Bosch 044 pump in-tank? - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

frostmotorsport · 18th July 2008, 12:09 AM

hi all - pretty much as above really!! can the 044 pump be mounted in-tank? If so, is it hard or just clip it to the old mount and away you go?

I haven't pulled my old pump out and don't (yet) have an 044 to look at either, so just curiosity more than anything - as I'm thinking of buying an 044. Was going to go Walbr 255lph but from what I've read on here, they aren't all that and over 1bar of boost you should have 280+ lph pump...

and no, I'm not going to put a 2nd standard pump in the tank... nor do I want a swirl pot. It's a road car, and the boot is for luggage, not fuel systems.

(waits for flame replies....)

GT-R Glenn · 18th July 2008, 12:22 AM

An o44 will work , but will not go in without a lot of dicking around.
Its quite a lot biggert than the standard one and needs lots of bits adapted to fit.

If you want an intank go with the Nismo pump, drops straight in and is rated close to the 044.

freakazoid3 · 18th July 2008, 12:22 AM

Yes it is possible (thought there was an how-to on skyineowners somewhere...

)
I am going to put a Bosch 044 in tank in my r32 to when I upgrade her.
It does take some fiddling with the lines and the brackets which hold the pump assembley though but some DIY will sort it

freakazoid3 · 18th July 2008, 12:23 AM

Damn Glenn I guess you typ just a few seconds faster then me

frostmotorsport · 21st July 2008, 03:29 AM

Quote:

Originally Posted by GT-R Glenn

Its quite a lot biggert than the standard one and needs lots of bits adapted to fit.

If you want an intank go with the Nismo pump, drops straight in and is rated close to the 044.

Any clues on which bits? Are the lines different diameter or in a different place? Modifying the bracket or making a new one is not a problem, neither is wiring etc - I do motorsport fabrication so most things aren't an issue!! - and there is a cheap-ish one on tardme at the moment so thinking it might be the go, rather than paying a premium (in this country anyway) for a Nismo bolt-in replacement!!

cheers.

GT-R Glenn · 21st July 2008, 03:57 AM

Well its not rocket science,
I think the filter arrangment and how it is held in the tank
It probably wont be all that challenging for you, but Yodes said he would NEVER do one like that again, too much dicking around.

Yeah Ive seem them down to $370 which is really cheap....Im really tempted to buy another one and run two side by side....

Just do it....

Check PM

mambastu · 21st July 2008, 10:45 AM

Fitted an 044 to my 32 GTR a few months ago and it wasn't too involved but you really need the use of a die grinder or dremel to modify the pump carrier as the 044's a much bigger pump than the standard pump as mentioned previously.

I ditched the top half of the plastic pump carrier and then trimmed the bottom half of the carrier to allow the 044 to sit on it. Had a spare piece of samco which I slid onto the pump to insulate it from the carrier and then wrapped a couple of jubilee clips around the whole assembly to hold it all together. The standard Nissan in-tank filter is specially shaped to sit at an angle in the bottom of the pump carrier so a universal Bosch filter won't fit and to get around that I bored out the plastic end fitting slightly so that it pushed on the alloy fitting that came with pump.

I was expecting it to be really noisy compared to the OEM pump but the sleeve of samco insulates it nicely.

kismetcapitan · 17th August 2008, 11:50 AM

I just blew one of my pumps I think - I have checkvalves now, these sweet (and pricey!) Aeromotive -6AN checkvalves right on each end on the fuel rail. I did this so that one pump could fail and the other would keep the car running.

And indeed, I noticed when the pump (or in-tank hose) failed - the base fuel pressure dropped 0.2bar. A test showed that the car can no longer maintain fuel pressure at 1.5bar boost - the same problem that had me go to twin pumps.

I need to check the hoses, but I blew out a pump just 2000km ago and so I think it happened again. These Apexi pumps actually don't break, but the relief valve breaks and so the pump just spills fuel back into the tank.

Does anyone know if the valve can be rebuilt?? Or maybe I should just epoxy the relief valve shut. What sort of bad things would come of that?

But more on topic, I think I'm just going to slap a Bosch 044 on. Installing a second pump was pretty easy - spliced it into the wiring, then just piggybacked it onto the main pump with some cable ties.

