Jump to content
SAU Community

Recommended Posts

My mate gave me a Apexi Power FC + commander for my R33 GTR and I'm contemplating whether I should put it in my car.

The only mods I've done is a Apexi N1 Evolution catback exhaust, K&N hi flow panel filter and the boost is set at 1 bar.

I don't really have that much money to modify it further and I'm pretty happy with it as it is.

Would the PFC + tune be worthwhile in my near standard car and what kind of power gains would I be looking at?

Should I at least upgrade my fuel pump and injectors?

I've been looking at these injectors:

RC Fuel Injectors Nissan Skyline RB24 RB26 660cc 660 cc: eBay Motors (item 280396155407 end time Sep-06-10 09:58:11 PDT)

You probably have about 200kw at the wheels now. A powerfc + tune will get you maybe 230kw. Stock injectors are good for 280kw so don't change them. If the turbos are stockers they wont last at 1 bar forever, and when they do let go they can trash the motor if you're unlucky....

My mate gave me a Apexi Power FC + commander for my R33 GTR and I'm contemplating whether I should put it in my car.

The only mods I've done is a Apexi N1 Evolution catback exhaust, K&N hi flow panel filter and the boost is set at 1 bar.

I don't really have that much money to modify it further and I'm pretty happy with it as it is.

Would the PFC + tune be worthwhile in my near standard car and what kind of power gains would I be looking at?

Should I at least upgrade my fuel pump and injectors?

I've been looking at these injectors:

RC Fuel Injectors Nissan Skyline RB24 RB26 660cc 660 cc: eBay Motors (item 280396155407 end time Sep-06-10 09:58:11 PDT)

Spend the money on Front and Down pipes and a Hi Flow Cat so you get a full turbo back exhaust system.

That will open up the power a lot more.

You can still run a Power FC on a lightly modified car, as it will refine your Air / Fuel system to run at an optimum level.

Having said that, your car is stock besides a panel filter / cat back exhaust, 1 Bar boost and if your not willing to take on higher power levels, you won't really need the Power FC.

I would not bother with the 660cc injectors unless you are chasing big power figures.

Until you want a large amount of kW's, Power FC's / Injectors / Fuel Pump / Fuel Rail / Fuel Regulator / Z32 or Nismo AMF's / Boost Controller / Dyno Tune will have to come into play.

(1 thing after another)

Stock GTR parts like the Air Box + Filter / AFM's / Front Mount Intercooler / BOV / Fueling System are all good for 300 - 350 kW's.

Yeah AFMs like injectors are good for 280-300kw so changing them now is a waste of money. Save up for turbos and do them before anything, you're on borrowed time. My stock turbs let go at 13.5 psi, probably 120,000kms old. If you have to do ECU now, price up Nistune as an alternative to powerfc.

I'm in the same situation really.

Got the PFC in a box but the car is stock.

Found the car is still fitted with the boost restrictor.

Will removing the restrictor raise the boost to 1 bar?

