Jump to content
SAU Community

R33 Stock Bov Flutter Sound - Whaddaya Reckon Of This?


Recommended Posts

Techinically its not legal as its making noise.... You will soon get over it as it will get old quickly!

This will not get the bishes moist!

  • Like 1

To your dignity.... yes....

There are SO many topics on SAU about BOV's and not running them, blanking them etc............

My understanding is that you could bend your turbo blades. By Blocking off the BOV the built up pressure that normally gets released to atmosphere or recirculated, has nowhere to go but back though your turbo and as such temporarily stalls the compressor, which can bend or brake the blades, and the stalling of the compressor is what gives the flutter sound.

  • 3 weeks later...
  • 1 month later...

Lawl! These threads always deliver!

But the whole flutter thing will soon be annoying for a daily drive!

AND you can get EPA's based on it anyway as its still creating a sound!!

In other words, DONT DO IT!

You f*#@Kin idiots..... The 'flutter' sound is called compressor surge. it is NO GOOD for your compressor blades, it slows down your turbo from spooling in between gears and in worst cases, f*#ks up your compressor blades.

Sometimes when people get too ambitious with sizing their aftermarket turbo and get the housing sizes wrong, or over fueling at idle because they didn't reconfigure their fuel map properly after they fit a bigger turbo, compressor surge OR 'flutter' is the result.

The whole purpose of having a BOV is to release the excess boost so it doesnt slow down your turbo in between gears.....its for response.....WTF would you sacrifice response for a sound ?????? fu*kin idiots

Man, I really wish these kids learn about the fundamentals of engine mechanics before they make a total dick of themselves or worse, totally ruin their cars.

Edited by NATAS

You f*#@Kin idiots..... The 'flutter' sound is called compressor surge. it is NO GOOD for your compressor blades, it slows down your turbo from spooling in between gears and in worst cases, f*#ks up your compressor blades.

The whole purpose of having a BOV is to release the excess boost so it doesnt slow down your turbo in between gears.....its for response.....WTF would you sacrifice response for a sound ?????? fu*kin idiot.

You sir are a f**kwit

Guest
This topic is now closed to further replies.


  • Similar Content

  • Latest Posts

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...