R33 Gtr, Are My Injectors Maxing At 208awkw?

[GD51LA]

I want to fit cam gears, but my tuner tells me that my gtr has almost maxed out the standard injectors, how? she only has a humble 208awkw?

If that's the case, will a fuel reg fix it? Which one, does it have to be adjustable?

Is using a reg a bandaid fix for maxed out injectors? How?

R33 gtr, power fc, pod filters and 14.5psi

[usmair]

I want to fit cam gears, but my tuner tells me that my gtr has almost maxed out the standard injectors, how? she only has a humble 208awkw?

If that's the case, will a fuel reg fix it? Which one, does it have to be adjustable?

Is using a reg a bandaid fix for maxed out injectors? How?

R33 gtr, power fc, pod filters and 14.5psi

That doesn't sound.right.. my standard ones are at 270kw.and they still have a bit to give... either get yr injecters checked out or get a better tuner buddy

[bigmikespec]

I want to fit cam gears, but my tuner tells me that my gtr has almost maxed out the standard injectors, how? she only has a humble 208awkw?

If that's the case, will a fuel reg fix it? Which one, does it have to be adjustable?

Is using a reg a bandaid fix for maxed out injectors? How?

R33 gtr, power fc, pod filters and 14.5psi

Check your base fuel pressure first to see if it is where it should be; I am not 100% what it is from standard so don't want to give you a bum steer. There should be much more duty left at that power.

[Brandon]

Doesnt sound right to me too. I'm running 16psi and pushing 250awkw with less than 90% duty cycle.

[R31Nismoid]

stock injectors @ factory rail will do around 280rwkw quite safely.

Sounds like your fuel pump needs replacing, and no - a reg will not fix it.

Only make it worse

[TiTAN]

dying fuel pump probably.

the stock reg is good for well over 300kw. get injectors that are sized for what you want rather than running silly rail pressures.

[snozzle]

well it adds up if your saying your injectors are near maxing out running on 14.5psi but you should be making far more than 208awkw at that boost

im running that exact same boost on -7 turbos (stock size), car is making 260-270awkw and my stock injectors are at 90% tops

his dyno must be just reading really low, f**k.. 60-70kw lower? thats redicilous

[STATUS]

check the fuel pump control it may only be running half speed, had a few do this. (fuel pressure gauge and volt meter)

[Blitz]

well it adds up if your saying your injectors are near maxing out running on 14.5psi but you should be making far more than 208awkw at that boost

Its actually not far off the mark for a car without cam gears dialed in, and of course dependant on other mods. Remember every car/engine is different and the stock engines are getting on a bit now.

his dyno must be just reading really low, f**k.. 60-70kw lower? thats redicilous

How about comparing apples with apples here so as not to confuse the thread starter? Hard to compare a car with bigger turbos and ~270awkw to one with standard turbos and no cam gears. As you stated, there are plenty of dynos that read lower than others.

Back to the original query though, I would be checking your fuel pressure and most likely replacing your fuel pump as others have suggested.

[Sheriff Wan]

As mentioned you need to check the flow from the fuel pump - sounds way out - could be a bad connection somewhere? Try the direct earthing trick.

My RB25 injectors are making 230...

[MrStabby]

Agree most likely to be fuel pump dying, but don't forget to change the filter and check the vacuum/boost signal to the regulator.

Remember when checking the voltage at the fuel pump that the control module does not supply the full 14v at idle. IIRC its about 9v. I dont know when it switches to full power tho.

[GD51LA]

He said standard gtr injectors max out on his dyno at 220awkw

I will say his dyno is prety shy, my car on another dyno (IS motoring) was reading 27 kw more

So that would take my car to 230awkw or so. Maybe the injectors would max at that hp?

Duty cycle reached 88%

[R31Nismoid]

Everyone dyno is "shy" mate, it's the new black.

Either way, at that power level 88% duty means there is something wrong.

Although - you said they were maxed, yet now its 88%, that is not maxed.

[Don Dada]

Dont sweat it mate....if your afrs are down to 10s then that's perfectly normal

[GD51LA]

Everyone dyno is "shy" mate, it's the new black.

Either way, at that power level 88% duty means there is something wrong.

Although - you said they were maxed, yet now its 88%, that is not maxed.

88% is safetly maxed

Anyway, I got my money back from the tuner today

It's booked in at crd tommorow..

We'll see what they say

[Rolls]

Dont sweat it mate....if your afrs are down to 10s then that's perfectly normal

this

what afrs are you running? Possible to get a dyno sheet with afrs etc?

Edited November 4, 2010 by Rolls

[NSNPWR]

Anyway, I got my money back from the tuner today

Unheard of! Congrats...

[Rolls]

Unheard of! Congrats...

wow that really is, at least they could admit their mistake and attempt to save face

[Harey]

Did they actually spend time tuning or just stop after one run when they saw the injector duty cycle??

[N1racer]

go to Unigroup @ girraween. he knows wot he is doing