Blue 300ZX track car project

Discussion in 'Member's Garage' started by UNIQUE ZED, Jun 12, 2014.

  1. UNIQUE ZED

    UNIQUE ZED Zed Racing World

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    Built in 2005 with solid lifters, Argo rods, 4 x exhaust custom cams, oversized idler and tensioner bearings, lower valley studs instead of bolts, custom top feed fuel rails, custom extrude honed turbo's with ceramic bearings balanced to 110,000 rpm, extrude honed manifolds, custom under driven harmonic balancer, alloy and titanium bolts used, billet alloy alternator bracket, custom sump baffling, over sized valves, UAS valve springs, ported heads and more.

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    Deleting anything unnecessary in the engine bay, including the air con, 4 wheel steer and more.

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    Relocating fuse box involves cutting, lengthening and soldering 45 wires x 2.
     
    Last edited: Jun 12, 2014
  2. Shane001

    Shane001 Well-Known Member

    What, one is not enough lol :br:
     
  3. bRACKET

    bRACKET Do Right Dean

    Why 4 exhaust cams?
     
  4. rob260

    rob260 Administrator Staff Member

    They're hollow -lighter. Also no problems with VTC etc (gotta remember this was nearly 10 years ago do no BDE gears).
     
  5. BLACK BEAST

    BLACK BEAST SLICKTOP TT R-SPEC

    Exhaust cams are solid ?
    Intake cams are hollow for VVT?

    Exhaust cam gears used are very light .
     
  6. rob260

    rob260 Administrator Staff Member

    You're right -in any case they're used in this application because they're lighter
     
  7. WazTTed

    WazTTed Grease Monkey

    interesting idler setup are you running a solid tensioner aswell?
     
  8. UNIQUE ZED

    UNIQUE ZED Zed Racing World

    Yes the solid tensioner is to prevent belt flap by deleting the hydraulic tensioner, and uses an offset camber style adjuster the same as a GTR,which can be an issue with strong valve springs. It also allows room for oversized pulleys, which increases wrap on the crank sprocket, picking up another three teeth on the cam belt. Similar to a GTR and reduces the chance of jumping teeth when racing with big hp high and fast revving motor, including down shifting or missing gears and sudden jumps in revs.

    The main reason for using exhaust cam gears is to replace the heavy troublesome inlet hydraulic adjustable cam gears, which fail over time, as the internal spring weakens. They also often don't cope with strong valve springs and they chatter. As mentioned this motor was built in 2005 before the stronger BDE gears were available as an option. Plus the inlet cams have a weak point at the front part and can snap when racing, again with the added load of strong valve springs and big hp fast and high revving engine. With the added stress of racing with much hotter temps and vibration compared to a road car.

    We also shaved of quite a bit of weight off the inside of the exhaust cam gears.
     
  9. Z32 TT

    Z32 TT Active Member

    so the 4 exhaust cams. are you able to just drop them in and run them? I havent looked closeley but will later tonight. I like the idea.
     
  10. Shane001

    Shane001 Well-Known Member

    I think that was meant to read 'exhaust cam gears'.

    I don't think you could replace the intake cams with exhaust cams?
     
  11. Z32 TT

    Z32 TT Active Member

    yeah I didnt think so either. looking for some clarification.
     
  12. rob260

    rob260 Administrator Staff Member

    They are exhaust cams
     
  13. Z32 TT

    Z32 TT Active Member

    arent they different lengths? Im going to play with the junk heads I have tonight haha.
     
  14. Shane001

    Shane001 Well-Known Member

    Wouldn't the specs be completely different? ie lift, duration, etc.
     
  15. SRB-2NV

    SRB-2NV #TEAMROB

    same lift and duration. Except for TT auto.
     
  16. Z32 TT

    Z32 TT Active Member

    So yep they are the same. Wonder if you could run 4 exhaust cams and stock exhaust cam wheels and not worry about VCT.... Will see
     
  17. SRB-2NV

    SRB-2NV #TEAMROB

    From what i remember UAS did that on a TT auto that made 280+rwkw on stock turbos, four exhaust cams and adjustable camgears all round.
     
  18. 92z32tt

    92z32tt New Member

    Yes you can ... just advance the inlet cams 1 tooth ( adv 7.2 degrees ) otherwise you will have crap low > mid range.
     
  19. WazTTed

    WazTTed Grease Monkey

    any pics of the solid tensioner ??? sounds like a good setup for cars running heavy valve springs
     
  20. UNIQUE ZED

    UNIQUE ZED Zed Racing World

    This motor has custom cams to suit solid lifters, with a fair amount of lift, dialled in with a degree wheel, when it was built and adjusted on dyno.
     

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