Jump to content
SAU Community

Recommended Posts

I think its something along the lines of

"me and ma bros are gunna head down to telopea st to get some tabouly and chek out ma mates new fully sic skyline with tha new fully leather interior, man i got aboused on tha forums todayy man those west aussies dont know nuffin eh bro."

What u guys are missing is that his stock blow off valve is different from all the other stock blow off valves that have been manufactured in the past :thumbsup:

how about we all stop the ****ing bullshit and keep on topic ffs,

Rossco, after doing some reasearch on fluttering i have found general its a bad thing, i have a hks sqv bov and it does flutter, general under low speeds. A friend also has a sqv on his s15 and it also flutter under low speeds.

I know for a fact that one jap brand bov does make the fluttering noise, i think it may be blizt but i cant remember.

But before you go and change your bov, think about this for a second; once replacing the bov it will results in your afr going abit rich, and may results in the car becoming abit slower (i will have to dig up the thread but one wa member memtion what affect changing the stock bov had on 1/4mile time etc)

ohh ps. im not sure where stock bov are but i found that the s15 which had the bov just after his plenum (greddy) was able to get abit more flutter noise and before people say they arnt setup right well they are

OK.

Every VL where I live does it.

Its easy. Find ur Blow off valve, modded or stock. Pull out the vaccum line hooked to the BOV and put a screw in it to block it off- it must be sealed completetly or there is a vaccum leak. That or run NO blow off valve at all.

Then. Make sure you have a Aftermarket cooler.

Then listen to the masssive CHO CHOC CHOC CHO VL style flutter. Its just common in VLs cos there too poor to fit a BOV/too dumb to put one in.

Its also known as DOSE! Its a favourite with the Chapel Street VL crew round here, u hear them flog it and let go. I must say thought it sounds pretty cool, but

a. its illegal

b. it attracts unwanted attention

c. It scares old people/kids/animals

d. It makes the compressor blades slow down, so not a performance mod

e. the guys that have it act like heros, but there just displaying there ignorance.

My suggestion is, run a aftermarket BOV with a harder tension, you will get a nice crisp flutter at low revs and clean pstchhhhhh at higher. I personally used a turbosmart V Port II on my old skyline and it had a great, non annoying noise.

I had massive flutter when the piston in my bov seized (no not a pisstake- the cheaper aus made ones seem to rely on blow by oil to stay lubricated). Recipe is big turbo/boost, no bov and pod. Sounded cool for about 5minutes after which it becomes ****ing annoying. I had around ten people ask me what type of bov I had when I took the shitter to the drags.... simple answer: a broken one!

Its also known as DOSE! Its a favourite with the Chapel Street VL crew round here, u hear them flog it and let go. I must say thought it sounds pretty cool, but

a. its illegal

d. It makes the compressor blades slow down, so not a performance mod

just on these two.

Dependingf what model car it is legal to have run no BOV

And you only notice the performance side of it in a manual, something to keep in mind... the autos just keep pumping along like most of the VL's here in Mexico :rolleyes:

R31Nismoid.

Yes the VLs dont need it so its legal, but this is SAU so for the budding SAU enthusiast that wants it on his skyline, it is illegal.

Excellent point made about the autos, It does seem actually that most of them that have the big flutter are automatic anyway so I suppose it shouldnt affect there straight line performance. Good on them.Hate to be going up some twistys though up a hill when you have to be on/off the throttle. :burnout:

']ohh ps. im not sure where stock bov are but i found that the s15 which had the bov just after his plenum (greddy) was able to get abit more flutter noise and before people say they arnt setup right well they are

Just after his plenum? So after his throttle body? Of course he was able to get more flutter noise as it sounds like the setup is completely wrong.

A BOV is there to vent off excess boosted air when the throttle has been closed. If it's on the other side of the throttle it can't vent anything.

']how about we all stop the ****ing bullshit and keep on topic ffs,

Rossco, after doing some reasearch on fluttering i have found general its a bad thing, i have a hks sqv bov and it does flutter, general under low speeds. A friend also has a sqv on his s15 and it also flutter under low speeds.

I know for a fact that one jap brand bov does make the fluttering noise, i think it may be blizt but i cant remember.

Brand is irrelevant. The actual tightness of the spring is all that matters.

just go out and buy ur self GReddy type s BOV and tighten the tension screw, it will flutter like a mother F***er, at lowish revs, and at high revs it will just make the PSHHT noise. thats wat ive got on mine and man does it sound crazy!!

Just after his plenum? So after his throttle body? Of course he was able to get more flutter noise as it sounds like the setup is completely wrong.

A BOV is there to vent off excess boosted air when the throttle has been closed. If it's on the other side of the throttle it can't vent anything.

this setup is normal in s1x type cars, i have seen it just not in my mates s15 but also in s14

The only time my stock BOV "flutters" is when i crank my EBC to about a bar, let it spool up from low revs, then release it before it gets a chance to use the boost (ie, change gears around 4K). It's not the BOV as people have correctly mentioned though rather reverberation through the turbo charger. Not a good thing.

Also, mass_iv is 100% correct, tighten the spring on any aftermarket BOV and it will flutter like a bitch at low revs.

P.S. Mikey, it's not after the plenum/throttle body, ie, not after the air is used, but it is that side of the engine bay on a separate pipe but still part of the pipe that runs to the plenum after the cooler. :P

do a search mate this topic being covered more than enough times...

lazy asses need to use the search option

I wouldnt call it being lazy.

It's obvioulsy a topic ppl like to discuss (30+ threads in this one alone), regardless of how may times it's been covered.

If it's annoying you that much, dont read it.

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


  • 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...