2 Fuel Filter
Turbo Mini Forums

Must be lucky then, I,ve been using plastic filters ever since I went turbo BUT I always put the filter before the pump to save any crap going through the pump.I change them twice a year,total cost about £2.

Put them before the pump and they can never see any pressure so no problem (just like on my lawnmower!) but the setup here uses a high pressure pump (one that is usually used for fuel injection) with the filter after it and before the regulator :)

Schrödinger's cat - so which one am I ???

Thank you - I do understand,but where is the need for a filter after the pump if you have filtered the fuel before it gets there ?.

cause when the pump fails itll send crap down the line :) all you really need before the pump is some gause. and a good injection pressure rated filter after :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

As Evolution says...

Most mainstream manufacturers seem to put a coarse (Gauze) type mesh/filter before the high pressure pump (usually in the tank) and the put the proper filter after the pump (thus it sees potentially high pressure).

I don't claim to understand their logic, but that's what they seem to do.

And I wouldn't expose a plastic cased filter to the "after" pump pressure.

Schrödinger's cat - so which one am I ???

Thank you for the clarification -I have a gauze filter in the tank to filter out dead mice and birds etc and the aforementioned plastic filter after that - -I do wear belt and braces.
I have the MPI type filter on the shelf and will now make tails to fit it and put it after the pump where it should have a fairly quiet life.

All the fittings on my system are bolted aeroquip so im fine in that department thanks.

The filter set up is not in the high pressure side it is in the high flow side and the whole system after the fuel pump (with exception of the return line will be seing 3psi of pressure at idle not just after the fuel pressure regulator.

It is the restriction the fuel pressure regulator offers you that allows you to increase the fuel pressure. Agreed the Metro Turbo (also used in the Maestro 2L efi, Rover SD1, Maestro Turbo) fuel pump is capable of creating a few bars worth of pressure in a closed system. But in what I would refer to as a total loss system it requires a restriction to slow the fluid down therby increasing pressure.

One final point, if you place the fuel filter before the fuel pressure regulator and it becomes blocked you are going to have a major pressure build up with no way of reducing it, fitting it after the fuel pressure regulator is the safer position. Been there done that 50 gallons of water later the flames were out, so I no longer run with one ill take those consequences and keep the car thanks. Thats my recomendation what ever filter you decide to run.

Own the day

Own the day

I think we are in violant agreement !!!!

Put the filter before the pump and if it's too small, the flow will be restricted and the pump COULD cavitate.

Put the filter after the pump and the pump COULD generate a seriously high pressure in the filter if the regulator doesn't spill the excess back to the tank fast enough or if it fails.....

My whole logic is DON'T put a plastic filter where it could see pressure......

Schrödinger's cat - so which one am I ???

Sorry, i used these kind of unions http://www.minispares.com/Product.aspx?pid=38282