Jump to content
SAU Community

Recommended Posts

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.

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.

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.

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

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%

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

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 :)

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

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

    • Or, is it a case of what it is like owning an R series Skyline? NFI what the previous owner has done or fiddled with... Ha ha ha After reading through this thread, I went on a bit of a research about the Q50/Q60. Now I'm quite intrigued by them! Is the AWD in them more like a WRX where it's always AWD, or is it more like the ATTESSA in the GTRs? By the sound of this TCU tuning, this sounds like a case of someone has made some real software for it, and you just need the right piece of hardware, and then you license that specific vehicle/TCU. Or is this a case of the software will be really expensive so only a few tuners have it, and you still have to pay a license per vehicle?
    • By popular demand.. it was a coil. Got my hands on 1 new OEM coil, replaced with the one that made the less noise difference when I unplugged it while the car was running and started the car up. No stutter and the engine light was gone. I guess I’ll buy the other 5 they have lol
    • No, code 21 is very straightforward. It can only be the things described in that diagnostic flow. In fact it has no way of knowing that the spark plug resistance is out of spec.
    • Hi, SteveL Thank you very much for your reply, you seem to be the only person on the net who has come up with a definitive answer for which I am grateful. The "Leak" was more by way of wet bubbles when the pedal was depressed hard by a buddy while trying to gey a decent pedal when bleeding the system having fitted the rebuilt BM50 back in the car, which now makes perfect sense. A bit of a shame having just rebuilt my BM50, I did not touch the proportioning valve side of things, the BM50 was leaking from the primary piston seal and fluid was running down the the Brake booster hence the need to rebuild, I had never noticed any fluid leaking from that hole previously it only started when I refitted it to the car. The brake lines in the photo are "Kunifer" which is a Copper/Nickel alloy brake pipe, but are only the ones I use to bench bleed Master cylinders, they are perfectly legal to use on vehicles here in the UK, however the lines on the car are PVF coated steel. Thanks again for clearing this up for me, a purchase of a new BMC appears to be on the cards, I have been looking at various options in case my BM50 was not repairable and have looked at the HFM BM57 which I understand is manufactured in Australia.  
×
×
  • Create New...