Jump to content
SAU Community

Recommended Posts

Isnt the 044 pump a EXTERNAL FUEL PUMP?or are you guys saying its easily done do to put it inside the tank?abit confused :/

GTR r32 btw

Ive lost count of the GTRs using 044's without problems.

Being external doesn't mean anything in this instance.

There is a DIY on these forums about it, have a search.

You'll probably get one for $230 delivered, they're renowned around the world to be a good pump, and easily do enough flow for when you rebuild your engine later on (and of course will do your current target), so I don't see why you'd bother with denso. 044's are available from sau forum sponsors very easily. I have a feeling denso are used in supras-I'll find out soon enough when upgrading mine

Had a 044 in tank setup in my old 32GTR. Had to spend more $$$ on fittings.... They work well and I never had any issues with it being the only pump and in tank.

Just bought a Nismo fuel pump for the 34. Paid about $450 for it, drop in replacement. 9615 is the only number on the pump itself, and came with nismo paperwork, in Japanese of course...

I have been told they are the same as Denso, made by Denso as well.

post-12712-0-82977800-1311248007_thumb.jpgpost-12712-0-41484500-1311248016_thumb.jpg

Only bought it because I wanted a new/fresh pump and drop it in.

Tuner (with a 7 second R32) just told another customer with a GTR looking for 400kw to replace his Nismo with a Bosch 044 intank (no surge tank) because " the Nismo drops off at high boost"! (he was at the time giving a second opinion after another tuner told him the same!).

Define 'high boost' we talking 20psi or 40psi?

Plenty of cars running 400rwkw with a Nismo on 20-22psi with a 2.8-3ltr.

For anyone interested i did digging the other day with some actual flow test data.

http://www.stealth316.com/2-fuelpumpguide.htm

Factory GTR pump flow: 230L/hr @ 72psi (13.5V)

So lets assume a Nismo pump is the same as stock GTR pump (its 25% more apparently, I have reason to think its the same, thats for another discussion)

Bosch Flow Rate PDF (63kb).

Bosch 044: 200L/hr @ 72psi (12V)

So clearly the Bosch if wired up @ 13.5V will flow more, and that overall the Bosch would be the better pump - I'm sure we can all agree on that.

Bosch/Nismo, pretty close. Bosch will flow more @ 72psi, but it's not huge amounts.

nismoid. that test is a bit off. no way does a nismo pump flow the same as a stock GTR pump..... they flow 276l/ph stock around 200 and bosch 044 around 230.

No it's not. Nismo pumps, according to their spec sheet - flow 276l/ph @ 3.0kg/cm2 !!!

3.0kg/cm2 = 42psi, pretty much stock rail pressure.

Add more pressure, it totally changes the game. No one runs 42psi fuel pressure on a boosted application.

If you look at the testing - its at 72psi not 42psi. The flow rate is nowhere near 276l/ph once you add 20psi.

The Bosch is also tested @ 72psi, so it's comparing on a even playing field. Not Nismo's pointless specification.

nismoid, they are tested at 3bar as all modern EFI systems are a 3 bar system. ie base pressure of 3bar (2.5bar with engine running). that is factory pressure. I don't run increased pressure on my cars. why on earth would you? 72psi base pressure is nuts. I run standard 3bar base ( which = 36psi at idle). add say 20psi boost and I still only get to 60psi or so at max boost. most pumps are quoted/rated at 3bar. it's an industry standard. the other question is voltage. vary voltage up and down and figures go all over the place. same with pressure. if anything the nismo rating is conservative compared to other pump ratings and in my experience they will outflow an 044 by miles. and they most certainly do not flow the same as a stock GTR pump.....

Not really sure what you are getting at in the above. The statement made, Nismo drops off @ high boost, was quite simple.

Hence the use of 72psi, equal to around 30psi boost give/take.

Talking about 3bar/EFI standards is nice, but effectively pointless in this discussion.

