Fuel Regulator.
Also, connection #1, how would you attach that to the fuel lin?

It looks like he ran a new supply line after FPR to the fuel rails. It looks like it is a -6 line. I think we have that size intlet fittings on the rails so it should be a more or less direct hook up.
As far as connection 1. He probably cut the line and flared it and then put a flare to an adaptor on it. DKPhoenix correct me if I am wrong.
Is the higher pressure he is reading at his rails a common problem with running a larger pump and billet rails???
Keith
The two ports on the sides of the regulator are inlets, which should be attached to the fuel rails. The port on the bottom is the return, it should go to the fuel tank. If you're not using one of the inlet ports, it can be capped off or plugged.
I don't quite understand how you would use this return style regulator in a non-return type system. The regulator has two inlets, and one return. There is no outlet to go to the rails.
The two ports on the sides of the regulator are inlets, which should be attached to the fuel rails. The port on the bottom is the return, it should go to the fuel tank. If you're not using one of the inlet ports, it can be capped off or plugged.
I don't quite understand how you would use this return style regulator in a non-return type system. The regulator has two inlets, and one return. There is no outlet to go to the rails.

There will be a pressure drop across the rails. That is why you want to regulate it after the injectors.
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The proper way to do it he said was to run the fuel line, exiting the other fuel rail, and back to the tank with a no return line FPR somewhere between. He said I could use mine like that and cap the other end..






