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Mounting A bosch 044 fuel pump intank?

JNR24

By JNR24,
in Engines & Forced Induction

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SLY33 Mentor

SLY33

Posted
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I think they are usually mounted in tank (mine is in tank), unless you have a fancy setup with 2 or 3 044's.

There is a full tech feature of how to install an 044 pump into a 33's tank in HPI issue 18!

Basically it says:

purchase a barbed hose fitting before installation, as the 044 has a threaded screw fitting bfore the pump, not a hose clamp deal like the stockie.

Pull the stockie out and unscrew from bracket. never fit a pump without the factory strainer. Its essential to keep the length of the pickup line to the strainer the same.

044 wont fit into the std bracket, use hose clamps to hold it in. The stock wiring wont mate up- power and earth eyelets are too small --> replace with larger ones.

Then apparently its a simple job of putting the whole assembly back into the tank as before. --> on dyno for some fuel presure testing.

thats the jist of it!

JimX Grand Master

JimX

Posted
Posted
Then apparently its a simple job of putting the whole assembly back into the tank as before.  --> on dyno for some fuel presure testing.

Ha! Simple? Putting the pump back into the tank was by far and away the hardest part of the whole job! You need to bend the bracket backwards and to the right, because the 044 is too big to fit into the corner of the tank where the original comes from. When you stick your head in and look around you'll see what I mean. It's very hard to get the exact positioning, I just used trial and error. If someone has a proper formula for it please let me know!

The factory bracket needs the top metal tube snipped off, and also the bottom bit which holds the factory bracket in place. To compensate for the loss of this bottom part you can bend a lip onto the bracket above where you cut it so that it's got some support.

I took the top fitting on mine off, which is the part you're meant to get a banjo connector for. I couldn't find one anywhere so in the end one of the shops I was at said there was probably no reason I couldn't remove that ball bearing valve thing, so I tried and it was all good. Just bought some barb adapters for top and bottom, then hoseclamped the hoses and sock on.

JimX Grand Master

JimX

Posted
Posted

I took pics of the setup before I snipped anything off or bent anything into shape. This was before I realised that these 2 things were a must to be able to fit it. So all the pics I have are useless :D

Steve Grand Master

Steve

Posted
Posted

JNR24, I wrote up a detailed description on this a few months ago, do a search:)

Also, make sure you dont have too much petrol in your tank, and get some cardboard and trace around the stock pump and pickup - that way when you put it back together with the new pump, you can get the pickup in the exact spot it should be.

You will need some hose from the pump to the pickup, so get your self about 6" to fit the barb fitting for the bottom of the fuel pump - make sure its a tight fit, as teh stock pickup is smaller than the barb fitting so needs to be clamped in place too. You will also need about 12" of hose from the banjo connector on top of the pump to the fuel tank top. Once again use hose clamps (pressure).

Good luck, its not a bad job to do as long as you have the bits before you start, unlike me:)

JimX Grand Master

JimX

Posted
Posted
I was gonna put my 044 intake but was adviced from a reputable tuner that it will only last a few years intake then will cause problems!!

[pauline hanson]Please explain?[/pauline hanson]

JimX Grand Master

JimX

Posted
Posted

I think that 044 pumps aren't very reliable full stop. The amount of failures I've heard about has to be a pretty high proportion considering how few cars have these pumps. This is the first time I've heard that being in or out of the fuel makes a difference though. I guess all I can do is cross my fingers that mine is reliable.

As much as these pumps are, they are still cheaper than some. My sister's Festiva fuel pump died last year, and she was quoted over $900 for a replacement! Not including labour. She got a cheapie aftermarket one.

Cubes Grand Master

Cubes

Posted
Posted

How is the inconsistent noise of the 044 when its intank.

I've heard a few when they have been mounted out side and they have a really annoying surging sucking type sound, as its not getting enough petrol. for half a second its quiet then its loud again for a second then its quiet etc..

My external mounted 910 pump is the same on hot days after around 30mins of driving. Other than that it is quiet.

JimX Grand Master

JimX

Posted
Posted

The "surging" noise happens because Skylines have a variable resistor for the pump. When 100% fuel pressure is not required ie at idle or light cruising, it increases the resistance and the fuel pump slows down.

With the PowerFC it seems to vary this a lot more between simply "on" or "off" like the factory ECU does. It also seems to want to vary a lot even when just idling, so the noise becomes a bit more annoying and "groaning" kinda because it dips up and down rather than just clicking between high and low pressure like with the factory ECU.

Joel, if your pump does the same noisy thing when hot then I guess they all do it. Design flaw maybe?

predator Grand Master

predator

Posted
Posted
I was gonna put my 044 intake but was adviced from a reputable tuner that it will only last a few years intake then will cause problems!!

even if that is true, if you did it yourself you'd know its a 90min job to put a new one in, once you've modded your bracket probably less :D And i don't think the lifespan of even the stockie is that great to be honest..

Well, I've covered about 4000km with my Bosch 910 so far (mounted intank).. no problems, no noise, supplies fuel, does job. Still running stock ECU however. Meant to be fine for 250rwkw so it'll probably stay unless i have a reason to get something bigger.

The only time i hear it when its priming up at stop, when i switch to ACC

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