Pipe Name

[stranger12]

Hi ,

What are the two pipes that get out of this pipe and one is blocked off and one connected to the oil vapour feed on the rocker cover

http://m.ebay.com.au/itm/181717607253?nav=SEARCH

[GTSBoy]

The big ugly black one is the turbo intake. The larger of the two metal ones is the BOV return. The smaller of the two metal ones is the engine breather - part of the overall breather system though, not just the one pipe in that system.

[stranger12]

Cool know the black one but wasn't sure about the breather and bov return

Mine has a blitz bov or dump valve close to the throttle plate, is that not standard or bov comes with these cars ?

The return pipe is blanked off so guess it may be it was used and not it no longer it ??

Can you block both of those pipes and remove them ?

Mine has a bov or dump valve on the

[GTSBoy]

Atmo BOVs are shit.

[Trex]

Atmo BOVs are shit hot.

No they aren't.

[stranger12]

So does r34 have bov from manufacture ?

If so is it the one just before the throttle plate as mine was changed to blitz

If above is correct thej why do they have the turbo return pipe close to intake which is blocked off? Can one buy a silicone and remove that 2 pipe ( metal ones?)

[GTSBoy]

Yes, they do have a recirculating BOV from factory. Put it all back the way it was (is the best advice we can give you).

[scotty nm35]

The BOV return needs to be close to the turbo inlet to stop reversion. They blocked it off so the turbo doesn't suck unfiltered air once the atmo BOV was fitted.

Silicone intakes are bloody stupid if that's what you mean, they suck shut when they get hot as the turbo generates a lot of vacuum.

[stranger12]

I am failing to understand the point of it

If it is close to intake and the air returns when throttle is closed, the box close to throttle plate releases that air so what is this for ?

Even if air goes there it is trapped, right?

I am sorry if this sounds stupid but don't get it

Curious as to how it works

[GTSBoy]

The factory BOV releases trapped pressure in the intake and releases it in front of the turbo so it goes around and around. But this aspect of the functionality doesn't really matter, because the reality of the situation is that the factory BOV is not really a BOV. Calling it a BOV is a lazy shorthand. It is really a compressor bypass valve, and what it does it it opens when the engine is under vacuum to allow air to flow direct from the inlet to the engine without having to pass through the turbo. Thus unloading the turbo and allowing it to spool faster.

Simples.

[stranger12]

many thanks for this, by bov or dump valve , we are refering to the the dump just before throttle plate ?

Mine has blitz installed.

and return bov being the one next to the turbo intake which has a dead end ?

[75coupe]

We may need colourful diagrams for this one...

[GTSBoy]

Your Blitz BOV is located EXACTLY where the original factory one was. The original factory one's outlet was connected to that larger metal pipe that connected at its other end to the turbo inlet pipe.

[stranger12]

So that means since i have aftermarket bov, i can remove my blocked pipe , right?

[GTSBoy]

Or, you could listen to advice to f**k off the aftermarket BOV and put it back the way it should be.

[Ben C34]

Do what you wanna do be who you wanna be yeah......

[stranger12]

I DONT have the after original one mate, have bought it this way hence question.

No need to get arse

[Ben C34]

I DONT have the after original one mate, have bought it this way hence question.

No need to get arse

They AREN'T impossible to get.

No need to be anger

[GTSBoy]

I DONT have the after original one mate, have bought it this way hence question.

No need to get arse

I didn't have a GTR one when I wanted to try one on my RB25.....so I bought one.

[stranger12]

ok , I have been reading around and know why people are saying to put the original or at least recirculating valve back but i love the sound of the blow off

I know this means richer engine but how much ?

if I want to keep maf , can i relocate maf close to intake or is that silly idea? no one has ever done this and my question would be why not just relocate it ?

sorry if this sounds daft but not sure really

Edited April 30, 2015 by stranger12