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Few questions regarding my new turbo setup

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  • #1

    Few questions regarding my new turbo setup

    recently picked up the following:
    rb25 neo turbo
    gtr injectors
    socketed/tuned stock ecu
    have 3" exhaust, and cone filter intake
    front mount intercooler

    just trying to sort a few things out. It's tuned for 16-18 psi.

    1. From what i've searched i'll want plugs gapped at .8mm, but i'm unclear as to what heat range to run. sounds like 6, but maybe 7. input would be nice. also what type of plug is good?

    2. Will i need to upgrade my BOV? and what would be the benefit of upgrading from the stock bov if the stock one doesn't leak at 18 psi?
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  • #2
    no you do not need to "upgrade" grade your bov. the only reason to upgrade bovs is for sound. the recirculating system is more beneficial to the performance of your motor than atmospheric. so basically the only benefit of a aftermarket bov is making girls wet. as far as plugs i have always ran ngk iridium
    1991 Nissan Skyline R32 GT-R: 710whp 521 ft/lbs 27.5psi 11.8 @126mph low boost

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    • #3
      Your best bet is to avoid iridium - often misfire at that spec and are subject to breaking on det/knock if map is a bit strange.

      Best bet is - BCPR7E or BKR7E .. Gapped to .8 is good, or less. I normally gap to .7 but its to the individual. As for heat range, i ran 7's at 15 psi and they were very nice. OEM is 5 .. 6 is good, but 7 seems to be the sweet spot for a modified rb.
      Check out the GTST Projects page and keep up to date with my build!
      www.nelsonmx.wordpress.com
      Like us on Facebook! www.facebook.com/NelsonMX
      Any part inquiries can be forwarded to marc@nelsonmx.com

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      • #4
        And, keep your BOV, or delete it (block it off). A/M bov is not a necessary modification as stated above. If you want it to sound good, go for it, but dumping all this extra pressure to atmosphere is just hindering performance.
        Check out the GTST Projects page and keep up to date with my build!
        www.nelsonmx.wordpress.com
        Like us on Facebook! www.facebook.com/NelsonMX
        Any part inquiries can be forwarded to marc@nelsonmx.com

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        • #5
          Make sure to upgrade your fuel pump over the stocker to compensate for the higher CFM / injector load. I found the Holly 255 LPH Supra pump was a direct drop in / affordable price.

          You will also need the GTR resistor pack to support the GTR injectors like pictured below:

          A 12V wire (red) feeds the pack and gets split to each injector. This will run the low impedance required for the GTR injectors.
          sigpic
          89 Nissan Skyline GTS-t sports limited sedan
          4 door love.

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          • #6
            thanks for all the feedback a second opinion would be nice on the plugs anyone? and mfroese, yea i already wired in the resistor box. i figured that waws just kinda a given. and i have a walbro 255 lph fuel pump

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            • #7
              Originally posted by ghrycan View Post
              thanks for all the feedback a second opinion would be nice on the plugs anyone? and mfroese, yea i already wired in the resistor box. i figured that waws just kinda a given. and i have a walbro 255 lph fuel pump
              First guy was right, iridiums are a waste of money. A good set of coppers will be wallet friendly and perform better. Copper is a better conductor of electricity!

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              • #8
                BKR7E all the way. I have iridiums right now and I do not notice ANY difference (other than my wallet flinching)

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