I need to empty the tank first though - swimming around in fuel sucks. I have a built-in solution for that - my last broken Apexi pump, I epoxied the relief valve shut and wired it to the battery. Stuck some hoses on either end and it's now a utility pump in my boot - useful for electrically pumping anything (I installed it to pump toluene from the cans I get it in to the fuel tank), but it would work just as well in draining the fuel tank into a drum, or any number of other applications

Does the Bosch 044 have a relief valve? How hardy are they? My pumps run at full voltage all the time, and I'm thinking I should rewire my pumps back into the stock wiring so that at low RPM they're not running full tilt - and hopefully gain some more life!

mifn21 · 17th August 2008, 12:31 PM

If you do a search in the DIY section at skylinesaustralia.com there are a couple of step by step guides to fitting an 044 in tank

mifn21 · 17th August 2008, 12:43 PM

Forums back up so here's the links

'the Other Bosch 044 Intank + Bnr32 Thread' - Skylines Australia

http://www.skylinesaustralia.com/for...01.html&hl=044

kismetcapitan · 17th August 2008, 12:45 PM

cheers mate, thanks!

Asim R32GTR · 17th August 2008, 03:02 PM

Quote:

Originally Posted by frostmotorsport

Was going to go Walbr 255lph but from what I've read on here, they aren't all that and over 1bar of boost you should have 280+ lph pump...

Hmm... how did i make 555hp at the hubs with 1.8bar boost with only one walbro fuelpump in the tank then?

Asim

frostmotorsport · 18th August 2008, 12:09 AM

not arguing there Asim! just recanting what I've read as "popular opinion" - my thing is, if I'm going to spend $$$, then I want to get it right first time - even if it costs more initially.

but it's interesting to know that a 255 can support over 550bhp at the hubs!!!

SamuraiSam · 18th August 2008, 12:14 AM

Quote:

Originally Posted by Asim R32GTR

Hmm... how did i make 555hp at the hubs with 1.8bar boost with only one walbro fuelpump in the tank then?

Asim

You got lucky. What a terrible, terrible choice for a fuel pump on a 500+whp car.

Asim R32GTR · 18th August 2008, 12:42 AM

Quote:

Originally Posted by frostmotorsport

not arguing there Asim! just recanting what I've read as "popular opinion" - my thing is, if I'm going to spend $$$, then I want to get it right first time - even if it costs more initially.

but it's interesting to know that a 255 can support over 550bhp at the hubs!!!

No worries mate, im just sharing my experience with this.
I have used the same pump on other cars also, s14 / 13, evo, supra etc
All cars made around 600-650hp.

Yeah i know it maybe at the max of the pump, but every single dyno session we have had no issues what so ever with fuel pressure.

18th July 2008, 12:09 AM	#1 (permalink)
frostmotorsport GTR Register Member Join Date: Aug 2007 Location: Wellington, NZ Posts: 784	Bosch 044 pump in-tank? hi all - pretty much as above really!! can the 044 pump be mounted in-tank? If so, is it hard or just clip it to the old mount and away you go? I haven't pulled my old pump out and don't (yet) have an 044 to look at either, so just curiosity more than anything - as I'm thinking of buying an 044. Was going to go Walbr 255lph but from what I've read on here, they aren't all that and over 1bar of boost you should have 280+ lph pump... and no, I'm not going to put a 2nd standard pump in the tank... nor do I want a swirl pot. It's a road car, and the boot is for luggage, not fuel systems. (waits for flame replies....)

18th July 2008, 12:22 AM	#3 (permalink)
freakazoid3 GTR Register Member Join Date: Jan 2008 Location: Sunny Belgium...right :) Posts: 849	Yes it is possible (thought there was an how-to on skyineowners somewhere...) I am going to put a Bosch 044 in tank in my r32 to when I upgrade her. It does take some fiddling with the lines and the brackets which hold the pump assembley though but some DIY will sort it