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

    • As discussed in the previous post, the bushes in the 110 needed replacing. I took this opportunity to replace the castor bushes, the front lower control arm, lower the car and get the alignment dialled in with new tyres. I took it down to Alignment Motorsports on the GC to get this work done and also get more out of the Shockworks as I felt like I wasn't getting the full use out of them.  To cut a very long story short, it ended up being the case the passenger side castor arm wouldn't accept the brand new bush as the sleeve had worn badly enough to the point you could push the new bush in by hand and completely through. Trying a pair of TRD bushes didn't fix the issue either (I had originally gone with Hardrace bushes). We needed to urgently source another castor arm, and thankfully this was sourced and the guys at the shop worked on my car until 7pm on a Saturday to get everything done. The car rides a lot nicer now with the suspension dialled in properly. Lowered the car a little as well to suit the lower profile front tyres, and just bring the car down generally. Eternally thankful for the guys down at the shop to get the car sorted, we both pulled big favours from our contacts to get it done on the Saturday.  Also plugged in the new Stedi foglights into the S15, and even from a quick test in the garage I'm keen to see how they look out on the road. I had some concerns about the length of the LED body and whether it'd fit in the foglight housing but it's fine.  I've got a small window coming up next month where I'll likely get a little paint work done on the 110 to remove the rear wing, add a boot wing and roof wing, get the side skirt fixed up and colour match the little panel on the tail lights so that I can install some badges that I've kept in storage. I'm also tempted to put in a new pair of headlights on the 110.  Until then, here's some more pictures from Easter this year. 
    • I would put a fuel pressure gauge between the filter and the fuel rail, see if it's maintaining good fuel pressure at idle going up to the point when it stalls. Do you see any strange behavior in commanded fuel leading up to the point when it stalls? You might have to start going through the service manual and doing a long list of sensor tests if it's not the fuel system for whatever reason.
    • Hi,  Just joined the forum so I could share my "fix" of this problem. Might be of use to someone. Had the same hunting at idle issue on my V36 with VQ35HR engine after swapping the engine because the original one got overheated.  While changing the engine I made the mistake of cleaning the throttle bodies and tried all the tricks i could find to do a throttle relearn with no luck. Gave in and took it to a shop and they couldn't sort it. Then took it to my local Nissan dealership and they couldn't get it to idle properly. They said I'd need to replace the throttle bodies and the ecu probably costing more than the car is worth. So I had the idea of replacing the carbon I cleaned out with a thin layer of super glue and it's back to normal idle now. Bit rough but saved the car from the wreckers 🤣
    • After my last update, I went ahead with cleaning and restoring the entire fuel system. This included removing the tank and cleaning it with the Beyond Balistics solution, power washing it multiple times, drying it thoroughly, rinsing with IPA, drying again with heat gun and compressed air. Also, cleaning out the lines, fuel rail, and replacing the fuel pump with an OEM-style one. During the cleaning process, I replaced several hoses - including the breather hose on the fuel tank, which turned out to be the cause of the earlier fuel leak. This is what the old fuel filter looked like: Fuel tank before cleaning: Dirty Fuel Tank.mp4   Fuel tank after cleaning (some staining remains): Clean Fuel Tank.mp4 Both the OEM 270cc and new DeatschWerks 550cc injectors were cleaned professionally by a shop. Before reassembling everything, I tested the fuel flow by running the pump output into a container at the fuel filter location - flow looked good. I then fitted the new fuel filter and reassembled the rest of the system. Fuel Flow Test.mp4 Test 1 - 550cc injectors Ran the new fuel pump with its supplied diagonal strainer (different from OEM’s flat strainer) and my 550cc injectors using the same resized-injector map I had successfully used before. At first, it idled roughly and stalled when I applied throttle. Checked the spark plugs and found that they were fouled with carbon (likely from the earlier overly rich running when the injectors were clogged). After cleaning the plugs, the car started fine. However, it would only idle for 30–60 seconds before stalling, and while driving it would feel like a “fuel cut” after a few seconds - though it wouldn’t fully stall. Test 2 – Strainer swap Suspecting the diagonal strainer might not be reaching the tank bottom, I swapped it for the original flat strainer and filled the tank with ~45L of fuel. The issue persisted exactly the same. Test 3 – OEM injectors To eliminate tuning variables, I reinstalled the OEM 270cc injectors and reverted to the original map. Cleaned the spark plugs again just in-case. The stalling and “fuel cut” still remained.   At this stage, I suspect an intermittent power or connection fault at the fuel pump hanger, caused during the cleaning process. This has led me to look into getting Frenchy’s fuel hanger and replacing the unit entirely. TL;DR: Cleaned and restored the fuel system (tank, lines, rail, pump). Tested 550cc injectors with the same resized-injector map as before, but the car stalls at idle and experiences what feels like “fuel cut” after a few seconds of driving. Swapped back to OEM injectors with original map to rule out tuning, but the issue persists. Now suspecting an intermittent power or connection fault at the fuel pump hanger, possibly cause by the cleaning process.  
×
×
  • Create New...