Jump to content
SAU Community

Craziest Flutter Noise

R34NRG
 Share

Recommended Posts

SKY031 Grand Master

SKY031

Posted
Posted
most flutters i hear pitch up

Interesting, I thought it would be physically impossible for flutter to pitch 'up'.

Got any examples?

I'd be ultra keen to hear any flutter 'pitch up'.

* takes away andru's thread making privileges

please.

  • Replies 51
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Posted Images

GTR_VSpecII Explorer

GTR_VSpecII

Posted
Posted (edited)
Exhaust wheels (Turbine wheels) do not have nuts.

They are fused to the shaft, And the compressor wheel is reverse thread.

Its more likely to sheer the shaft and snap it in half which i have seen :wave:

Compressor wheel is what I ment, yes.

Here is a pic of a spear turbo for my boat.

Jason.

post-4149-1159777334.jpg

post-4149-1159777362.jpg

Edited by GTR_VSpecII
SKY 34 Mentor

SKY 34

Posted
Posted

They get the sound by sandblasting the blow off valve with HKS sand

http://www.skylinesaustralia.com/forums/in...howtopic=110974

lol..I thought Bass Junkie was for real..I went...Wuuut the!! + club exec ><

I think the sound is from a closed loop BOV. It isn't an open atmosphere. <<< and no...if you have a plumb back or an atmo BOV installed, once the throttle closes, the excess air between the turbo and the TB is either being plumb to before the turbo or discharged into the air...making no fluttering sound at all.....depending on spring rate/amount of air vented or plumb back

I would imagine having a larger volume intercooler would produce a lounder fluttering noise due to larger volume of air closed off.....I think that is why the HKS GTR has such a loud fluttering noise....

also by having no BOV or bypass valve, as the throttle body opens again, there is a ready supply of air to be sucked into by the vacuum into the plenum...in contrast to having the air dispersed somewhere, requiring the compressor to work quite a duration to re-fill the vented air....so more responsive without the BOV...it will be damaging I suppose but who cares...they have plenty of turbos in stock, the main thing is to impress the press!!

I think the ceramic turbine is only at the exhaust end...if I remember correctly, the intake is made up of sumthing different just to prevent the turbine from smashing to bits "ceramic blasting" the cylinder... the ceramic turbine tends to shoot out of the exhaust if boosted to about 1.0 - 1.2bar..or so I was informed ><....so the ceramic bit will not be affected whatsoever by producing the flutter....

I used to think that the fluttering come from the "sequential BOV" due to it's name "sequential"...it'll be amazing to note how many ppl think along the same line~~... and sad to say I eded up with a HKS sequential BOV

I went ..huh where's the su-to-to-to-to-tooo sound...

and buy those HKS sands...it works magic..my engine is all shiny remember to flush with turtle wax after~~

  • 10 months later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • V35_Paul
      Rv37 400r questions

      By V35_Paul · Posted

      A locally delivered Infiniti have remote start installed but don't come with the remote start key. You need a new remote start key and they just need it programed. And this is different to making/programing a new key that just starts the car.  
    • Lithium
      Shoota's R33 GT-R RB30/26

      By Lithium · Posted

      Cheers, and cheers for sharing so much of the build and also sharing the glimpse of what turns out to bring a lot of us poor decision makers together haha.  I do recommend learning more about how to manage it, if not considering getting a  formal diagnosis.  The discussion with the psychiatrist I got my diagnosis through was quite eye opening, things I'd not even considered to be ADHD related and hadn't mentioned were things she asked about out of the blue and were common themes with people with my flavour of ADHD.   It's not a label for people who are hyperactive and ill-attentive, there's more to it than that and some of it can be much more challenging or damaging - though there are of course two sides to the thing, and a lot of the stuff we have to go through and work on to live with it make us effectively "better" at other things as well. Aside from the fact that there is some argument I could have a bit of ASD seasoning in there (came up during the diagnosis, and neurodiverse things seem to not stay as a cookie cut) I suspect you need to learn more about ADHD if you are puzzled about how hyperfocus could possibly apply.  I *do* personally use "superpower" with quotes deliberately, but it's 100% an ADHD thing due to the exact reason that lack of focus is also an ADHD thing... Loosely speaking the inattentive side of ADHD isn't the inability to focus, it's the inability to control where the focus goes.  Not being able to sleep because brain is more interested in thinking about a stupid thing I said to a girl I liked 30 years ago, not being able to focus on work because my brain is more keen on putting together the torque management strategy we're going to try out with a drag car next weekend, not being able to focus on a conversation with someone I WANT to listen to and respect because there is a flickering light in my peripheral vision.    If I could just stop work and build the torque management setup right there and then I'd not hear anything else until it was done.  
    • Shoota_77
      Shoota's R33 GT-R RB30/26

      By Shoota_77 · Posted

      Maybe you should do some more reading.  Google positive effects of ADHD and you'll get your answers.  One of my personal downsides of ADHD has been talking before I think.   Maybe you have it too?
    • GTSBoy
      Shoota's R33 GT-R RB30/26

      By GTSBoy · Posted

      Excuse me for butting in....but which part of ADHD can be considered a superpower? I would have though it far more likely that some ASD comorbidity is more likely to be contributing to an ability to hyperfocus on something. ADHD being aimed somewhat in the other direction. My shed looks like your shed. My whiteboard list of unfinished projects has entries going back 15 years. I know what you're talking about - I just struggle to connect ADHD to the results being discussed.
    • Shoota_77
      Shoota's R33 GT-R RB30/26

      By Shoota_77 · Posted

      Thanks for reaching out!  It's a blessing and a curse at the same time.  I'm undiagnosed but it doesn't take a rocket scientist to see it in me... I have more half started projects laying around my house, shed, garden, etc taking up space and money, destroying aesthetics than if I added up all of my mates projects together. But, ADHD gives me the ability to hyper focus on things that no mere mortal could even  comprehend.  A recent pool build is an example of that....  I dont know anyone else that would be dumb enough and focused enough to take on then complete something of that magnitude. I call ADHD a superpower but it can equally be completely destructive if not controlled and focusedon the right places. Addiction is a major concern to ADHD people and thankfully my addictions have been no worse than projects, XBOX, chocolate and being an arsehole! It's often hereditary and my 13 year old son is currently learning how to drive it at the moment. Keep lurking! If i can finally finish this bloody thing at some point it will be a win for all of us ADHD'ers! 🤪
×
×
  • Create New...