Blow Off Valves

[Xizor]

Hi guys,

Im after a new blow off valve. Have no idea what to go for. Right now i have the stocker in there with basic mods such as turbo back exhaust, pod, fmic, boost @ 12psi. I've finally reached the point where i want a blow off that sounds a bit deeper, a bit tighter. More of a tttsshhhh, instead of a ppsshhhh... if you follow me. A more solid and tight release sound, nothing too crazy though.

Is changing blow off valve allowed? And can it be engineered? I'll be getting my car engineered in the near future.

If someone could comment on whats available out there and what the differences are that would be awesome. Any recommendations would be good too. Thanks!!

[r33_racer]

1. dont be a wank...stick with plumb back...good for performance and doesnt mess with airflow...issues with idle and hunting and so forth.

2. atmo bovs arnt liked by tpt cops and you can and will get fined for it.

3. if your going to buy an a/m one get an ex stock gtr bov or a/m plumb back. Trust me when i say after 6 months to a year you wont want it anymore and will want to revert back to something less annoying and less wankish.

4. R31Nismoid will prob close the thread or another mod...with a comment similar to this. Learn to use the search button

Wasnt intending to be rude either.

[fEkuaR]

Starting off your answer with dont be a wank and then saying you Wernt intending to be rude doesnt really come across that way.

He was asking about the legalities is it alowed and can he get it engineered ... sure he could have probably come across alot of info searching but in know way has he come across a wanker.

xizor atmo bov's are illegal you can and most likely will get defected if you get one. I wouldnt recommend it mate. Stick with the standard one... sure it isnt all that loud but atleast you dont have to worry when the boys in blue ask to have a look under ya boonet

1. dont be a wank...stick with plumb back...good for performance and doesnt mess with airflow...issues with idle and hunting and so forth.

2. atmo bovs arnt liked by tpt cops and you can and will get fined for it.

3. if your going to buy an a/m one get an ex stock gtr bov or a/m plumb back. Trust me when i say after 6 months to a year you wont want it anymore and will want to revert back to something less annoying and less wankish.

4. R31Nismoid will prob close the thread or another mod...with a comment similar to this. Learn to use the search button

Wasnt intending to be rude either.

Edited January 18, 2007 by fEkuaR

[MR 33]

Yes i've been defetced for bov in the past. In no way will you get it 'properly' engineered. Though that's not to say you couldn't with the right people haha. A plumb back is a different story though as it keeps everyone happy, but you won't get your 'psssssh' noise. Up to you really...

[r33_racer]

yes i know...things come across the wrong on the net...everytime. When your saying things in a loose context or in a slangish lazy manner people take it the wrong way. Hence why i said at the end i wasnt intending to be rude.....maybe i just like to use the word wank?

[Xizor]

Im sorry, why wont i get the blow off noise with a plumb back? I was of the understanding the stock one is a type of plumb back, and it does its soft woosh courtesy of me having a pod filter.

As i said im not crazy or interested in anything thats a big no no, so definitely not interested in atmo's. I did do a search and it seemed to just come up with loads for sale. Which doesnt really help me because i dont understand the differences in brands or specs to know what suits what im after.

I guess im looking for information on what else is out there that functions the same as the stock, but better for a modded car running higher boost, and doesnt sound quite as soft? I want the sounded to suite, so a bit more manly.

[r33_racer]

youve basically answered it in your own words....plumb backs dont make noise cause the air is sent back to the turbos intake. Only the feint whoosh from the pod filter as you said already. Anyother plumb back or similar bov will only make the same noise. Only way to get any noise or anything louder then std bov is an atmo one...but it will probably be over the top for what your thinking of.

I have a hks ssq at the moment...but its shitting me...so im going to machine up an adapter to suit so i can plumb it back into intake, like a std setup.

When it comes to bovs there isnt exactly a great deal in it...theres atmo, plumb backs and then 50/50 atmo/plumbacks in one!

[Anthrax....R33]

i have the ssqv too.....nice sound, if your into that sorta thing, and deals with any idoling problems common with the 33 after fitting an external wastegate

[markimak]

stick with the stocko...

anyway.

so the GTR BOVs will fit the Standard RB25 mounting place..? are they larger or give a gain in pressure release when u hit some higher digits.?

[Xizor]

I understand what your saying, but i've heard a few different 'lines that had pod filters and plumb backs and they're blow off noise was definitely different to mine, atleast enough to notice.

Perhaps a GTR one is up my alley?

[r33_racer]

hmm maybe...ive never noticed anything different about them...maybe their intake was an ally pipe, maybe a steel pipe, maybe plastic downpipe...maybe someones was a 2.5" pipe or a 4" pipe or something in between...all those things could affect the sound...probably even the type of pod filter you have and how long the inlet tract is. Anyway its upto you, atleast theres a little bit more info in here...might help to think it over with whats available.

If you wanna know about brands and types...all you need to do is buy a few car mags....HPI, ZOOM, HOT 4's and the other usuals...there is always different bovs for sale there all with pics and descriptions and prices. Will definetely help with the pick.

Edited January 18, 2007 by r33_racer

[Xizor]

Yeah cheers for that!

Also, whats a type RS? i've seen it mentioned a few times, even accross different brands i think.

[Dav]

ive got a trust plumb back on my 33 with a pod and it gives a heaps diffrent sound to the stocko one, they dont all sound the same.

[aDrew_C]

A Single GTR bov is a direct bolt on replacement for an RB25, it does have a tighter, more refined sound that actually has a note to it rather than just air moving that my RB25 one had. I plan to plumb mine back, but the microtech probably wont like that so I'm waiting for when i next need a tune.

[Xizor]

So the GTR one is not plumb back by default? Is it easy to do?

[Furiuz]

hey guys i have an rb20, standard bov, but with a k&n pod filter. i swear to god the pod lets out a sound as loud and nice as most bovs i have heard. a mate of mine with an sr20 bought the same pod for his car and it started makin a similar noise. i really think it depends on the type of pod you have!

dont bother with the atmo, it aint worth the defect....my 2c

[andz]

get the HKS SSQV

sounds sexy

u can get it quite cheap from nengun.com

*edit* heres the link http://www.nengun.com/hks/ssqv-kit

Edited January 19, 2007 by andz69

[Xizor]

i have the ssqv too.....nice sound, if your into that sorta thing, and deals with any idoling problems common with the 33 after fitting an external wastegate

sorry mate can you explain that last part?? im actually looking at getting this bov now... either this or a greddy plumb back? is the ssqv plumb back??

[R31Nismoid]

Dont listen to that last part.

Anthrax has no idea what he is talking about unfortunately

[jeffworld2]

keep he stocko on, and put a deceptor pro in the front drivers side intercooler piping, down in the wheel well. that way you can turn it on and pssssht away and off and the noise is gone. i have a blanking plate for the stock bov, or you could leave it stock if you can set the deceptor spring low enough i guess

instead of having the a/m one switch to plumb-back or atmo, totally block the polumback one and you will have no issues. if you want flutters, just put a blanking plate on the stocker your pod will do the rest.

changing pods will change your stock bov noise dramatically