Upgrading Gtr Injectors And Fuel Pump

[rhysc1986]

looking at upgrading my injecotrs and fuel pump b4 i get a tune and needing advice

in tank vs external which better? walbro vs bosch? looking for something that will fit in relatively easy without paying 3+ times the price to get a nismo one that will drop straight in.

what size injectors needed?

looking for 300awkw max but prob for better fuel ecomony and reliability will go closer to 250awkw.

[DVS JEZ]

have a search on the forums, there is a alot of good information on here.

[SiR_RB]

I went with sard fuel pump and nismo 600cc injectors...plenty to support my goal of 300kw.

[Ziller]

Was...running 302rwkw with standard injectors and fuel pump.

[DVS JEZ]

I have tuned a gtr 312kw stock injectors but a fuel reg.

250 kw is nothing for stock inj. Just get a fuel pump

[R31Nismoid]

300rwkw you might find will be OK with stock injectors. Some cars are, some aren't so as Jez said - just go with a fuel pump for now mate.

If you need them, get them. Otherwise you can tune to 280/290rwkw and save $700-$900 (purchase/fitting).

What turbos do you have? 300rwkw means non factory so you could probably make more if you did get injectors, you will need AFM's though.

[pistol-pete]

go the nismo pump if you do decide to upgrade. straight drop in replacement and will handle up to about 750hp

[rhysc1986]

not really keen on spending $600 on nismo pump which is more than 3 times price of bosch or walbro pump just coz its bit easier to install. from sounds of it unless i find a cheap set of injectors stick to what i got coz from what i can see like $600 sard 550cc injectors though the price to go to 1000cc injectors isnt much more.

so for fuel pump in tank vs external which better? walbro vs bosch? looking for something that will fit in relatively easy without paying 3+ times the price to get a nismo one that will drop straight in.

i got the N1 turbos, i tired searching several different topics nothing seems to come up but i get this alot guessing im just not using right words.

[Don Dada]

I have tuned a gtr 312kw stock injectors but a fuel reg.

250 kw is nothing for stock inj. Just get a fuel pump

What base pressure and afr bro?

But yea 250awkw is poossible with stock 444cc inj, even a little more......I'm doin roughly that now with them at 88% duty with 11.0 afrs,,,,and i'm sure your tuner wouldnt go that rich

Oooh ....an a walbro pump too....not in a gtr tho so i'm not sure about fitment

[KiwiRS4T]

Get a Denso fuel pump. They are only $350NZ so should be about AU$300.

[DVS JEZ]

What base pressure and afr bro?

But yea 250awkw is poossible with stock 444cc inj, even a little more......I'm doin roughly that now with them at 88% duty with 11.0 afrs,,,,and i'm sure your tuner wouldnt go that rich

Oooh ....an a walbro pump too....not in a gtr tho so i'm not sure about fitment

I tuned it at 11.5 afr. I never set the base pressure myself so i can answer that one sorry.

Inj hit 105%

[N1GTR]

Bosch 044. Easy enough to install intank and will do your power no worries

[Thelen]

+1 040. Or Walbro 255L

Edited April 8, 2011 by Thelen

[Don Dada]

Inj hit 105%

It actually gives a reading over 100%??? What ecu?

[DVS JEZ]

power fc, the injectors were set at 105%

[rhysc1986]

Bosch 044. Easy enough to install intank and will do your power no worries

isnt 044 a external pump and the 040 the internal bosch?

whats pros and cons internal vs external?

[N1GTR]

Correct. Its all been covered on here over and over

[sucram]

There is a new fuel pump, just released not long ago. It flows nearly 350lph at 45psi. 290lph @60psi all at 13.5v.

Basically it flows just over 30% more then a failbro 255, denso etc.@ 13.5v. As another comparison

the walbro and denso need 16.5v to run close to this pump at its 13.5v flow on 0.7 SG.

Nismo quotes 276lph @ 3 Bar pressure, no SG or voltage quoted

The only downside I can see is that it will probably surge on under 1/4 tank on a bnr32- more of a design prob of the

tank then pump.

Its a 100% drop in, in tank pump and the best part is, cost is about $250

I will be getting mine in a few days and post findings

[Thelen]

What brand? Anyone needing more than 255LPH is going to be aiming for serious power and won't care about a couple hundred $$ saved, and will probably NOT skimp on it given how much was spent on the engine.

But, see how it goes

[rhysc1986]

There is a new fuel pump, just released not long ago. It flows nearly 350lph at 45psi. 290lph @60psi all at 13.5v.

Basically it flows just over 30% more then a failbro 255, denso etc.@ 13.5v. As another comparison

the walbro and denso need 16.5v to run close to this pump at its 13.5v flow on 0.7 SG.

Nismo quotes 276lph @ 3 Bar pressure, no SG or voltage quoted

The only downside I can see is that it will probably surge on under 1/4 tank on a bnr32- more of a design prob of the

tank then pump.

Its a 100% drop in, in tank pump and the best part is, cost is about $250

I will be getting mine in a few days and post findings

would like more info on this pump and also you findings