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Zardos
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Zardos Community Regular

Zardos

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I have found that the fuel rail is the same.

Now i have to decide what size injectors to go for. I was looking at sard 600cc or 700cc. The 700cc looks like good value for money so i might get them... Also i think i might need a bigger fuel pump.

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Omurru Veteran

Omurru

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How much power/what other mods have been done to the car and what do you plan on doing? If you move to too big an injector you will just find yourself wasting fuel. I have been told a good option for a mildly modified GTR is to use 13B injectors, there 550cc and will only set you back about $50 each second had from somewhere like promaz.

If you are wanting bigger injectors though yes you will need a better fuel pump, I am currentley going through the same process as you with my car just buying all the bits and bobs to upgrade the fuel system as it's currentley whats limiting my car at the moment ;)

BTW are you the guy from shafted lan? Just the same nick that all :P

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Zardos Community Regular

Zardos

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This is what I have done so far.

Garrett Gt 25-60R turbos

Full 3 inch zorst from turbos back

PFC

Splitfire Coils- (only because my old ones where a bit stuffed)

High flow panel filter

Nismo Adj fuel reg

I’m getting the PFC tuned atm as I just got it and plan on running 14psi of boost. My tuner suggested that I get some bigger injectors so that's why i'm asking, and I thought while i’m at it I should sort out the rest of the fuel system.

Also I do want to get some adj cam pulleys soon too.

I don't to to go more then 350rwkw as I don't want to push the stock internals to much.

My last tune on stock ecu I was getting 241rwkw at 10psi.

I don't know who shafted lan is, Zardos is also my online game name. ;)

Edited by Zardos
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Omurru Veteran

Omurru

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I'm in the same boat as you then, i'm making about 300kw and the stock fuel system is pretty much maxed out. if you don't want to go more than 350kw 550-600cc injectors would be heaps and perhaps an 040 or something in the tank to suit. There's a thread around somewhere as well that shows how to rewire the fuel pump to provide it with the correct 13.8V instead of whatever it normally recieves which might be of some intrest to you also. The other thing to check is the flow rate of the standard fuel filters as this might also have to be replaced with something a little more high flowing.

I'm looking at doing a little more with mine, surge tank etc. I want to get bigger turbos down the track as I am still running stockies but I think in the end it all comes down to your budget.

Ah ok, nah it's just I know a guy that uses the same name as his online name too :thanks:

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Zardos Community Regular

Zardos

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Hey thanks for your advice it really heaps when someone els is in the same boat as you which makes it more easy to workout what works best.

Iam looking at the some right now and there are 540cc twin hole spray injectors and 550cc single hole spray injectors. Do you know if the twin hole will fit straight into the fule rail without moding, Also what different between them.

Also the 700cc from nengun are cheaper then 650cc,550cc,540cc and 530cc. This is why i was looking at the 700cc. So if i put 700cc won't i have less duty then using something smaller?

Edited by Zardos
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Omurru Veteran

Omurru

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I have no idea about the difference between the single and twin hole spray injectors, i thought they just all had 4 holes that they spray out of?

I'm not sure the exact downfalls of putting in too big an injector, if you put in big ones and get it tuned for them i can't see there being a problem but people still seem to say don't go too much overkill. I think it's more if you put in bigger ones and don't get it tuned you will be pumping in too much fuel which is knida obvious to anyone i would think :)

Have a talk to Racespec there on this forum but they have pretty good prices on Sard injectors, about 900 for 700cc ones and a little less for smaller ones.

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