JBR under car piping video.

Discussion in 'Mazdaspeed 3 General Discussion' started by Faeker, Feb 13, 2016.

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  1. Enki

    Enki Motorhead Platinum Member

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    And both probably have different designs on that wheel. AR of the hotside is a factor in spool, and so is comp wheel design (but to a much lesser extent).
     
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  2. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    They are both based off a Garrett turbine wheel. In fact the HTA3586 is exactly a GT35r exhaust wheel. If I remember correctly the BNRs4 is the GT30r exhaust wheel. @JgamB potentially could elaborate more on that.

    The BNR also uses a smaller A/R on the hotside, which should spool faster. Although, the compressor wheels are different. The most notable one being cast vs billet. I would imagine the hotside would be more important to spool though.
     
    Last edited: Feb 15, 2016
  3. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    It's pretty simple for me: GT3076s spool faster than GT35s. A BNR S4 is a GT3076 "lite," with smaller wheels/housings. I realize it's not DBB, but if anything, I think it'd be faster than a regular GT3076, let alone any GT35-framed turbo. But my logic may be failing miserably...
     
  4. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    @Redline I just think @Enki is trying to over-science it lol.
     
  5. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    SnailD had an S4 spooling by 3,600 in CO alititude, IIRC.
     
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  6. Faeker

    Faeker Greenie Member

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    Can't over science what's already factual. Look at their specific specs.
     
    Faeker, via a mobile device, Feb 15, 2016
    #66
  7. f1puertorico

    f1puertorico "I hate when I drop nuts" Greenie Member

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    BNR S4. received_1135917313114997.jpeg
     
    f1puertorico, via a Nexus device, Feb 15, 2016
    #67
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  8. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    Last edited: Feb 16, 2016
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  9. f1puertorico

    f1puertorico "I hate when I drop nuts" Greenie Member

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    Looks steeper than mine a bit. Probably Rob don't want to granade my stock block lol.

    Sent from my Nexus 6 using Tapatalk
     
    f1puertorico, via a mobile device, Feb 16, 2016
    #69
  10. Mikey

    Mikey Greenie Member

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    I run this kit with 33 psi. I have had the shitty synapse bov snap in half while no issue with my jbr cold side. If he has tested like he mentioned at 40 psi I am sure we are good.

    My HTA3076 I spool 20psi around 3300 rpms.
     
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  11. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    The BNR is right with it. 20psi @3407rpms according to the log.
    [doublepost=1455599469][/doublepost]
    It looks steeper b/c of the scale.
     
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  12. f1puertorico

    f1puertorico "I hate when I drop nuts" Greenie Member

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    I got surprised with the spooling time. Very very close with the S3, but with a robust top end. I cant wait to finish tuning this thing. Winter its a bish.

    Sent from my Nexus 6 using Tapatalk
     
    f1puertorico, via a mobile device, Feb 16, 2016
    #72
  13. Mikey

    Mikey Greenie Member

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    what HP does the S4 die out at? You would think the 3076 would have more top end?

    F1puertorico, I am curious to see what you end up with. Are you built and who is tuning you?
     
  14. f1puertorico

    f1puertorico "I hate when I drop nuts" Greenie Member

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    Stock block. Finkle takes care of the tuning. Goals are 380whp. I might do a pop and drop later this year.
     
    f1puertorico, via a Nexus device, Feb 16, 2016
    #74
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  15. Mikey

    Mikey Greenie Member

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    Gotcha, was hoping you had a built block so we could compare, especially for the price of the S4.
     
  16. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    Now that's more like it. The old graph showed 20psi by like 4,000. This seems much more reasonable and what I expected based on the specs of the S4 in comparison to a regular GT3076. What's your altitude in NC, BTW? Bang-for-the-buck wise, that's hard to beat. I'm sure @Mikey 's HTA3076 has waaaaaayy more top-end, though. He pulls trains on my S3 and is easily at 500+whp.

    Fortunately, I've had much better luck with my Synapse. Love it and holds like a champ ;)

    Not apples to apples, but here's my S3 vs. a GT2876r (pretty sure we both would've spooled earlier if we went WOT sooner). I don't think the JBR piping is negatively impacting my spool at all. My ramp-up is nearly that of a K04:
    upload_2016-2-16_0-45-15.png
     
    Last edited: Feb 16, 2016
  17. f1puertorico

    f1puertorico "I hate when I drop nuts" Greenie Member

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    That hose should hold... I would put a coil like they do with Diesel boost tube to keep that expansion in check.

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    f1puertorico, via a mobile device, Feb 16, 2016
    #77
  18. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    What you were noticing was the phenomena between 3rd and 4th gear spool times.
     
    Poon_Flavored_Tang, via a mobile device, Feb 16, 2016
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  19. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    Oh, the other graph was from 3rd? Yep, that'll definitely make it take longer, haha.
     
  20. WetzMS3

    WetzMS3 Greenie Member

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    I'm kind of lost as to why you guys are comparing logs and spool at all, let alone on different setups.

    Isn't the real issue and largest concern of this development, potential catastrophic failure of the silicone piping? I don't recall reduced spool even being an advertised benefit of this kit, could be wrong there. However, a couple hundred RPM of spool makes no difference either way if the risk of the piping failing altogether is remotely possible. Pop a coupler on the side of the road or at the track, its fairly easy to fix. Blow a hole in the entire cold or hot side silicone piping, and you need a tow.

    I think the real question here is, what was the point of failure when tested? What kind of longevity tests have been done and under what conditions? If it has actually been proven that this repeated flexing does not reduce the lifespan or add stress to the silicone, then by all means worry about a couple hundred rpm worth of spool.

    I may have missed something in all of this.
     
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