'044' pump, with or without non-return?
Discussion
What you need to consider is not just the fact that you are going through the banjo fitting, but the size of fitting - M10, M12, M14 etc.
My 290 BHP Jag V8 uses M10 hose and fittings and the same basic system supplies a 370 BHP version of the same engine.
What really counts is being able to supply fuel at a volumetric flow rate and pressure where the engine's fuel consumption is highest, up to that point it's going to make minimal difference.
I would recommend you look at obtaining a fuel pressure gauge - your fuel rail may have a schraeder valve in which case you can attach it to that - then run the engine at full load and make sure the fuel pump is generating pressure. If it is then there is no need to 'fix' anything. You can reserve that project for the next engine upgrade.
A good rolling road will have such a gauge so you could use theirs. That will save you having to buy anything.
You might want to put a fuel pressure switch in the rail - if the pressure drops you can cut the ignition to protect the engine from going lean and having a major failure.
My 290 BHP Jag V8 uses M10 hose and fittings and the same basic system supplies a 370 BHP version of the same engine.
What really counts is being able to supply fuel at a volumetric flow rate and pressure where the engine's fuel consumption is highest, up to that point it's going to make minimal difference.
I would recommend you look at obtaining a fuel pressure gauge - your fuel rail may have a schraeder valve in which case you can attach it to that - then run the engine at full load and make sure the fuel pump is generating pressure. If it is then there is no need to 'fix' anything. You can reserve that project for the next engine upgrade.
A good rolling road will have such a gauge so you could use theirs. That will save you having to buy anything.
You might want to put a fuel pressure switch in the rail - if the pressure drops you can cut the ignition to protect the engine from going lean and having a major failure.
I don't actually know what the non-return valve is for. I suppose it might be for when the pump is used as a lifter. That's not how mine is used though.
I have a fuel pressure gauge, but no way to read it under power. (I did have a remote connector for it, but it wouldn't seal properly.) I suppose I could frig the pressure regulator to demand my peak working pressure and see what the flow rate is?
I'm using vac referenced fuel pressure so a constant pressure switch wouldn't work. I've never seen a differential pressure switch, do you know of any sources?
I have a fuel pressure gauge, but no way to read it under power. (I did have a remote connector for it, but it wouldn't seal properly.) I suppose I could frig the pressure regulator to demand my peak working pressure and see what the flow rate is?
I'm using vac referenced fuel pressure so a constant pressure switch wouldn't work. I've never seen a differential pressure switch, do you know of any sources?
That non-return valve was an essential component of the K/KE Bosch Jetronic system it worked together with a fuel accumulator unit neccesary to stop the terrible fuel percolation/heat soak that can occur in the fuel lines when the engine is shut down hot then restarted shortly after 
these pumps have massive flow rates i cant see that banjo fitting causing much of a restriction if any.
these pumps have massive flow rates i cant see that banjo fitting causing much of a restriction if any.GreenV8S said:
stevieturbo said:
You do not need a non return valve.
Eliot...if thats a filter pre pump, it looks incredibly small ? Or do you pump fuel to the 044 ?
It looks to me as if the filter is downstream of the pump - the terminals are at the outlet end of the body.Eliot...if thats a filter pre pump, it looks incredibly small ? Or do you pump fuel to the 044 ?
eliot said:
Non return valve is to keep the rail pressurised AFAIK - not been a problem on mine.
Yes that is my pre-filter - its just a very simple flat mesh. I was somewhat dissappointed with it when it turned up.
I'd be running the large filter pre-pump, and forgetting about the small one.Yes that is my pre-filter - its just a very simple flat mesh. I was somewhat dissappointed with it when it turned up.
How does your pump sound ?
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