Hi,
I need to install a new tank in the 40. If I install one with a in-tank fuel injection pump and also install a return line from the motor. Can the high pressure pump function with a restrictor to a current carburetor - throwing the excess pressure and fuel back via the return line? I would like to do this for the current setup and be able to convert to injection later.
Is this reasonable?
Aeromotive has a regulator that comes with 2 springs. It can be set up to reduce pressure to carb levels and then when you want to go to EFI, you just swap springs to bring the pressure up. I looked at it, but didn't need it because I decided to go directly to EFI on my GT Spyder project.
http://www.jegs.com/i/Aeromotive/027...FUk6gQod4RgMBw
Thanks. I already have a regulator on the carb and an adjustable one for the injection. Do you think the carb one can handle the high pressure on the inlet prior to bypassing?
If questionable, I will go with the unit you suggested.
Hard to say. Some carb style regulators are not designed for a lot of inlet pressure. I've seen several of the cheap round chrome regulators fail with just stock mechanical pump pressures. I switched to Holley style and never had another failure, but I don't think even they are built for a lot of inlet pressure.
The main risk in doing it your way is that if your carb regulator fails, you will be sending very high pressure to the carb and will most likely have gas going everywhere. No guarantee that the Areomotive unit won't fail, but at least it's built to do what you need.
Go with a low pressure pump and problem solved.
If you ever do switch to efi you simply replace the pump.
Just a thought . . . Call Holley and see if that new in-tank pump they have developed could work for you. No return line necessary. It dumps back into the tank rather than using a return line.