I have been shopping for some new injectors for my 2000 Supercharged maxima. Since have the same injectors you guys do i figured i would as you all for some help since not to many maximas with my year model are running upgraded injectors What do all of you think of RC engineering injectors? Are they decent quality or are the Power Enterprise injectors better. I think i heard that RC's have poor atomization(I think that's how you say it) which can cause a rough idle (IRCC). Any help would be appreciated.

Thanks
Chris

 

dumb question..what does IRCC mean..I have seen before but have no idea.


The RC's are the low cost approach. The PE's are far better quality, but roughly twice the price. They are also plug and play, whereas the RC's require a harness to plug into the stock harness. Many of us are using the 440cc injectors with eManage without any trouble. Idle tends to be a little bit rougher...according to some people's observations.

You will need something to scale those larger injectors...what do you plan on using?

 

sorry i think it is IIRC=If i recall correctly, thats what i get for trying to be fancy

Im using Vortech fmu w 8:1 fmu and t-rex auxillary pump and i am going ti add the walbro in tank pump and a fuel pressure regulator. I have SAFC2 right now but i have been told i need to switch to emanage with the support disc to allow me to make fuel adjustments while the ecu is in closed loop operation.

 

As Sharif said, and as I wrote in my PM response, the PE enjectors are multiple orifice (12 for the 380cc and 8 for the 510cc...these numbers are taken from a poor translation of their literature... they ARE multiple orifice for certain, however, just not certain as to the exact jet number). These orifices also have the correct delta angle just like the stock injectors do as well as the Bosch injectors used in the APS kit that spray two separate streams onto the back of the intake valves equally and not onto the intake runner walls.

I have been running the 380cc's for the last 4-5K miles, and paid a premium for the quality and got the 510cc injectors for my engine build upgade. These injectors ARE in fact rated at 3bar contrary to many rumors of a few months ago that they are not. I could have gone for 550, 650, or 720cc RC for about 60% of the cost.

 

the fact that they are run at 3 bar clears alot of stuff up for me. So now i am thinking i can go with 380cc and keep the safc for the time being. Do you think the 380cc will be enough to allow room for upgrading from the 10psi pulley i am running?

 

They are rated at 3 bar and you can run them safely at 4 bar differential pressure (meaning at a fuel rail pressure equaling 4bar + boost pressure).

As far as whether these are enough for your planned boost levels, you will need to look at the actual HP level that you are expecting to get. Given that yoou have a 3.0 engine, you will make less hp per boost than we are with our 3.5L engines. I really don't know yoour engine very well to make a specific recommendation.

 

When you say plus boost pressure are you saying +the added fuel pressure from the auxilary fuel pump. I may switch to a cold air setup on the intake piping which would up the boost by 1 psi and i think my current setup is putting me around 300whp.

Thanks for the help
Chris

 

Can you elaborate on how you know this is true?

Thanks.

 

....and...then........

 

Ice.... I am 99.5% certain that this is the case. My querying several people and sources within PE Japan and Denso, as well as talking to some WRX people that use this very injector (with a different collar... the 380cc one). All of the sources suggest that they are in fact rated 380cc or 510 cc (respectively) at 3bar. Also, RC Engineering (John) knows of no evidence that these are not rated at the standard 3bar.

 

Chris...

Differenial pressure=fuel rail pressure-manifold pressure over 1 bar (i.e. boost pressure).

So, by installing a CAI and raising your manifold pressure by 1psi (i am not sure this is really possible, but nontheless) you are just getting closer to the 0 relative pressure in the manifold, or 1 atm (about 1.033 bar) absolute pressure. For an NA car, do not worry about the concept of differential pressure, as your boost pressure roughly equals 0 psi under WOT (wide open throttle). So, for you, we are talking about fuel rail pressure, period. You can safely go to 4 bar, at least according to APS' engineers and many other credible technical sources.

Gurgen

 

I nominate Gurgen to be the resident injector specialist....

 

Haha... I don't think so... I just know this injector and not much else.

 

Thanks gurgen......I hope you're right.

 

Wow that was way over my head but i think i get the point. Basically this will be sufficient enough. And grugen many maximas do gain the extra pound of boost by swithcing to a cold air setup. Our in take pipe on the vorech supercharger routes all the way from the passenger side to down by the transmission where the filter sits. The pipe has to travel accross the engine and lays directly over the high pressure pipe. That gives of a hell of alot heat to the incoming air that is already traveling a good distance.
And who says $tealin doesn't have a good product design team

 

Sorry... Had a brain fart.. thought you were N/A (naturally aspirated). Ok, so for you, you can have fuel rail pressure of boost+4 bar, whatever that comes to be. Just think about what kind of injectors you are running now and how they compare to the 380cc's that you want to get, in tgerms of percentages and in terms of upping the fuel pressure .

 

We have the same injectors as you guys, ie 290cc, but we run at 3bar instead of 3.5bar. However, we have a return style system, which is nice.