There is no actual flow data anywhere around for a Nismo pump @ anything other than base rail pressure, which is utterly useless. Standard or no standard it offers nothing to help confirm/deny.

Until someone actually has Nismo flow data, it's just speculation. You cannot say for certain that @ 60-70psi the flow is still 25% more (what Nismo quote @ base). It could indeed drop off making the comment valid.

All my post did was seek to give an idea of the comments validity.

  • 4 weeks later...

Soon I will have the following parts added to my NUR:

(Mind you already has cam gears, HKS actuators, full exhaust and obviously the N1's.)

Nismo fuel pump

Nismo fuel reg

Power fc D-jetro

Blitz sus power pods (already have full greddy piping kit)

HKS evc-s bc

Sard 800c injectors

Nismo twin copper mix

Hope to run 20-22psi as well. We shall see what power it makes.

Only question that remains is should I get set of split fire coils or HKS twin power DLI II?

Work is going to be done at racepace

Soon I will have the following parts added to my NUR:

(Mind you already has cam gears, HKS actuators, full exhaust and obviously the N1's.)

Nismo fuel pump

Nismo fuel reg

Power fc D-jetro

Blitz sus power pods (already have full greddy piping kit)

HKS evc-s bc

Sard 800c injectors

Nismo twin copper mix

Hope to run 20-22psi as well. We shall see what power it makes.

Only question that remains is should I get set of split fire coils or HKS twin power DLI II?

Work is going to be done at racepace

Ring Chris and ask him what he wants/likes seeing that Racepace is doing the work.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Also had a look at the Nissan JP website looks like the 400r has a slightly shorter ratio than than the regular V37 3.133 VS 2.937 which from a guy who has driven both 3.69 vs 4.11 ratios in the S15 is bugger all. Seems that the AUTO Z runs the same ratio as the 400R but can't find any info as to if its an open or LSD? More often than not the auto LSD is open
    • Do not replace the power steering lines with this stuff. If it's anything like the Chase Bays stuff it will leak and be worse than stock. The reason why the reservoir is on the LH/passenger side of the car is because that's just where the reservoir was most convenient to fit. Don't overthink this stuff. The intake/cold side of the engine is pretty busy on these cars. And again, the hardpipe is designed to be a janky power steering cooler. In theory you can replace it with a real power steering cooler but that's really only for track use where boiling the fluid is a distinct possibility. Start with the low pressure lines feeding the pump from the reservoir. Make sure there isn't a bunch of junk in the reservoir filter. Be careful to not get ATF all over the engine bay. I hate dealing with ATF spills, you can clean it up and the slightest crevice will still release more oil that can still drip over time. You also want to inspect for leaks before you make a mess and can't tell what happened. Most likely you have a leak somewhere that is allowing fluid out and air in. Failing that it's allowing air in but not fluid out. Only place I can really see that happening is on the low pressure side because the pump will pull a slight vacuum to draw fluid in. Everything after the pump is high pressure or lower pressure, approaching atmospheric by the time it returns to the reservoir.
    • I did a skidpan night at SMSP this week, it was much cheaper than $350. But yeah, you need to slap an LSD in that thing.  I put an OS Giken in the 370Z and it's f**king MARVELOUS even compared to Nissan's viscous LSD. So you're saying it's free now that it's a housing estate? 😂
    • Nah, the car seems to run exactly as it did prior, in saying this it does "seem" to be better down low, like more eager to rev, but that may be 100% placebo effect from intake noise But, I'm not worried about it at all, in the end it is a fairly low compression NA engine that has a well shrouded intake,  if it is getting hotter IAT I cannot notice anything negative performance wise from the seat of my pants thrashing it about on the street or sitting in traffic, so meh, car now now makes induction noise so I'm happy
    • Do you have an IAT sensor? It's worth checking it to see. You may be suprised how little gap you actually need to flood your engine with hot air. (I tape up my airbox for a reason) :p
×
×
  • Create New...