JBR under car piping video.

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

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  1. Faeker

    Faeker Greenie Member

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    Saw this today. Has it been seen by anyone else or sent to jbr? It's kind of unsettling. Having the piping diameter change on the fly will cause some tuning issues I'm sure nit to mention lag since the diameter keeps changing.
     
    Last edited: Feb 13, 2016
    Faeker, via a mobile device, Feb 13, 2016
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  2. Quigs

    Quigs Greenie Member

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    Hmmm, that's interesting for sure. I wonder what turbo/how much boost that is.
     
  3. Faeker

    Faeker Greenie Member

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    The author says 20 psi in the description. He doesn't show proof though.
     
    Faeker, via a mobile device, Feb 13, 2016
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  4. CmdrShepard

    CmdrShepard Greenie Member

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    Yeah, that is pretty intresting.
     
    CmdrShepard, via a Nexus device, Feb 13, 2016
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  5. MazdaMovement

    MazdaMovement Social Media Partner // MSO Greenie Member

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    Let's see if @JBR can pop in and give his opinion.
     
    MazdaMovement, via a mobile device, Feb 13, 2016
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  6. Faeker

    Faeker Greenie Member

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    Is he here? Didn't know whether or not he made an account
     
    Faeker, via a mobile device, Feb 13, 2016
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  7. MazdaMovement

    MazdaMovement Social Media Partner // MSO Greenie Member

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    Yep.
    [doublepost=1455417930][/doublepost]Jamie is a good guy and we totally support him. That vid is strange though.
     
    MazdaMovement, via a mobile device, Feb 13, 2016
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  8. Quigs

    Quigs Greenie Member

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    Ah. Didn't see that when I clicked on the vid. Well then, definitely very interesting. I'm wondering if this phenomenon could explain some of the lag I've been experiencing lately.
     
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  9. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    I saw that in person. It was for sure eye opening. Couldn't believe my eyes!
    [doublepost=1455418805][/doublepost]
    BNR S4 with 20-21psi. I tuned the car.

    I'm not the author of the video. However, the author is a mutual friend of both of us. I have both datalogs and the dyno runfiles for that car. I can certainly atest the tune is very mild.
     
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  10. Quigs

    Quigs Greenie Member

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    That certainly moves a shit ton more air than my wimpy K04 at 20 psi.

    But, I have always thought my car was somewhat laggy when compared to some friend's cars with identical mods except for me having JBR pipes instead of aluminum. Still makes me wonder if the expansion of the silicone could explain it.
     
  11. Bigbootylicious

    Bigbootylicious Greenie N00B Member

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    Yepp 20-21 psi bnrs4

    Tuna is Poon flavored tang

    Friend took video dueling our dyno session today
     
    Bigbootylicious, via an iPhone, Feb 13, 2016
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  12. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    Actually, in this scenario 21psi k04 would be the same as a 21psi BNR S4. Turbo size has no impact. The same amount of pressure would be exerted along the wall of the tubing regardless of what turbo was on it.
     
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  13. Redline

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

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    So the bigger turbo will flow a lot more volume, but the pressure will still be the same, right? That's why a GT3582r, for instance, at 20psi flows waaaaaayyyyyyyyy more than something like my BNR S3 at 20psi.

    Regardless, I have this silicone piping kit. This vid makes me pucker a little, LOL. Lag isn't an issue with my S3. I sure am glad I have my hose clamps on good and tight, though!

    Thing is, I run a TR8C with center, 3" inlet/outlet, and a UR crashbar that I custom hung the intercooler on, so the install flexibility of silicone piping was a big asset for me since I have an unusual setup. I had CX piping before, and it worked, but fitment was not good, and when I took it off I could see that a coupler or two was getting pretty close to rubbing through.

    o.0
     
  14. JgamB

    JgamB Greenie Member

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    I have the same kit and a lot of WOT miles on it at 25psi / BNR S3 and haven't had any issues. This does pucker my anus though because my built engine was wrapped up yesterday, and the plans are 30+ PSI. I'd like to know if Jamie has confidence in this piping to hold 3.5bar pressures.

    I don't experience any lag from it - honestly this phenomena probably helps performance as piping size increases with pressure / flow. It's just worrisome it may burst once I start pushing for ~550.
     
  15. Poon_Flavored_Tang

    Poon_Flavored_Tang Greenie Member

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    Flow does not exert pressure on the inside wall cavity. It is a function of pressure. Pressure =/= flow. Doesn't matter what turbo it is really it can be a K04 or a 9180 there's going to be the same amount of presssure - in this case 21psi - along the insides of the piping.
     
  16. Redline

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

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    Right. So what I said, right--larger turbos flow a much greater volume of air, but still at the same pressure? I need to bone up on my fluid dynamics :) Pressure and volume are separate variables, as I understand it.
     
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  17. LOLWRX

    LOLWRX Greenie Member

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    I would like to hear some input from jbr on this. I'm running 25psi on a bnr through it also. That video scares me haha
     
    LOLWRX, via an iPhone, Feb 14, 2016
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  18. OCD

    OCD Greenie Member

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    That does not look like fun. Not sure what else could be done to resolve it except metal.


    Sent from my iPhone using Tapatalk
     
    OCD, via a mobile device, Feb 14, 2016
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  19. Beans

    Beans Greenie Member

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    I think freektune blew that section out at the drag strip.
     
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  20. LOLWRX

    LOLWRX Greenie Member

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    Pretty sure he had a Cobb piping kit at the time, not positive though
     
    LOLWRX, via an iPhone, Feb 14, 2016
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