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Help! Looking For "Perfect BOV Sound"

Tonba

By Tonba,
in Engines & Forced Induction

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Ruffels Veteran

Ruffels

Posted
Posted

basically you just have to tighten up your aftermarket blow off valve.. or put a plate inbetween your stock blow off valve... or for that fact even remove it and just put a plateover the hole to stop it from being plumbed back or vented... that way the air will have no where to go and ;)... go back through your turbo and out your pod lol... this then making the flutter noise... there are huge debates as to whether or not this royally ****s your turbo.. its know that its not "good" for your turbo, but has been settled upon that on low boost it isnt ogin to wreck your turbo, just perhalps shorten its life.

if you want a VL sounding flutter then you will probably want to get a front mount IC if you dont allready have one as it is said to enhance the flutter noise

ive currently got my stock welded over blow off valve on my car at the moment so i get the flutter... but i usually just have my stock unwelded one on there... just felt like a bit of a change last week :)

-Ruffels

jezzerrr Rising Star

jezzerrr

Posted
Posted

no, it whistles. like Nfsu2, fast and the furious, etc

edit: but you can achieve it to a degree by winding down the spring ie making it tighter. this will cause "reversion" which will cause the chatter noise you are talking about. There is debate as to just how bad this is for your turbo... I think so long as you have air coming out of your BOV (ie turbo is still spinning forward), it's not too bad.

sky_m6m9 Enthusiast

sky_m6m9

Posted
Posted
++++

Greetings All.

Oh...I thought the HKS SSQ BOV made this noise...?

Bugger...

Cheers Guys,

--Tonba

++++

SSQV is the perfect sound whistling is the best sound u can ever want to have =) I have it on my 33 and its the best, Supersonic type bov, that makes those Pssh sounds, sounds better on the WRX's.

«Cyph3r» Experienced

«Cyph3r»

Posted
Posted

hmmm hks ssqv sounds like a bird dying or getting sucked into the turbo or something, i don't like it hey.:whatsthat

for the, as you decribed it, perfect bov sound

1. buy a vl turbo

2. make sure its an auto

3. get the biggest bov you can find

4. get a fmic so everyone can see your cars turbo

5. get a pod filter

6. tighten the bov as much as possible

7. sit at traffic lights/pedestrian crossings/intersection and hold your foot on the accelerator and brake at the same time and then back off the accelerator.

8. look around to make sure everyone is looking at you

9. take off doing a sick one wheeler :burnout:

Disclaimer:This is not intended be provoking everyone with vl turbos, only the ones that do shit like this. :sly:

PS back to the point of the thread.

You can get the "fluttering" noise too if you have an external wastegate, different gates make different noises when you back off and some seem to make an almost fluttering noise as you describe.

The bov fluttering noise everyone says is bad as its reversion but my old 33 made the fluttering noise as i had no bov at all and the hks turbo on it had no shaft play last time i checked and still worked well.

Jamie

TTT Grand Master

TTT

Posted
Posted
You can get the "fluttering" noise too if you have an external wastegate, different gates make different noises when you back off and some seem to make an almost fluttering noise as you describe.

*makes Cyph3r a badge that says "I have never heard an external wastegate in my life"*

wear it proudly my good man.

perhaps someone with an external wastegate that is open to atmo will see you with it and take you for a spin to let you hear the sound that an external wastegate dumping to atmo actually sounds like.

«Cyph3r» Experienced

«Cyph3r»

Posted
Posted
*makes Cyph3r a badge that says "I have never heard an external wastegate in my life"*

wear it proudly my good man.

perhaps someone with an external wastegate that is open to atmo will see you with it and take you for a spin to let you hear the sound that an external wastegate dumping to atmo actually sounds like.

lmfao *grabs the badge and pins it to my shirt*

i have definately heard one before mate, i wasn't talking about when it is wide open on full boost and it roars, i was talking about on gearchanges.

maybe its just my old car and my mates car that do it and all the rest in the world don't but they distinctly made a segmented rather then continuous noise. on my mates car you could hear the bov was continously open while the wastegate "sounded" like it opened and shut a few times.

Jamie

TTT Grand Master

TTT

Posted
Posted

so describe this sound.. or record it and attach here.

it could just be that the bov wasn't able to vent enough.. and therefore even though it was venting everything it could, there was still some reversion through the turbo..

I really can't see how a wastegate that needs say 15psi of pressure to open could close and open on gearchanges.

I don't see how there can be fluctuating pressure in the exhaust manifold/turbine area during gearchanges which go from 0 to somehting above the spring pressure of the wastegate to cause it to open and shut.

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