700cc Injectors & Bosch 044 Intank Fuel Pump

[Marko R1]

hi guys,

as im getting my engine rebuilt im not sure if my fuel system will be a bottleneck for over 400awkw...i have 700cc injectors & single bosch 044 fuel pump.

should i upgrade these or leave as is?

regards

[R33GOD]

it should be fine for 400rwk.

[T88 ON BOARD]

I had the exact same Fuel gear (700cc + 044 in tank + nismo reg) back in the day

Maxed out @ 365awkw @ CRD

You will definitely need to upgrade for 400awkw +

[R31Nismoid]

800cc will be fine.. I will be using them for 400rwkw no dramas. 700's will get near on 400 with a minor rail pressure increase

could have searched

http://www.skylinesaustralia.com/forums/In...wk-t264769.html

[Marko R1]

ok - i will upgrade my injectors to 800cc or more

how about my fuel pump, is it enough? i really dont want to run an external surge tank with an eloborate fuel system in the boot (just more reason for police to pick on me) as i want my setup to look as standard as possible

[T88 ON BOARD]

I dont think the Injectors are the only problem though

I would do an external set up to be sure...Doesn't have to be over the top but anything will help

[N1GTR]

ok - i will upgrade my injectors to 800cc or more

how about my fuel pump, is it enough? i really dont want to run an external surge tank with an eloborate fuel system in the boot (just more reason for police to pick on me) as i want my setup to look as standard as possible

Even if you go for 1000cc injectors, the fuel pump will be the bottleneck.

To not run a surge tank in the boot there are a couple of options;

-Put the surge tank somewhere else

-Run the second pump intank (this is a bit of fu(king around though)

[Marko R1]

is there a 'bolt on' fuel system kit available, i.e. 2 pumps & surge tank?

or do i need to customise this?

[T88 ON BOARD]

Make something up...

Doesn't need to be fancy just a small surge tank with an external 044 with bigger fuel line

Done Problem solved

[SimonR32]

intank 044 and 800cc injectors made 430rwkw on my old gtr

intank 044 and 700cc made over 450rwkw in another gtr over here

just need to make sure your getting full voltage to fuel pump

[Marko R1]

intank 044 and 800cc injectors made 430rwkw on my old gtr

intank 044 and 700cc made over 450rwkw in another gtr over here

just need to make sure your getting full voltage to fuel pump

that is interesting - i'll speak to my tuner tomorrow for confirmation

less headache for me if i kept my fuel system as is

[Piggaz]

Previous owner of my car maxed out 700 CC sards at 1.6 bar on GT RS's (I think) . Went to 800 CC sards and its fine.... Still using single in tank Nismo pump. Get the 800's! It might be worth throwing a fuel pressure gauge to make sure its staying rock solid up top.

Edited April 13, 2009 by Piggaz

[DCIEVE]

I've got an external 044 and 700's with over 400rwkw, original tuner said it was unsafe (inj. duty cycle) and recommended I upgrade before hitting the track - second tuner said it was fine. Both are well respected so obviously your going to get different answers!

Personally I'd prefer the headroom and will be going bigger.

[Marko R1]

have you guys had much to do with the bosch 1000cc injectors or better stick with sard?

i thought that bosch own sard?

[N1GTR]

Ive got 1000cc's. They're just like 700's, but not.

[ZILR-34]

800cc injetors

023 intank bosch pump 800hp(new on the market) looks like the 040 with the filter on the bottom

and run new 1/2inch fuel lines (12.7mm)

and adj reg

maybe upgrade fuel rail

if that doesnt work. go for a 1200hp holly fuel pump with 1inch lines and 1000cc injetors

get ur setup right and u wont need a surge tank

[Angus Smart]

I just bought 2 044's

But i have a tomei rail 800cc sards

and still need to buy a reg..

going to do a surge tank setup tho.

[N1GTR]

I just bought 2 044's

But i have a tomei rail 800cc sards

and still need to buy a reg..

going to do a surge tank setup tho.

Dude, you NEED to see my car before you go down that path

[Angus Smart]

Yee you probably would be right what have you done?

[den001]

have you guys had much to do with the bosch 1000cc injectors or better stick with sard?

i thought that bosch own sard?

siemens injectors, best spray pattern, no offence to every1 runing sards, but compared to siemens they are like a fire hydrant