1G Injector Limit

[BLK1g-gte]

Hey people been searching the forums old and new and can't seem to find a definet answer to this so what is the limit to the standard 1GGTE injectors. These are the pale green ones:

From the old forum the the injector size varies from:

245cc to 315cc:

What is the capability. Chasing a bit over 200rwkw from them???

[Jackel]

can't help with your answer but why not just go 7mgte injectors?

[BLK1g-gte]

Yeah thats what i am going to do. I am going down tomorrow to get some of a Cresida. From what i heard they just bolt in...

[Jackel]

yep heard they are bolt in aswell, need to get my hands on some

[BLK1g-gte]

Hang on do they need to be the one of the 7mgte turbo or are the na
7mge fine

[IN 05 NT]

you need the 7mGTEEEEEE, as they are 440cc's the GEEEE wouldnt be any bigger than the 1g ones

i mad 195rwkw with factory, clean inj's.... dont think i would want to push them much harder then that, before they would start to lean out....

[BLK1g-gte]

Hmm by the look of the injector chart the 7mgte one are low imp and mein are high in at 13.8ohms. What now???

How far will a fuel pressure reg. get me with the stock injectors????

[BLK1g-gte]

I been digging up more info. As it stands my Injectors are
315 high impedance and rated @ 290kPa. Each injector can support 63hp or a total maximum of 380hp at the fly at max duty cycle. Now i know you don't want to run them above 85% duty cycle.
So don't know how much the above equates to the rear wheels but if I have a loss of say 100hp and I use a Aftermarket fuel press. reg and squize a bit more out of them it might be ok 200 to 210rwkw . Opinions???
Also do you need to change to a hi-flo pump to use a adj. fuel press reg? This I am unsure of.

[chris davey]

low impedance you use resistor packs. i am not sure but maybe the 7m's use them if their ecu requires low impedance also.

[mrshin]

Low impedance injectors shouldn't be a problem, because you won't be able to use much bigger injectors on your stock ECU anyway, therefore will have to do something about that...

Whatever you do, you need a decent fuel pump - if you're using an old, factory pump then it's time for a change. If you do try and play around with fuel pressure, then do the pump first, and keep the pressure sensible - i.e. don't go trying to run 100psi or something silly like that.

[BLK1g-gte]

Thanks for the info..
I have a Apexi neo (16point fuel adjustment) to lean or rich the fuel. Std are high impedence so i would have to use a resistor on each injector wire to use 7mGTE ones.. How much can i get out of a ajd fuel press regulator flow wise out of the stock ones???

[oldeskewltoy]

not sure this will help or not... found this injector site a year or so back......
http://users.erols.com/srweiss/tableifc.htm

[Kyosho]

Personal opinion:
With the right fuel pump, and a good pressue reg, you'll be able to make a fair wack of power.
A mates RB25DET on stock injectors made 500RWHP.
He did have a good pump, and had upped fuel pressure.

So if you are game enough to, run them. You can squeeze them a bit more by raising the pressure.

[Forcefed6]

Personal opinion:
With the right fuel pump, and a good pressue reg, you'll be able to make a fair wack of power.
A mates RB25DET on stock injectors made 500RWHP.
He did have a good pump, and had upped fuel pressure.

So if you are game enough to, run them. You can squeeze them a bit more by raising the pressure.

No offense, but I find that very hard to believe. Even with stupid am amounts of fuel pressure and a good pump, it is near impossible to SAFELY make 500rwhp with 6x370cc injectors.

[chris davey]

I agree with the above.

Also, I have been told that upping the pressure on side feed injectors is not a good idea. Hmm, now that I think about it I don't know if 1g's and 7m's are side feed or not?

Still a hell of a lot better idea to get a fuel pump that can pump the amount of fuel required and injectors that can squirt the amount required and run the whole fuel system at the pressures it was designed to.

If you are upping the boost then you are already running higher pressure than stock.

If you want 200kw at the wheels, 440's will do that easily. 380's on a 1jz can make up to 250rwkw or so (stock FPR) and I have seen 440's make 290rwkw.

Ideally, I think you should have around 380cc also. Having a SAFC, it is limited by the amount of sender bending it can do so if your injectors are way too big it won't be able to get a good tune. Plus idle will be hard to sort out for the stock ecu I would think running closed loop with injectors that are 40% bigger.

If the 1g uses top feed then you can get them cheap from a place called injectorsonline I think it is.

A run of the mill walbro 255 will be more than adequate for 200rwkw so I would just get one of them.