[LJZ]

Im currently installing a new Drift supersonic/plumb back BOV to my supra (im doing it atmosperic) and need to know if there are any issues with keeping the stock BOV attached and working.

I am installing a T piece to the hose that feeds the stock BOV and feeding that down the the Drift BOV on the cold side of the intercooler.
Looking over the internet most people take off the stock BOV and cap the ends with rubber stoppers and hose clamps. But I want to keep mine on so that the engine bay still looks OEM as possible, it really sticks out with the stock BOV missing.
So the question is.

Keep the stock BOV?
Or pull it off and block the hoses leading in and out of it with grommets and making sure its air tight???

Also if anyone has done this, what did you block the hoses with??

Cheers guys

[IcE]

So, your wanting to run two BOVs?

Uhm....

[LJZ]

I just wanted to know if you could have a aftermarket BOV and keep the stock one working at the same time. It means less work for me.
But if this is going to be a problem then I will block off the stock one

[ma61turbo]

LJZ, on 08 February 2011 - 04:58 PM, said:

Looking over the internet most people take off the stock BOV and cap the ends with rubber stoppers and hose clamps. But I want to keep mine on so that the engine bay still looks OEM as possible, it really sticks out with the stock BOV missing.

Your installing a large atmospheric BOV with a big horn on it(if the pictures I found via Google are right), and you're worried about the obviousness of the stock one being missing??? :blink: :crazy:

Better off removing it and blocking off the ports.

Most ideal option would be to uninstall your cops-looks-at-me super-loud pointless BOV and run the stock one, but I don't think you'll take that one...

[IcE]

Well, you can.

But why dont you just replace the stock one with the aftermarket one? Not being an A80 owner, im not sure how the plumbing side of it works, but, i would imagine it wouldn't be too hard to do?

[ma61turbo]

IcE, on 08 February 2011 - 09:11 PM, said:

Well, you can.

But why dont you just replace the stock one with the aftermarket one? Not being an A80 owner, im not sure how the plumbing side of it works, but, i would imagine it wouldn't be too hard to do?

Pretty much exactly the same as the BOV on the 7m. To replace the old with the new you'd need to get adaptors made up though, and there really isn't any room for anything much bigger in the stock location. I had issues getting my Bosch BOV(not stupid loud or atmospheric and looks stock) to fit and that isn't much bigger.

[LJZ]

ma61turbo, on 08 February 2011 - 09:11 PM, said:

Your installing a large atmospheric BOV with a big horn on it(if the pictures I found via Google are right), and you're worried about the obviousness of the stock one being missing??? :blink: :crazy:

The logic for my craziness :crazy: haha was that perhaps if the pol pol pulled me over, maybe not for hearing the massive aftermarket BOV that if they looked under the bonnet quickly they wouldn't imidiatly turn their attention the the missing stock BOV. By keeping it there atleast things "look" as they should be.
But yes your right as soon as i boost off their ear drums will shatter and bam gone :whip:

I think im going to go with blocking the inside of the pipes off with a plastic bearing just bigger than the tube.

[LJZ]

Okay so installed the BOV, now im trying to work out how to set the thing right.
There is arrows ontop of the BOV, Hard and Soft. depending on which was you tighten it.
From what I have read this tightens and loosens the spring inside allowing it to either open on stay closed... i think.
Anyways what I went for the first boost I can hear the BOV go off but only if im reving upto around 5g, this is the same when its in my shed and im reving it from under the bonnet.
Anything under 5 G and the BOV doesn't open at all and I get a big turbo flutter, is this bad for the engine?? I have a feeling it is and am a little worried.
Any idea's on how I should set this thing. at the moment I have got it closer to Hard but am thinking of just backing it off all the way to soft

[Yiros]

Why does one need to remove the stock BOV if they only want to block it off?

You can simply block the stock BOV off but still leave it installed. That's what I did anyway!

[LJZ]

Yiros, on 10 February 2011 - 09:26 PM, said:

Why does one need to remove the stock BOV if they only want to block it off?

You can simply block the stock BOV off but still leave it installed. That's what I did anyway!

