Jump to content
SAU Community

Recommended Posts

Ok i have a power fc, i used paulr33 excellent faq and i know how i need to correct for the larger injectors i have (1000cc) but do i need a retune one i install them or no ? i am changing NOTHING AT ALL but the injectors, no more boostr nothing, i do have a larger turbo i will be installing, but right now i just need car moving any advice ? and of course once i install the larger turbo i will be getting it tuned !

Link to comment
https://www.sau.com.au/forums/topic/305905-pfc-larger-injectors-install/
Share on other sites

Hook up a wideband O2 and just keep an eye on the A/F, I find with larger injectors from factory it just richens heaps on full load.

but if you're driving the car under 4000rpm you should be fine provided it's not stupidly lean

just imagine the injectors are physically bigger. they work off the same voltage as your old ones so all that changes is pulse timing and width. so if you have gone from say 500s to 1000s, at the exact same tune state they will literally run twice as rich.

the most common mistake i see with injectors is people thinking that they could just put a bigger set and not need to do anything else, that and adding an FPR can fix anything.

its all a learning experience, your doing well mate :P just spend some time retuning em and it will all add to your experience.

Since you will have setup the PFC to cope with the new injectors, the tune should be fine for driving between workshops (no boosting). If cold start/cold running is not ok then something is amiss (for example you didnt enter the correct latency when updating the PFC)

You may even find its ok without a retune, but you need to verify that on the dyno first.

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

    • I don't know for sure, but I'd expect them all to be interchangeable given the diff end and hub end don't move/change between any C34 series. Often Nissan will change part numbers and the aftermarket follows those year ranges; but the original part number change doesn't mean other parts won't fit. The change could be a change in material, internal parts or even just supplier. For example, all the RB gearbox to engine bolts are no longer available and there is a new part number instead. The only change is they went from cadmium plated bolts to zinc plated due to the issues manufacturing with Cadmium. They look different but work the same.
    • One year is a bit concerning. Did you try contacting GSP? It says 5 year warranty on the box if I remember correctly. I'm also running their driveshafts on my S2 Stagea.   You could check the part numbers on Amayama for your year. Here's the link for my 1998 which gives the 39100-23U60 part number. Well, that and 39100-23U70. https://www.amayama.com/en/genuine-catalogs/epc/nissan-japan/stagea/wgnc34/6649-rb25det/trans/391 What does it say for yours?
    • I ordered a GSP Front R/H Axle from here - https://justjap.com/products/gsp-premium-front-driveshaft-r-h-nissan-r32-r33-r34-skyline-gtr-stagea-4wd#description It lasted around a year before one of the boots blew out. I'm lowered, but I have GKTech roll center adjusters. One year seems a little premature. I think I'm going to spend the extra money on an OEM cv axle this time. This website - https://tfaspeed.com/collections/nissan-stagea-wgnc34-x-four-parts/products/nissan-stagea-awc34-260rs-rb26-right-front-axle-drive-assembly Makes it sound like the readily available OEM CV axle will only fit 11.1999 Stagea and up (mine is a 2.1997 S1). The JustJap listing didn't mention any years or anything for the GSP axle. Amayama shows '11.1999' and up as well for that part number. As well as 'plastic boot type'. See attached picture. So I guess my question is, does that axle (39100-23U60) really only fit S2 Stagea? It's the front driver side. If it does, I'd love to buy that instead of rolling the dice on another GSP. I've found that OEM one cheaper here: https://www.partsfornissans.com/oem-parts/nismo-jdm-r32-r33-r34-skyline-gtr-r32-gts4-right-front-axle-3910023u60 and here https://www.nissanparts.cc/oem-parts/nismo-shaft-ft-drive-3910023u60 Just a little confused because the JapSpeed listing for the GSP front driver axle doesn't mention any specific years or anything and it fit my S1 Stagea fine. So will 39100-23U60 fit my S1 Stagea even though technically it says '11.1999' and up? What would have changed? Thanks.  
    • Thanks for the info. The only "Issue" I've had with the shifter is I always found the throw between 4th and 6th gear too close. I'm always worried to shift into 4th accidently and sending my motor to the moon. Adam LZ recently came out with a video and stated Serialnine revised their shifters to correct this and will change all the revised parts for 150$. Strangely enough, I contacted Serialnine right after and they denied it and said it's bullshit. I found that strange as he's a distributer. I'll keep this forum post updated on that saga.
    • Yep that is correct. It allows you to adjust the short throw range from what I can tell
×
×
  • Create New...