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Thread: Silvia S15 RB25 Project

  1. #41
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    hows this coming on?

  2. #42
    Guest Adzsy's Avatar
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    Very slowly but very surely.

    I have removed the inlet manifold and started swapping all the parts over. Whilst turning the fuel pressure regulator 180deg I managed to snap it!



    Heres the injectors being rotated 180deg too. I didn't damage these thankfully.


  3. #43
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    i left my injectors the same way around, might be an idea to fit my 740's that way so theres ore room though
    have you sorted a regulator out?

  4. #44
    Guest Adzsy's Avatar
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    Not sorted the regulator yet. I haven't really looked but do need one so if anyone has one let me know.

    I am going to keep the engine as standard as poss until it is up and running, at least anything that will effect the mapping/ecu.

  5. #45
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    iv got a spare at work if you dont find one anyway, id match the ports on the inlet aswell mine were a little bit out

  6. #46
    Guest Adzsy's Avatar
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    that would be great if you have it.

    Good tip on the inlet ports, i'll check mine tonight.

    cheers dude

  7. #47
    Guest Adzsy's Avatar
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    Well I will update fully when get some pics but for now I have

    Fitted the inlet manifold....mostly, just need to hook up the Q45 throttle body
    Fitted the manual pedals, just waiting on a Clutch master cylinder to arrive.
    Fitted a 5Zigen cat back, but I need to mod my down pipe to mate up to the RB elbow.
    I started thinking about the wiring. There is next to no information on the S15 Spec S Auto with regards to wiring....ECU / F4 pinouts. Any help here would be much appreciated.

  8. #48
    Guest Adzsy's Avatar
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    Bit of an update and some pics.

    Just part fitted the FMIC. I need to fab a pipe from the core to the Q45 throttle body and include the dump valve somewhere in that.






  9. #49
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    Looks great

    how much does the Rb25 weigh?

  10. #50
    Guest Adzsy's Avatar
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    TBH I'm not really sure. But removing the air con, and relocating the battery to the boot will go someway to restoring it's weight distribution........i hope!
    I have turned into a striaght line hero these days anyway so just having the 6 cylinder grunt is what I'm after.

  11. #51
    Guest James_S15's Avatar
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    Wow - this is a nugget of a build thread! Keep the updates coming dude

  12. #52
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    Love this wish I had an s15
    What happened to the sr i may be interested if you still have it

  13. #53
    Guest Adzsy's Avatar
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    Quote Originally Posted by itrhondaboy View Post
    Love this wish I had an s15
    What happened to the sr i may be interested if you still have it
    All the good bits were sold and then the rest was weighed in.

  14. #54
    Guest Adzsy's Avatar
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    Not done to much recently. I have made a down pipe. The R33 one almost fitted, so I just welded in a flexi section. This sorted it right out.

    I have nearly figured out the wiring so I will make a start on this soon.

  15. #55
    Guest Adzsy's Avatar
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    some more pics





    Water bottle rotated.



    and heres a pic of the downpipe fitted. Perfect fit!


  16. #56
    Guest Adzsy's Avatar
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    Well I have been busy making up the wiring loom. Not sure if I am doing it right or if it will work, but everything seems to have made sense so far.

    More importantly I bought these off ianlea73. Not got them yet, there at my parents house 200 miles away but can't wait to try them on,

    18x10 et 22 rear wheels and 18x9 et 38 front wheels.


  17. #57
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    DR Prop (http://drprop.co.uk) has made me up a 1 piece prop shaft using the Skyline bits and pieces.

    I'm really happy with it, and for £135 balanced and shipped you can't grumble.



    So this will be fitted tonight along with new belts.

  18. #58
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    That's a good price I'm going to make a call tomorrow. What parts did you send? I've already cut and welded my prop up for my rb swap. Just needs balancing but for the price of yours I'll go that route?

    How does your gearstick sit. Did your box mount line up to the s body holes?

  19. #59
    Guest Adzsy's Avatar
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    I just sent him the R33 complete prop and he cut the ends off to use because the Spec S Prop was about 2" diameter. I sent him this sketch; yours will be different for an S14.



    My gearstick will sit about 1.5" further forward but shout be ok.

    The holes on the gearbox mount did not line up. If you cut the section out between the two holes and make it a long slot you can mount it but this is only on two bolts not four. I want to drop mine about 5-10mm anyway so will just weld a bit of bar on with the additional holes required to mount it.

  20. #60
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    I have mine mounted using all 4 gearbox holes and I'm still using the s14 front subframe just with home made engine mounts. My gear stick sits about 1 inch further forward than stock. I've had to trim sum under bonnet bracing because of the turbo and the rb30 is taller but it's mounted as low as poss into the front I'm going to have to redesign my sump as it sits rather low.

    just noticed your only 20mins away from me

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