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  1. #1
    Meddy Guest

    Standard Injector Size

    Ok folks another question which I would like putting to rest before I fit my new 740 injectors is exactly what size are the stock injectors when running at standard S15 fuel pressure?

    This thread on SXOC didnt really give a definitive answer. http://www.sxoc.com/vbb/showthread.php?t=176299

    I need to know so that I can input the correct correction factor into my PFC. The difference between 448 and 480 is going to be about 5% which seems a bit much to me. I suppose if I go for the smaller of the two it'll only run rich rather than lean.

    I could just get it mapped again but that seems a bit of a waste at the moment.

  2. #2
    Derek Guest
    I'm almost 90% sure its 480cc.

  3. #3
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    There is no documented answer to that, I'm afraid. I spent a while trying to find out. All I got was 'they're 480', 'pretty sure they're 480s'. But nothing concrete from Nissan or anywhere else. That query was based entirely on the entry in the A'PEXi manual. Its been shown before that mistakes are made in these manuals (S15 pinouts for the Emanage Ultimate for example).

    AFAIK everyone is basing their PFC and Emanage on 480 injectors. Once you've got a remap done, its going to be irrelevant anyway...

    When I fit my 740s, i'm going to send my 480s off to be cleaned and flow tested. There will be a definite answer then.

  4. #4
    Meddy Guest
    Quote Originally Posted by Nicely
    There is no documented answer to that, I'm afraid. I spent a while trying to find out. All I got was 'they're 480', 'pretty sure they're 480s'. But nothing concrete from Nissan or anywhere else. That query was based entirely on the entry in the A'PEXi manual. Its been shown before that mistakes are made in these manuals (S15 pinouts for the Emanage Ultimate for example).

    AFAIK everyone is basing their PFC and Emanage on 480 injectors. Once you've got a remap done, its going to be irrelevant anyway...

    When I fit my 740s, i'm going to send my 480s off to be cleaned and flow tested. There will be a definite answer then.
    I thought as much but just thought it was worth airing the query to see if an answer crept out of the woodwork.

    I was just trying to avoid having to remap, as to be honest I cant afford the expense at the minute and just wanted to get them fitted before I move house and lose my lovely double garage.

    Any ideas how much it'll cost to get things tweaked for 1.1bar? I suppose it'll be another 4 hours or so labour to get a decent job done.

  5. #5
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    It's a shame you're so far from Newbury. Jez would map it for you for under ?150. And that would be a true on-the-road mapping.

    Have to say, I'm seriously considering ditching the Emanage and getting him to do a chip. But he's only 25 miles from me. The only thing stopping me is that its a waste me getting the Innovate to do my own mapping and not use it...

  6. #6
    Meddy Guest
    Quote Originally Posted by Nicely
    It's a shame you're so far from Newbury. Jez would map it for you for under ?150. And that would be a true on-the-road mapping.

    Have to say, I'm seriously considering ditching the Emanage and getting him to do a chip. But he's only 25 miles from me. The only thing stopping me is that its a waste me getting the Innovate to do my own mapping and not use it...
    I didnt think Jez was familiar with the PFC. At ?150 it would be worth the drive. Ah just checked, its 190 miles each way so ?70 on fuel, still not too bad.

    I paid ?380 for a full on the road mapping session when I first had the car done, which seemed to be about the going rate. If Jez is that cheap, it might be time for a road trip.

  7. #7
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    http://forum.s15oc.com/viewtopic.php?t=414

    Its got to be a dry day though. Its actually done on the road, and would get a bit dangerous if it was wet. Its finne normally though.

  8. #8
    Meddy Guest
    Quote Originally Posted by Nicely
    http://forum.s15oc.com/viewtopic.php?t=414

    Its got to be a dry day though. Its actually done on the road, and would get a bit dangerous if it was wet. Its finne normally though.
    Had a look at his prices and PFC mapping starts at ?250 so plus petrol is going to be no cheaper. Ah well never mind.

  9. #9
    S15R Guest
    one question with the 740cc u got there, is it 4 pintle like the nismo 555cc?

  10. #10
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    Quote Originally Posted by Meddy
    Quote Originally Posted by Nicely
    http://forum.s15oc.com/viewtopic.php?t=414

    Its got to be a dry day though. Its actually done on the road, and would get a bit dangerous if it was wet. Its finne normally though.
    Had a look at his prices and PFC mapping starts at ?250 so plus petrol is going to be no cheaper. Ah well never mind.
    He charges me ?40 per hour for Emanage mapping. Speak to him and see what he says. Mention you're on here and an SXOC member.

    Just thought about what I said with getting a chip. I can do both. I can get a totally mapped chip and run a blank map via the Emanage, but tweak it should I change anything.

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