electric fuel pumps

Submitted: Sunday, May 02, 2004 at 12:24

ThreadID: 12545 Views:1623 Replies:7 FollowUps:1

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colin

hi folks, has any one put an electric fuel pump on a diesal vehicle as close as possible to the fuel tank. Have been told by a diesal mechanic it will give better fuel economy as well as more responsive power, his point is the fuel line and filter are pressurised, which is the same system the v8 super cars run but will it work for diesals. regards col

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Reply By: ross - Sunday, May 02, 2004 at 14:24

Sunday, May 02, 2004 at 14:24

I dont believe so.The pressure inside the injectors is usually between 11000-20000 psi so I cant see the how a few extra pounds of pressure in the fuel line will help.

AnswerID: 56913

Reply By: ross - Sunday, May 02, 2004 at 14:26

Sunday, May 02, 2004 at 14:26

I dont believe so.The pressure inside the injectors is usually between 11000-20000 psi so I cant see the how a few extra pounds of pressure in the fuel line will help.

AnswerID: 56914

Reply By: ross - Sunday, May 02, 2004 at 14:26

Sunday, May 02, 2004 at 14:26

I dont believe so.The pressure inside the injectors is usually between 11000-20000 psi so I cant see the how a few extra pounds of pressure in the fuel line will help.

AnswerID: 56915

Reply By: ross - Sunday, May 02, 2004 at 14:26

Sunday, May 02, 2004 at 14:26

I dont believe so.The pressure inside the injectors is usually between 11000-20000 psi so I cant see the how a few extra pounds of pressure in the fuel line will help.

AnswerID: 56916

Follow Up By: Member -Bob & Lex (Sydney) - Sunday, May 02, 2004 at 17:23

Sunday, May 02, 2004 at 17:23

bit of truoble there ross

FollowupID: 318713

Reply By: Member - Bradley- Monday, May 03, 2004 at 10:31

Monday, May 03, 2004 at 10:31

You want to run it as a 'lift pump' ? Then yes it will help as it places a small head of pressure onto the main pump, and reduces cavitation and starvation on the main pump and increases the efficiency of the main pump. Will it give a remarkable increase in power etc. can't say, but it can't hurt. Low pressure external fuel pumps aren't too expensive so it is a cheap experiment.

A lot of hydraulic systems ( oil / fuel / water etc) run multiple staged pumps, on the aircraft we even had pressurised storage tanks . Most race cars run lift pumps from the fuel cell to a surge tank, then through multiple pressure pumps to the fuel circuit.

AnswerID: 56999

Reply By: Martyn (WA) - Monday, May 03, 2004 at 21:40

Monday, May 03, 2004 at 21:40

Colin,
I have an electric pump on my Rangie, this is more about info for finding a fuel pump rather than the improvements you encounter. If you are looking for a pump Rangie parts suppliers sell them as a replacement for the super reliable diaphragm pump they had installed as original.
Things I would watch for is what you are pressurising after the fuel pump like the fuel filter and the fuel lines from the pump to the filter, they might leak with slight pressure. My GQ had an extra filter on it with a glass bowl water knock out, I don't think this would of taken the pressure.
When you go out in the bush it's also something else that could fail, your normal diesel pump won't be able to suck the fuel through one of these pumps if it breaks so you could end up in a worse situation. My thoughts.