21st July 2008, 10:45 AM	#7 (permalink)
mambastu GTROC Member Join Date: Feb 2002 Location: West Sussex Posts: 626	Fitted an 044 to my 32 GTR a few months ago and it wasn't too involved but you really need the use of a die grinder or dremel to modify the pump carrier as the 044's a much bigger pump than the standard pump as mentioned previously. I ditched the top half of the plastic pump carrier and then trimmed the bottom half of the carrier to allow the 044 to sit on it. Had a spare piece of samco which I slid onto the pump to insulate it from the carrier and then wrapped a couple of jubilee clips around the whole assembly to hold it all together. The standard Nissan in-tank filter is specially shaped to sit at an angle in the bottom of the pump carrier so a universal Bosch filter won't fit and to get around that I bored out the plastic end fitting slightly so that it pushed on the alloy fitting that came with pump. I was expecting it to be really noisy compared to the OEM pump but the sleeve of samco insulates it nicely. __________________ Cheers Stu R32 GTR - Godzirra Twin turbo RB25'd 200SX RS13 - 405bhp and 348lbs ft on 15psi

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18th July 2008, 12:22 AM	#2 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,302	An o44 will work , but will not go in without a lot of dicking around. Its quite a lot biggert than the standard one and needs lots of bits adapted to fit. If you want an intank go with the Nismo pump, drops straight in and is rated close to the 044.

18th July 2008, 12:23 AM	#4 (permalink)
freakazoid3 GTR Register Member Join Date: Jan 2008 Location: Sunny Belgium...right :) Posts: 849	Damn Glenn I guess you typ just a few seconds faster then me

21st July 2008, 03:57 AM	#6 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,302	Well its not rocket science, I think the filter arrangment and how it is held in the tank It probably wont be all that challenging for you, but Yodes said he would NEVER do one like that again, too much dicking around. Yeah Ive seem them down to $370 which is really cheap....Im really tempted to buy another one and run two side by side.... Just do it.... Check PM

17th August 2008, 11:50 AM	#8 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,608	I just blew one of my pumps I think - I have checkvalves now, these sweet (and pricey!) Aeromotive -6AN checkvalves right on each end on the fuel rail. I did this so that one pump could fail and the other would keep the car running. And indeed, I noticed when the pump (or in-tank hose) failed - the base fuel pressure dropped 0.2bar. A test showed that the car can no longer maintain fuel pressure at 1.5bar boost - the same problem that had me go to twin pumps. I need to check the hoses, but I blew out a pump just 2000km ago and so I think it happened again. These Apexi pumps actually don't break, but the relief valve breaks and so the pump just spills fuel back into the tank. Does anyone know if the valve can be rebuilt?? Or maybe I should just epoxy the relief valve shut. What sort of bad things would come of that? But more on topic, I think I'm just going to slap a Bosch 044 on. Installing a second pump was pretty easy - spliced it into the wiring, then just piggybacked it onto the main pump with some cable ties. I need to empty the tank first though - swimming around in fuel sucks. I have a built-in solution for that - my last broken Apexi pump, I epoxied the relief valve shut and wired it to the battery. Stuck some hoses on either end and it's now a utility pump in my boot - useful for electrically pumping anything (I installed it to pump toluene from the cans I get it in to the fuel tank), but it would work just as well in draining the fuel tank into a drum, or any number of other applications Does the Bosch 044 have a relief valve? How hardy are they? My pumps run at full voltage all the time, and I'm thinking I should rewire my pumps back into the stock wiring so that at low RPM they're not running full tilt - and hopefully gain some more life!

17th August 2008, 12:31 PM	#9 (permalink)
mifn21 GTROC Member Join Date: Mar 2007 Location: London Posts: 2,128	If you do a search in the DIY section at skylinesaustralia.com there are a couple of step by step guides to fitting an 044 in tank

17th August 2008, 12:43 PM	#10 (permalink)
mifn21 GTROC Member Join Date: Mar 2007 Location: London Posts: 2,128	Forums back up so here's the links 'the Other Bosch 044 Intank + Bnr32 Thread' - Skylines Australia http://www.skylinesaustralia.com/for...01.html&hl=044

17th August 2008, 12:45 PM	#11 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,608	cheers mate, thanks!

18th August 2008, 12:09 AM	#13 (permalink)
frostmotorsport GTR Register Member Join Date: Aug 2007 Location: Wellington, NZ Posts: 784	not arguing there Asim! just recanting what I've read as "popular opinion" - my thing is, if I'm going to spend $$$, then I want to get it right first time - even if it costs more initially. but it's interesting to know that a 255 can support over 550bhp at the hubs!!!