NSW AUS300ZX Drag Day NSW

Discussion in 'Post Event Discussion' started by SRB-2NV, Jun 29, 2014.

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  1. badxtc

    badxtc kirby's bitch

    What's the gap size rob. I run 4thu over. And to be honest it really shouldn't smoke.
    I have also ran 5 thu over
     
    badxtc, Jul 13, 2014
    #41
  2. rob260

    rob260 Administrator Staff Member

    I dunno what they gapped it to -engine must have been put together (for the second time...) five or even six years ago and to be honest I didn't know enough at the time to ask those sorts of questions. It's nothing if not consistent, always on cold start and then goes away completely when it's at temperature. I have some ideas and theories but nothing I'd go into here, yet. Doesn't seem to affect power I had it on the dyno checking AFRs the wednesday before the drags and it's pumping a healthy 440rwkw on 98 with SFA timing, no funny businesss with correction factors either I was there and they were all zeroed out so it's an honest indication of performance.
     
    rob260, Jul 13, 2014
    #42
  3. SRB-2NV

    SRB-2NV #TEAMROB

    I'd say 113mph at 9PSI is a better indicator! :p Should get a stock shifter and go again mate, lots and lots of potential.
     
    SRB-2NV, Jul 13, 2014
    #43
  4. BLACK BEAST

    BLACK BEAST SLICKTOP TT R-SPEC

    How do you run 9psi with 14psi actuators? :confused:



    .
     
    BLACK BEAST, Jul 13, 2014
    #44
  5. Z32 TT

    Z32 TT Active Member

    It was never gonna go anywhere at 9psi? Who set it at 9
    For drags?
     
    Z32 TT, Jul 13, 2014
    #45
  6. SRB-2NV

    SRB-2NV #TEAMROB

    His boost controller resets to low boost when the car is started.
     
    SRB-2NV, Jul 13, 2014
    #46
  7. badxtc

    badxtc kirby's bitch

    BB you picked up on that to .
     
    badxtc, Jul 14, 2014
    #47
  8. badxtc

    badxtc kirby's bitch

    yeah i understand..

    you can really check this for your self to see where it is actually coming from. there is really only going to be 3 spots , it either your heads bottom end or turbo , one day maybe have a look in your intake and see if there is oil in there at all , both sides , if there is no trace well it may be a simple as your turbos arnt getting the oil out as fast as they should ,( over oiling them to begin with ) i know some people used to drill out the fitting to get more oil in the turbo back in the day ,( DONT DO THAT NOT A GOOD THING if using roller).
    small eg ..some people put so much glue on the return side of the turbo to seal it up that it almost blocks of the return to the sump. oil will sit there over night and will go into your intake and blow smoke in the morning
    the last part would be your bottom end the block may be warped and they didnt pick up on it while machining PTB will not really leak that amount of oil , depending on the cast/forging you can run 5thu 6 thu PTB with no problems

    the smoke is all ways there, its a small amount as the car gets hot it burns it away and you cant see it .
    it could be nothing , just saying
    p.s there is more to it then what ive said
     
    badxtc, Jul 14, 2014
    #48
  9. rob260

    rob260 Administrator Staff Member

    Who's running 14psi actuators?
     
    rob260, Jul 14, 2014
    #49
  10. rob260

    rob260 Administrator Staff Member

    Yeah have looked into it a fair bit -will get to the bottom of it at one stage or another just hard to justify pulling things apart when I'm low on time and it's running well. Had planned to get stuck into it over Easter but you know how it goes... maybe christmas
     
    rob260, Jul 14, 2014
    #50
  11. BLACK BEAST

    BLACK BEAST SLICKTOP TT R-SPEC



    then how are you boosting to 24psi with stock actuator pressure?

    our garret kits come with 14psi actuators .(if/with back pressure you usually get a low boost of 12psi)
    gives you a max boost of about 26psi .

    I asked for 17psi actuators in my kit .

    just to add to badxtc.
    My previous motor was wrongly given 5thou clearance (asked for 3 thou )and not a puff off smoke .
    it may give you a rattle when cold though .


    .
     
    BLACK BEAST, Jul 14, 2014
    #51
  12. rob260

    rob260 Administrator Staff Member

    I'm running standard actuators -I don't want to run big boost/power all the time. The fittings etc are from one of the early Z1 kits, I must have bought it 8 years ago maybe more. John had GCG copy the brackets and oil drain spacers etc for their kits.

