Don't flame me guys, I've read countless threads, but still struggle to grasp this.

I have an 07 new body style, so an 87 mm returnless. I understand it would take a fuel pressure regulator, and a line returning to the tank. Do you tie the fuel rails together and then to the regulator? What does the return line go to at the tank? Is there a diagram somewhere I've missed?

Thanks!

 

Are you wanting to go to a return style fuel system for some reason since the truck is returnless.

A real pita to go to a full return style system due to the piping of your new truck.

Or are you simply trying to change fuel rails and go to a set that are set up for return.

little more information and we can help you.

 

What he said. We need to know the why...

 

A returnless system still has a regulator, however it is mounted inside the tank.

A return style has the regulator on the fuel rail, and a return line running back to the tank.

If you wanted to make your system have a return line, you would need to get rid of the in tank regulator, run a return line through the top of the sending unit, run a return line to where you want the regulator, and mount a regulator where you want it, usually by the fuel rail.

 

I just keep reading that return style can only support so much horsepower, so some people convert their returnless over to return with a couple pumps in tank. I don't plan on making the power needed to convert, just trying to understand.

Gadgetized summed up what I was looking for pretty much.

 

Everything i have read is the opposite...


My future plans are to add a surge tank... Keep the returnless intank pump feeding a 1-2 gallon surge tank, then add a big external pump to the surge tank feeding the rails.... So the surge tank and foward will be return style... i hate the returnless setups... All the ones i have seen have a PSI drop at WOT, which GM says is acceptable.. I hate it...