I have left it on and blocked it as you did. Only thing is when I took the hose off to add the T piece because the rubber is so old it cracked. Now I just have the vacume hose hooked streight onto the metal piping rather than running through a T.
Not sure what to do becuase the BOV is on its softest setting but will only open after i get over 5g. anything under and it just flutters back through the turbos and out the intake!!! not good

[IcE]

What happens when your acctually giving it a boot full? Say, 3rd gear, full boost (im assuming it be around the 3k mark yes?) Does it go off then?

It might just be a case of not enough boost coming through the intake to set it off? Have you tried turning the 'knob' the other way to see what happens?

[LJZ]

still wont go off. If i take off from stand still giving it everything she has got and change at 3 or 4 all i get is flutter and the BOV remains shut, not even a hint of opening. Also when it finaly does open its a very very quick wooshh of air then closed again.
I pulled it apart and the piston seemed to move up and down freely so its not getting jammed.
I have tried the knob from all the way Hard to all the way Soft and everywhere inbetween and cant seem to make any difference.

The only thing that I can think of is that the vacume line is too long to pull air through. its 3 metres.
The only reason is that my intercooling piping has the BOV fitting on the cold side of the FMIC so its pretty much the furthest point from the vacume hose line that used to feed the stock BOV. perhaps loosing vacume over the distance therefor only just opening the new BOV and for a shorter time??

If this is the case what would be a good solution, is there another point I can tap into the vacume line closer? use a bigger hose?

[ma61turbo]

LJZ, on 11 February 2011 - 06:25 AM, said:

still wont go off. If i take off from stand still giving it everything she has got and change at 3 or 4 all i get is flutter and the BOV remains shut, not even a hint of opening. Also when it finaly does open its a very very quick wooshh of air then closed again.
I pulled it apart and the piston seemed to move up and down freely so its not getting jammed.
I have tried the knob from all the way Hard to all the way Soft and everywhere inbetween and cant seem to make any difference.

The only thing that I can think of is that the vacume line is too long to pull air through. its 3 metres.
The only reason is that my intercooling piping has the BOV fitting on the cold side of the FMIC so its pretty much the furthest point from the vacume hose line that used to feed the stock BOV. perhaps loosing vacume over the distance therefor only just opening the new BOV and for a shorter time??

If this is the case what would be a good solution, is there another point I can tap into the vacume line closer? use a bigger hose?

I suppose that's cheap shitty BOVs for you...

FWIW the VL turbo guys actually pay money to get the sound you want to get rid of. Idiots.

Try unblocking the stock BOV and see if that helps with anything, that may allow you to run the uber-loud BOV without risk of killing your turbos(although it is unlikely that the turbos will die with what is happening it is still a risk).

[PHANTOM]

ma61turbo, on 11 February 2011 - 07:51 AM, said:

FWIW the VL turbo guys actually pay money to get the sound you want to get rid of. Idiots.

Dose pipes HAHA

its strange people are installing Blow off valves that arent plumb back. i thought the current trend for street vehicles was have them but make it legal. or just leave it stock so u get the flutter noise as you can be defected for that unless suspicion...

turbo cars...who wants one :P

[Darren]

My Plumb back HKS is just as noisy as the Atmo one I used to have yet legal.

turbo cars... who wants one ?..................hmmmmm ME :crazy:

[LJZ]

thanks for the imput guys haha :cheers:

Yes yes i know, plumb back is probably the way to go and I did get a BOV that can take off the trumpet and put the vented air back into the intake but for now I just want to have a little fun with the wooshing.
Always makes me smile and I will probably revert to plumb back after I get sick of it.

I solved the problem anyways.
I called Brenton from Fours n More and discussed the issue with him.
We came to the conclusing that the vacume hose I used which was the boostlogic 3mm x 3m hose was either too small or colapsing under high preasure and not allowing the BOV to open. So this morning I removed the boost logic hose and replaced it with some 5mm fuel hose I bought from the local hardware store.
Works a treat now.

Thanks to everyone that had imput in trying to work out my rather silly problem.

TURBO'S RULE :rock:

[Darren]

I was wondering about the vacuum line when you said how long it was. I upgraded all mine with silicon and have had no issues since :)

[LJZ]

All good darren, you were onto the money there. no issues now