    Free flowing intake and exhaust, heads that breath well, it still moves plenty of air at low boost -sound familiar? :cool:
     
    rob260, Jul 14, 2014
    #52
  13. BLACK BEAST

    BLACK BEAST SLICKTOP TT R-SPEC

    power is irrelevant in this .

    your lowest boost is controlled by the actuators.. meaning you cant turn the boost any lower with your boost controller .
    (my low boost is 17-18)

    stock actuators cant pump to 24psi ???
    They will fall over at round 18-20 (springs aren't strong enough to hold)

    not having a go just doesn't make sense you can run such a big spread on boost .. 9 to 24psi and have more ?:confused:

    sorry accidentally edited your post instead of replying -will try again
     
    Last edited by a moderator: Jul 14, 2014
    BLACK BEAST, Jul 14, 2014
    #53
  14. rob260

    rob260 Administrator Staff Member

    All good and yes I do know how turbos and wastegates and spring pressures work. I can't really comment on how much above spring pressure the eboost II can run -that would be a good question for Ben or Turbosmart. I have also been lead to believe that the bigger exhaust housings help with consistency at high boost -it's all part of a system etc and the boost controller is really just a valve...

    We're starting to get a little off-topic though...
     
    rob260, Jul 14, 2014
    #54
  15. BLACK BEAST

    BLACK BEAST SLICKTOP TT R-SPEC

    I know but the EBOOST II can only work/adjust with the spring pressure range it has been given to play with .

    stock actuators cant go that high.
    Ben would agree.
    Reason I went to 17psi is that I wanted to push to a strong 28psi and not fall over at 26psi.
     
    BLACK BEAST, Jul 14, 2014
    #55
  16. rob260

    rob260 Administrator Staff Member


    Correct on both counts.

    I'm not going to presume to know what stock actuators can or can't do, I haven't tuned enough Zeds to give a really accurate comment.

    I do think it's a little strange that you're taking the thread so far off topic to argue with me about what parts you think are fitted to my car, and what boost seetings it runs? If you had built it or tuned it or even seen it that would be a different story... Likewise not having a go, just scratching my head?
     
    rob260, Jul 14, 2014
    #56
  17. BLACK BEAST

    BLACK BEAST SLICKTOP TT R-SPEC

    Reason I brought it up is I didn't want to run 17psi actuators and went through all the experts to avoid this but couldnt.

    if there is way to run a big spread like that I want to know :)

    that's all. I don't like making mistakes .

    Everything on here is a learning experience
     
    BLACK BEAST, Jul 14, 2014
    #57
  18. badxtc

    badxtc kirby's bitch

    just for the record
    i back BLACK BEAST 100% in everything he says in these posts. just something to look into i guess

    the stock actuators will not see a good 20+ no way , been there done that , they fall of , real fast ,, i modded a set of s15 actuators , and they work very good , i still have them at home TBH.
    the .86? is good for high hp AT THAT LEVEL, i dont think they lied to you on purpose , just misunderstood. i dont believe you have the air volume to need/run .86 rear , thats all ( i dont know tho ) the pistons you were selling would have help you with the .86 rear ,

    just saying my opinion.
     
    badxtc, Jul 14, 2014
    #58
  19. rob260

    rob260 Administrator Staff Member

    Making too many assumptions there Alex -nobody lied and no misunderstandings. The .86 were chosen for top end, which they will do better than the .64. Cams and valves and porting etc also geared towards helping the engine breathe at the top. The car was built to make well over 400rwkw on 98, which is what it does and well. If building for faster response then yes could have gone smaller housings etc to boost a little sooner but at the expense of top end. There is another member with the same same cams, big valves, and same turbos in .64 rear housing and it makes about 5% less power at the top. He hits max boost (also 23psi) about 300rpm sooner but it drops off. I was not interested in e85 or race fuel at the time as flex tune did not exist -if doing it again then yes maybe I would look at GTX turbos or similar and try smaller housing and rely on higher boost (with e85) for power. Or standard turbos but max out the boost and more room for timing up top with e85.

    Don't get me wrong the GT2860RS with .64 is a great choice for Z32 and matches the volumetric efficiency of the motor really well. They wouldn't be a good candidate to reliably mae over 400rwkw on pump fuel and safe tune though and that's what I wanted. Horses for courses and all that though.

    Honestly I appreciate the input and discussion but it's frustrating when people think that because you disagree or haven't done what they would do that you don't understand how it works. Not to mention again we are way off topic.
     
    Last edited: Jul 14, 2014
    rob260, Jul 14, 2014
    #59
  20. SRB-2NV

    SRB-2NV #TEAMROB

    Stock turbo actuators can hold 17PSI no problem and can hit 24PSI in the midrange on standard turbos, the only reason it drops to 17 is the standard turbos choke. On Robs 2871R's it is what it is, it holds the high boost and runs low pressure actuators.
     
    SRB-2NV, Jul 14, 2014
    #60
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