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Old 13 December 2005 | 11:14 PM
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Question Can I disconnect my BOV??????

Can I disconnect my BOV completely on my Classic MY95 import with a TD05 currently running 285bhp.

I have heard this should be ok. Am I right....

Cheers

Dean
Old 13 December 2005 | 11:27 PM
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what is a bov?
Old 13 December 2005 | 11:31 PM
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Originally Posted by scarey
what is a bov?
Are you serious
Old 13 December 2005 | 11:32 PM
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blow-off valve
Old 13 December 2005 | 11:33 PM
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Originally Posted by scarey
blow-off valve

Thats the one
Old 13 December 2005 | 11:36 PM
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sorry brain not working due to nearly empty wine bottel here and the 1/10 scale merc slr r/c car sat in the front room waiting for the battery to charge!!

needless to say I can't help you with your technical question!
Old 13 December 2005 | 11:38 PM
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Old 13 December 2005 | 11:50 PM
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still charging
Old 14 December 2005 | 08:31 AM
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why would you want to disconnect it completely ? If you're sick of the pssttchhhh then just stick recirulating valve back on instead of vent to atmos.

There's lots of discussions about dump valves on here and I'm still tempted to stick one on coz I just like the sound but I'm 37 now - do I really need to be going "psssttcchhhhh burble psssttcchhhhh" ?

Are there any recircs you can get which are audible without changing to a full induction kit too ?

Martin
Old 14 December 2005 | 08:43 AM
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I havent got the old recirc valve just the hks thats on it. I do have the kit to make it recirculating but with the postioning of the valve I will need to connect about 5 foot of hose to get it back to the original bunged up pipe. If I just disconnect it, the hose of the bov will simply join back on to the old bunged up pipe, all I will need is a connector.

I dont think any of the recirc bov's make much of a noise. I think some you can just hear the valve shutting.
Old 14 December 2005 | 08:47 AM
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You can take it off but the turbo will stall every time you close the throttle. You could remove the efi as well and fit a sealed blow-through 38DGAS but why..........?
Old 14 December 2005 | 09:14 AM
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Ask flat4 the question. He's currently running his Sti RA with no dump valve at all.
Old 14 December 2005 | 10:02 AM
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Originally Posted by Bubba po
Ask flat4 the question. He's currently running his Sti RA with no dump valve at all.
Cheers Bubba Po. Just sent Flat4 PM.
Old 14 December 2005 | 10:05 AM
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Originally Posted by GC8
You can take it off but the turbo will stall every time you close the throttle. You could remove the efi as well and fit a sealed blow-through 38DGAS but why..........?
Just fed up with the noise to be honest. Dont have the original recirc one to put back and if I fit the recirc kit I have for the HKS one, I will need to fit loads and loads of hose to get it back to the bunged up original hose. Just thought it would be easier to get rid of the bov, aslong as it doesnt cause any damage.
Old 14 December 2005 | 10:15 AM
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It'll work but it will make a noise as the turbo stalls and air is forced past the compressor blades.


Simon
Old 14 December 2005 | 10:22 AM
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Originally Posted by GC8
It'll work but it will make a noise as the turbo stalls and air is forced past the compressor blades.


Simon
Is the noise quiter though than the vta. Ive just found another thread that says it shouldn't cause any damage aslong as I have the TD05, which I do.
Old 14 December 2005 | 10:28 AM
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How loud itll be I honestly dont know; its the same noise that youll hear from a GpA or WRC rally car when it changes gear (even though a number of supposedly knowledable 'tuners' tell people to fit a VTA blow off valve to "make the rally noise": *******!).


Simon
Old 14 December 2005 | 10:35 AM
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surely you cannot remove it completely?? when it was made they put one on it, I guess for a reason.

