I am getting ready to install the fuel tank in my '73 GT conversion project and need a sanity check on the strainer screen on the tank. The PET shows a strainer screen that seems to line up with the pump suction inlet line. This is consistent with my experience on 911's. However, the screen only fits on the return line fitting on the tank. I am running PMO carbs with a PMO fuel regulator and a return line.

1. Do I need the strainer? I don't recall one being in the tank originally. I plan to run a fuel filter between the tank and the fuel pump inlet.

2. If I use the strainer, should it be installed on the return line?

Click to view attachment

Click to view attachment

Strainer goes on the suction line to the pump.

Looks like new Dansk tank? Not sure why it’s not fitting. Maybe a little persuasion - it’s ok if the sock crushes a little but if it doesn’t fit over the supply line that is a different problem than what looks like it won’t fit into tank fitting.

Porsche has been screwing up parts lately. Perhaps the sock is now sized for later tanks & supply lines that had smaller supply line when they moved pump to front?

Try looking inside the tank. I think the sock fits inside the middle of cup that holds some fuel.

Doing some additional reading on this. The larger fitting on the tank is the supply line (not the return line). The sock strainer is in the correct spot.

What is the purpose of the in tank strainer ? If it clogged up while driving the diagnoses and remediation is a stretch.
I rely on the filter in front of the fuel pump, easy to see and easy to replace.

The sock is a very needed part. It acts as a filter screen and a sealing ring for the fuel sending line. You kinda need it.
Matt

Modern pump & filtration scheme is:

Screen (100-300 micron) in-tank on suction side of pump
20-30 micron filter on pressure side of pump (carb)
— OR —
10 micron filter on pressure side of pump (FI)

The purpose of the screen is to protect the pump without adding restriction to the suction side (especially if a long suction hose is present)

If you’re clogging up a 100 micron tank screen, you have serious issues in the gas tank. If that sort of in-tank corrosion & contamination is present - you’ll definitely clog up a 30 micron filter very quickly.

Yeah - I know this isn’t the way it was done stock. Stock pump location and filtration scheme wasn’t VW / Porsche’s finest engineering. Lots of vapor lock and lots of engine fires. The OEM plastic fuel filter located near the exhaust is

As always, do what makes you happy.