Dump / Blow off Valve .. PSSSHT!

[j0nbubz]

ok guys!

fitted my blitz dd on hotpipe to my S15.. and put a y piece to connect the actuating pipe to it..

what can I do to not make it atmos? I want my old flutter (pidgeon!)

 

[mint]

take out your bov valve and 'plug it' ? there was a tutorial on the other page

 

[ichi-go]

U want ur pigeon and you put an atmo bov? what the hell?

 

[j0nbubz]

I was just kidding.. lol anyways.. my Blitz DD is an atmos bov, there is no way to recirc it right? (there is only 1 outlet on the bov for the actuating pipe)

 

[mint]

i think thats the option, Atmos OR Recirc iirc, but saying that im a total turbo n00b lol, best ask one of these pro's

 

[I-nearly-bought-a-batty]

U want ur pigeon and you put an atmo bov? what the hell?

I have a Trust TypeR BOV to atmo and it does the "pigeon" on low boost releases and a loud psst on high boost - the best of both worlds.

 

[j0nbubz]

I have a Trust TypeR BOV to atmo and it does the "pigeon" on low boost releases and a loud psst on high boost - the best of both worlds.

Same as me.. =) I much prefer the pidgeon all the time, but I don't really want a dead turbo any time soon =P

 

[Yakozan]

There are 2 differnet schools about the pidgeon killing turbos or not.
some claim that pidgeons will kill the turbo almost instantly while other claim that the damage will be so small that there is probobly something else that will kill it befoer the pidgeon does.

Here is a recent thread on gtr.co.uk regarding this matter.
I know there is alot of people running pidgeons on the SXOC.co.uk and has been for several years now without any problems.

http://www.gtr.co.uk/forum/upload/82141-does-compressor-surge-kill-turbos.html

 

[Nicely]

Pigeon isn't going to kill an S15 turbo instantly. It might kill a ceramic though.

The best options are BOV to atmosphere or recirculated BOV. The difference is the atmos will cause terrible jerkiness when lifting off at speed. Oh, and had the :ghey: sound

Running a recirculated BOV gives you the same smoothness as the OEM recirc, but doesn't have the boost leaking over 1 bar. You will also get some pigeon sound

Not all BOV can be recirced. You have to buy a specific type which can be fitted with a recirc adapter, eg. HKS SSQV or Racing 2.

 

[JEZ 8553]

So would this for example be fine to recirculate ...

http://82.110.105.84/apexperformanc...65&PHPSESSID=a30baaff1952bf9355d11900d825c5f4

I presume it includes everything to do so ?

Also is it only worth using a BOV to recirculate when upping boost over 1bar ? Is the Pigeon method in Nicely's guide fine for standard boost ?

 

[Nicely]

That kit looks to included the recirc adapter.

The standard recirc valve can cope with around 1 bar before it leaks. There is a mod you can do to it to sort the leak though. Pigeon is OK up to a bar. Back pressure will be quite a bit over that though. I have to say that I noticed turbo stall running full pigeon.

 

[ichi-go]

^^ Yep that one looks like it's recirculate.

There's no actual fact stating pigeons kill turbos so I would say if you are not running insane boost, you are pretty much safe.

The stock bov is good for about 1bar before it starts leaking so you only need to change it when you up the boost.


I-nearly-bought-a-batty,

You must be running alot of boost to be using that bov. Which version of Type R do you have? I heard they are black and silver housing? black 25psi spring and silver 30 psi spring.

 

[j0nbubz]

I have a Blitz DD atmo (no recirc available), however gear changes definitely feel smoother than previously (running a pigeon with no stock DV)

However, as nicely puts it, the sound is quite boring =).

My boost is stock at the moment, and will probably only go to 1bar max. I would assume it safe to go back to my pigeon?

 

[mint]

What does the s15 oem unit sound like?

 

[Yakozan]

What does the s15 oem unit sound like?

With a pod-filter it flutters

 

[moomin]

I was thinking about getting a re-circ DV, i was gonna go for the Sard R2D2, i also tried the "pigeon" mod, but, i no some of you guys are quite sceptical about this mod, and some are not, personally, the thought of air being forced back through my turbo doesn't fill me with confidence, but thats just me.
I got myself a apexi induction, and was nicely suprised that my standard nissan DV came to life!!.
Personally, i think dump valves sound a bit naff, and, for the money are a bit of a waste of money, i like the subtle sound that my standard one makes with the Apexi. i would prefer to spend my money on something that will have some noticable effect on my car!
but thats just my opinion.!
:wave:

 

[raytsang]

well to be honest the reason i use a DV is because im running high boost over 1 bar.... in recirc as i got tired of the high pitch sound

nothing wrong with standard DV if you plan to never run high boost.
no one can resist abit of boost

you only get problems when you do run high boost the standard Dv's they are known to leak over 1 bar of boost.

 

[j0nbubz]

Ive just bought a blitz bov recirculation flange kit.. will put this on and see what the difference is!!

hope it leans the a/f a bit!

 

[Nicely]

Though, there is a mod to stop the standard recirc from leaking. It was on the old NS.co.nz site, so fook knows where it is now....

 

[Topper]

j0nbubz - you should notice a difference, i noticed the car being smoother when swapping from a Blitz atmos bov to my HKS re-circ :thumbs: