Fuel pumps. How much and where?

[Bl4cK32]

044 is for external use, the 040 is for in tank use

The 044 will only flow as much as the 040 when mounted in tank, but will flow more when used as a extrenal pump as it was designed to do

Please explain......

Is this true? Why would mounting it internal make a difference to flow??

[Chris32]

Please explain......

 

Is this true? Why would mounting it internal make a difference to flow??

I would explain if I knew for sure, I am just passing on what I have been told

I have been told by alot of people, and the guy that sold me my pump, Mick at Tilbrooks etc

Have you seen either of the pumps? The 040 has a large filter/strainer at the bottom, the 044 has a small inlet for fuel hose, which people then attach a strainer too with a short length of hose, this must restrict it somewhat. I think when the 044 has to suck fuel up from the tank, and then pressurize it, and then pump it under pressure to the fuel rail it doesn't flow what its rated at. When it recieves constant flow from a surge tank or a small lift pump etc it will then perform to its rated flow, and out-perform the 040

I think its just a matter of using them for there intended purpose. In tank, the 040 is best suited and works well, and when mounted in tank the 044 works well, but apparently will flow the same as a 040 when it is mounted in the tank.

Hope this makes sense, as I am just passing on what I have been told

That said, many people are running in-tank mounted 044's but from what I understand there is no benefit in running the bigger pump unless it is mounted externally and is fed the fuel, rather than having to suck it up

Chris

[Chris32]

Also one thing to note, Tilbrooks install a relay when they installed my 040 to increase performance, might be something to look into as well

[Bl4cK32]

The 044 would suck fuel through the same size tube whether its mounted internal or external...

[Chris32]

What I mean is, when it is fed fuel by a helper pump - ie mounted externally out of the fuel tank as it was designed to, it will outflow the 040

When it has to suck fuel up itself, as it does mounted internally, it flows the same as a 040

What I have been told by all the people in the know anyhow

[Bl4cK32]

U have Pm chris32

[Chris32]

U have Pm chris32

Pm'd you back

One thing we know for sure, either pump will do the job just fine

Chris

[Steve]

Does anybody know what colour the negative wire is coming off the fuel pump on an R33? I was thinking of doing the relay thing too, does anybody know of any negative effects of using this? anyone got photos of a relay setup?

this whole variable speed pump at idle thing really freaks me out

Chris, perhaps Mick didnt have any 044 pumps in stock at the time?

[Chris32]

Does anybody know what colour the negative wire is coming off the fuel pump on an R33?  I was thinking of doing the relay thing too, does anybody know of any negative effects of using this?  anyone got photos of a relay setup?

this whole variable speed pump at idle thing really freaks me out

Chris, perhaps Mick didnt have any 044 pumps in stock at the time?  

Can't help you out with the colours of the wires Steve

I put the pump in myself, then Mark had to re-wire it and put a relay in for me. This all happend when it was being re-mapped, before the Mick dynasty

[snake]

Cant ya just hook the new pump up to the original wiring loom? I assume so. The relay would be to avoid this voltage drop/pump speed slowing down at idle krap?

[Clint32]

yeah you can just use the std wiring, but for optimal performance its better to use new stuff, i had my 044 using the std stuff.

Steve just remove the pump and you will see all the wires in the sender and pump, its a easy job on a 32, not sure on the 33s

[Steve]

Yep, saw them, but the wires mysteriously change colour when they plug in on either side of the fuel tank access hole - I was hoping not to have to remove it again:) ah well....

[EnricoPalazzo]

Guys im checking my contact to find prices on fuel pumps. Sorry ive been very sick lately.

[Clint32]

let me know dean, im after two big ones and a little one for my car, can never have to much fuel

[EnricoPalazzo]

what model numbers clint and ill find out mate

[Clint32]

yeah still decideing, 040 for in tank then two rated to about 400hp each for running in 2 fuel rails, ill find out and let you know

[Steve]

Clint, have you considered that if you have one pump and it fails, your car stops - if you have two pumps the car runs then goes bang?

Paranoid biatch aint I:)

[Clint32]

if you are at full noise and the one and only pump shits itself why wont your motor go bang? pumps normally dont stop they just lose pressure so any failure is not good, so two pump will give a extre chance and with big injectors 700+cc will nearly do the job.

one 044 will support the 600hp no probs but i wonto use two as there are two large fuel lines allreay on the car thanks to nissan and their hicas

remember once tuned any change in pressure will change the amount of fuel going in, so it will make it go bang if left for long enought

[Steve]

yes, lucky for those that own R32s - very considerate of nissan. Other way of doing it is one supply, one return. SK was saying that he runs the stock pump as a lift pump, surge tank and one inline. But three pumps is just plain greedy:)

[Clint32]

steve i have no pump in my tank atm, so i wont to use a 040 intank and then two pumps rated to 400 or so hp each to run into a twin entry fuel rail, when you add up how much the rest is costing another $500 or so is nothing