Jump to content
SAU Community

Flutter noise - How?!?!?

[R31][Silhouette]
 Share

Recommended Posts

[R31][Silhouette] Contributor

[R31][Silhouette]

Posted
Posted

Hey Guys,

I've got a silvertop rb20det - I've asked this question before but never got a proper answer - does anyone know how to get the flutter (intercooler dose) noise

instead of the stock 'pssshht' noise?? Has anyone experimented and got results? People have said 'bigger cooler, more boost' but I'm pretty certain that's not the case!

Any ideas?

Cheers

Link to comment
https://www.sau.com.au/forums/topic/39443-flutter-noise-how/
Share on other sites
WHITE R32 Grand Master

WHITE R32

Posted
Posted

the sound u can hear is called compressor surge or compressor stall.... what it is is compressed air trying to come out of the air inlet on your turbo and hence trying to stop the wheels spinning... mainly cause u are using a small bov or no bov or have it set too tight.... this causes excessive pressure on your turbo and can cause premature failure due to excessive load caused by the stalling..... most cars will have a bit which is ok but if it happens alot and at high boost levels id look into getting a better bov....

basically what im trying to say is if u want the noise tighten up your bov or block it off though i dont advise this cause of the afforementioned circumstances.... dunno if that helps or not.... cheers Jon

Link to comment
https://www.sau.com.au/forums/topic/39443-flutter-noise-how/#findComment-801283
Share on other sites
[R31][Silhouette] Contributor

[R31][Silhouette]

Posted
  • Author
Posted
Steel, just make a cut out, this is not dangerous btw! Been running my car like this for 2 years without a bov at 14psi!

Hmm.. so do I remove the stock bov - by undoing those two bolts? then take that off and put a steel cut out in it's position? Is that right??

I've never removed the standard bov before - so don't really know what to expect!

Cheers

Link to comment
https://www.sau.com.au/forums/topic/39443-flutter-noise-how/#findComment-801295
Share on other sites
WHITE R32 Grand Master

WHITE R32

Posted
Posted

this is a very debatable issue as to weather or not it causes dramas with bearing wear etc ..... but after spending 2k on a turbo id hate to have a warranty voided by just wanting a "cool" sound.... its not worth it in my eyes.... but having said that ca18det's dont have a bov std and neither do alot of opther cars... but rb's have them for a reason and ill keep mine that way...

Link to comment
https://www.sau.com.au/forums/topic/39443-flutter-noise-how/#findComment-801296
Share on other sites
jaqule Grand Master

jaqule

Posted
Posted

BelGarien has a nice flutter affect in his BOV , he has a HKS SSQ and he has just removed the fins , I think he said , you may have to ask what he did exactly but I do know that he still has his BOV on

Link to comment
https://www.sau.com.au/forums/topic/39443-flutter-noise-how/#findComment-801301
Share on other sites
MSPEC Mentor

MSPEC

Posted
Posted

Nope, though its probably best not to do it on a standard turbo. I dont really mind who does or does not do it. Fact is I have always done it, for no real reason but its been fine. Benny boy at Race Pace aint fussed either way so nor am I.

Link to comment
https://www.sau.com.au/forums/topic/39443-flutter-noise-how/#findComment-801445
Share on other sites
DentonR33 Rising Star

DentonR33

Posted
Posted

Yer i did it and my turbo went bang :( probably would have happened regardless though as was running more boost.

I also did what steve did although i refitted the bov on top after i had put a steel plate over it. Then you have to block up two holes, a bolt works good on the smaller one and the end of a broom worked a treat on the other one. hehehehe :) weeeeeeeeeeee vromm chh chh chh chh

Link to comment
https://www.sau.com.au/forums/topic/39443-flutter-noise-how/#findComment-801480
Share on other sites

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

    • GTSBoy
      Ball bearing turbos

      By GTSBoy · Posted

      The cross sectional area of a circular hole scales with the square of diameter. So a 2mm diameter hole is 4x the area of a 1mm hole. Not double. The 1.7mm hole is nearly 3x the area of a 1mm hole. You do not need restrictors at both ends of the oil supply line. If you have new, additional restrictors at the turbo end, that you did not have before, then you do not need a restrictor at the inlet end.
    • sunsetR33
      Ball bearing turbos

      By sunsetR33 · Posted

      Hi all. Been a while but things are moving along. I just have something that I am wondering about. Since I will use OEM turbo oil pumbing, I got myself a new bolt, the one that goes into the engine block oil feed. As I recall (and see visually) this bolt comes restricted with I think a 1.7mm hole? Not quite sure but it was something around that size. The turbos have 1mm restrictor bolts installed, as necessary due to ball bearings and my higher oil pressures. Can I now just use that OEM bolt with the 1.7mm hole in for the engine block or will this actually be too much oil flow restriction and I have to drill it out first? In my head it would make sense for the bolt to be at least 2mm wide as both turbos take "1mm of oil flow". Do let me know if my logic is flawed here, I just want to make sure I don't kill my turbo bearings with too little oil. Don't know if I can trust the saying I read somewhere that ball bearing turbos essentially only need an oil mist
    • GTSBoy
      R33 GTST Axles

      By GTSBoy · Posted

      There are several aftermarket options available, from not-too-painful moneyhttps://justjap.com/collections/driveshafts-bearings/products/d-max-reinforced-replacement-rear-driveshaft-set-fits-nissan-s13-s14-s15-r32-r33-r34-c35 and  https://justjap.com/products/crank-motorsport-billet-rear-axles-fits-nissan-skyline-r33-gts-t-r34-gt-t?srsltid=AfmBOorQk4xkGUa98kO7v2ePLUiNt-HRrM2AwWNw9mbSIVE1ujBVwY__, all the way up to The Driveshaft Shop https://driveshaftshop.com/skyline-cv-axles/
    • jdniss
      Forced Performance Hta Turbos

      By jdniss · Posted

      Yeah based on old XRC5964S specs, it looks to be roughly GTX3576R sized? But this 5964S compressor will flow 90lb airflow somewhat similar to the compressors in both the GTX3584RS or G35-1050.. I fully expected the 0.64 rear A/R to choke up top - seems way too small from typical convention - but these are seemingly beneficial over the prior 0.82 results.. Be interesting to see if he comments on the EFR question in that thread - he mentioned in a prior video that BW EFR's were the "cats pajamas 10 years ago", but by the sounds of things all his kits have been using Xona for quite a while now.
    • thozza
      Intro/R33 owner

      By thozza · Posted

      Yeah it’s still got the oem manual gearbox and clutch, only kinda mods are a blow off valve, coil overs, and a aftermarket intercooler. Also had it for about 2 months now with a lovely midnight purple paint on it.
×
×
  • Create New...