Jump to content
SAU Community

Recommended Posts

Mine has made 200rwkw (197,200,200 on three seperate dyno's) on standard injectors. I must admit though, the tune was quite lean. It has got a Bosch 040 in tank pump, and no form of fuel pressure adjustment apart from what the pump delivers. Dunno how, as your calculations seem to point to them being un-able to make that sort of power?

P.S -thats my qoute about the 18psi :D

Chris

@ 100% duty i.e. not giving the injectors enough time to open and close and given you only have less than 40kw loss...yes this is possible!

But highly not recommended 90% is still OK...but tuners will do it at 60-70% duty, over here anyway.

My bet is that isn't far from the truth, its the most feasable and lateral answer to the question :D If that was the case, there is bound to be a few more around

Most people's injectors are covered with a bit of filth and are hard see without removing them, I will keep a eye out for other RB20 injectors and see if I can find another!

If they were CA or GTR injectors, there would be a ballast resistor attached to the loom somewhere, so I stand by what I reckon - ran out of red colouring! :)

Chris

@ 100% duty i.e. not giving the injectors enough time to open and close and give you only have less than 40kw loss...yes this is possible!  

But highly not recommended 90% is still OK...but tuners will do it at 60-70% duty, over here anyway.

I am pretty sure they where near on 100%, as soon as the fuel filter became the slightest bit of dirty, it would suffer light detonation - new fuel filter and some injector cleaner in the tank and all would be good

The car would backfire and flame alot when I came of the throttle, suggesting to me the injectors where working 100% of the time and there would be a little bit of fuel still entering the cylinders after I had lifted of the throttle

hopefully the new injectors will need no more than 60% to make 200odd rwkw

Chris

What injectors did you go Chris?

 

Let me know how the fuel consumption goes with them. :D

I went 440cc GTR in the end, and wired in the resistor pack etc, I figured it would be plenty for my RB20

So far with the PFC closed loop function, fuel economy is around 10 litres per 100km, about a litre per 100 better than with the re-programmed ECU :D The PFC closed loop function is first class, providing it is setup right

In the injector correction section (cant remember exactly) there is a correction and lag setup, if you work out the percentage differance from stock and enter this value in - for me it was 58.5% and the injector lag time, in my case -.12ms, it runs better than ever before and delivers quite good economy

The injector lag/cc table for standard nissan stuff can be found here - http://www.ap-engineering.co.jp/el/inj_top.htm

Its being tuned shortly for more boost etc, but hopefully the economy will remain similar providing I dont use the loud pedal too often :)

  • 5 weeks later...
The most common upgrade for RB20's are the 444 cc GTR injectors, with the GTR resistor pack to match the impedance, they are a good choice at realtively low cost as there are many around.

:P

In practice, what is the maximum power achieved with 444cc GTR injectors? I am searching through the forums right now, but may as well ask at the same time.

Reason being, I am going shopping for some parts on the weekend and there doesnt seem to be much price difference between R34 GTR injectors or aftermarket 550cc injectors here in Japan, so I could go either way. I do not want excessively large injectors though and my realistic power goal is 250rwkw from my RB30DET.

Opinions on this choice with fuel economy and idle in mind?

EDIT: Found it ~270rwkw. Opinions still welcome.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Just trying to get my head around this. At 5psi of boost, you turn on your wmi pump, and then you're using a 3000cc injector, to allow flow upto the actual engine, where you have your 6x200cc injectors and a 500cc injector. If the above is correct, what advantage are you obtaining by having the 3000cc injector blocking flow, is this just incase a line breaks between that injector and the motor you can stop flow immediately? Or are the 6x200cc and 500cc less injectors and just spray nozzle?
    • Welcome! New member myself, but I had an R33 back in 2002. Best advice I could give, based on my experience: if you're running the factory turbo, be very conservative with boost. I made the mistake of just fiddling around with the boost controller and cranking the boost for fun, and the end result was my intake pipes popping off frequently from the constant deluge of oil that was being blown into the recirc by the stressed-out turbo, which itself was siphoning oil from the engine and farting it out both sides of its centre bearing (or something to that effect). If I could do it all again, I would have gotten a new turbo and had a tune dialled in professionally and then just left it alone! Funny you mention the metal shavings in the gearbox, as I had the same thing - the probe plug (magnetic drain plug, essentially) would come out caked with shavings. At least it was doing its job. Not sure if that's just sacrificial wear and part of the deal, or if my gearbox was shagged, but I wasn't abusing it. Enjoy the R33 - they're a dying breed, and if they weren't $35k+ on CarSales in Queensland, I might have picked up one of those again, instead of the 370GT I own now (though I'm loving the 370GT, that big 3.7L V6 just hits different).
    • Howdy folks. I owned an R33 back in 2002, which was thoroughly beyond my capacity (financially speaking) to maintain/insure, so we parted ways in 2004. Fast forward 21 years (to literally yesterday, in fact) and I'm now the proud owner of a 2007 V36 370GT. I'm happily surprised by how much power the VQ37VHR makes, compared to the RB25DET, considering the latter is turbocharged. I had planned to add a turbo at some point but I'm on the fence about whether I'll even need it (though I do love the sudden onset of extra torque). Any other 370GT owners around the traps, I'd love to hear about your experiences with this car (good and bad).
    • Perhaps the answer is... more jacks!* *proper jacks must be used.  
    • I NEVER think about using a scissor jack unless there is absolutely no other alternative. f**king things are dangerous, annoying and stupid.
×
×
  • Create New...