors.
Any advise or better options? Thank you and sorry about the long post :thankyou2:
Thanks,
Derek