I discovered what happens recently if theres just a small amount of air introduced into the system, as simon will confirm removing the bov will surely make your car stall all the time?

even if you do have to put loads of pipe in, it will only be as much as was in it when it was first made?
Old 14 December 2005 | 10:40 AM
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I ran for about 10,000 miles without a dump valve on a td05, excellent fun and the MHI units are tough little buggers.

sounds like a fanny fart on compressor stall, but sounds a whoile lot better than the dump from vta and even from recirc.

go for it!
Old 14 December 2005 | 10:40 AM
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Originally Posted by GC8
How loud itll be I honestly dont know; its the same noise that youll hear from a GpA or WRC rally car when it changes gear (even though a number of supposedly knowledable 'tuners' tell people to fit a VTA blow off valve to "make the rally noise": *******!).


Simon
Cheers for the help mate Just want to double check with you before I disconnect it. The bunged up hose is coming off the large inlet hose along from the MAF.
See in the picture just below the hose with the gold pipe that goes to the bov. This is the one I just simply need to join to the one coming from the gold bov pipe.

Old 14 December 2005 | 10:41 AM
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you would need to bung the pipework mind from where you took the dump valve off
Old 14 December 2005 | 10:42 AM
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Originally Posted by Peanuts
I ran for about 10,000 miles without a dump valve on a td05, excellent fun and the MHI units are tough little buggers.

sounds like a fanny fart on compressor stall, but sounds a whoile lot better than the dump from vta and even from recirc.

go for it!
Cheers mate Ill have a play at the weekend
Old 14 December 2005 | 10:42 AM
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That was an induction air leak James. When you remove the blow off valve the car will run perfectly well. When you close the throttle the turbo continues to spin pressurising the inlet; when youve removed the blow off valve the pressurised air cant escape so it stalls the turbo.

Whats that white mark on your shoulder?


Old 14 December 2005 | 10:47 AM
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Originally Posted by Peanuts
you would need to bung the pipework mind from where you took the dump valve off
I just thought yes the little hose that goes to the top of the inlet manifold to the bottom of the bov. Is this the one I will just need to block off. The second large hose just connects back to the inlet pipe from the old recirc valve doesnt it.

Or do I just need to block both the hoses from the bov and leave the original recirc hose bunged up on the inlet pipe?????
Old 14 December 2005 | 10:48 AM
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Will this also work on a TD04?

Is there any benefit?
Old 14 December 2005 | 10:51 AM
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the small hose to the manifold can be cut as a short stub and just drive a slightly bigger screw into it.
The recirc line back to the inlet pipe/maf should be bunged up already if your running a vta, the other is the connection into the DV, if 99 onwards then its a flanged plate to block the intercooler or if its earlier then you need to bung the hose that runs into the DV.

basically in OE form there are three hoses to/from the recirc DV, make sure all three are bunged up good and tight.
Old 14 December 2005 | 10:59 AM
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Originally Posted by EddScott
Will this also work on a TD04?

Is there any benefit?
No there's no benefit; the benefit comes from fitting a relief valve to release the pressure and stop the turbo from stalling.....
Old 14 December 2005 | 10:59 AM
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Originally Posted by Peanuts
the small hose to the manifold can be cut as a short stub and just drive a slightly bigger screw into it.
The recirc line back to the inlet pipe/maf should be bunged up already if your running a vta, the other is the connection into the DV, if 99 onwards then its a flanged plate to block the intercooler or if its earlier then you need to bung the hose that runs into the DV.

basically in OE form there are three hoses to/from the recirc DV, make sure all three are bunged up good and tight.
Cheers mate. Yes its a MY95 I already have the recirc pipe bunged so I will just need to block the large and small pipes off the BOV.
Old 14 December 2005 | 11:02 AM
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Originally Posted by GC8
No there's no benefit; the benefit comes from fitting a relief valve to release the pressure and stop the turbo from stalling.....
Then why do it? Not being funny but if theres no benefit why risk damaging the turbo by removing the DV?

"Why bother he says when he spent £200 on a DV that does naff all"

(I mean me BTW )
Old 14 December 2005 | 11:07 AM
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I cant answer that; I wouldnt do it myself.


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