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WG signal is a "boost" level signal that should come off close to the outlet of the compressor and the BOV is a "vacuum" signal that should come from below the butterfly.
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Steve
Sapere aude
1983 3.4L 911SC turbo. Sold
Old 05-16-2011, 07:23 AM
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You mix-up something here:

Diagramm does not show WG before IC

BOV connection is from the Throttle body left (below plate), so the BOV stays open when big vacuum present at manifold at closed throttle

WG connection is from IC, port is on the left front at the 965 IC, beside the gauge sensor (big red one), should be close to the throttle body
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Roland

930 Turbo '81 Too many modifications to list
Old 05-16-2011, 08:00 AM
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Thanks Roland.
I will post some pics tonight of the ports I have available.


I did a little research on the TurboXS BOV I have and it looks like it is one of those which vents to the atmospehere ( I will post a pic of that too).

Because i really dont want to hear, pssssssst or any other Fast and Furious sounds, I may just switch to the 965 elbow and BOV.
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-16-2011, 09:36 AM
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Quote:
Originally Posted by jcc911 View Post
I did a little research on the TurboXS BOV I have and it looks like it is one of those which vents to the atmospehere
You still got CIS, then you cannot use a BOV like this, because the air circulating is measured already. If you vent it, then new air will enter and CIS don't stop injecting fuel. It's not what you want at this moment...
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Roland

930 Turbo '81 Too many modifications to list
Old 05-16-2011, 01:46 PM
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Quote:
You still got CIS, then you cannot use a BOV like this, because the air circulating is measured already. If you vent it, then new air will enter and CIS don't stop injecting fuel. It's not what you want at this moment...
That is what I thought, I will source the Bosch version then.

Here are a few pics of the ports I have on the IC.




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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-16-2011, 03:12 PM
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The plugged one in the middle is for the boost gauge sensor (big red rubber), on the left of it, it's the safety switch for overboost, I think 1.3bar, should be written on it

I would use the 90 elbow on the right for WG. Switch on the left
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Roland

930 Turbo '81 Too many modifications to list
Old 05-16-2011, 03:21 PM
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Thanks that is what I was thinking too.
What type of hose connects the IC to the BOV? Hopefully I can find a hose to connect that large port to the 965 BOV.
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-16-2011, 03:27 PM
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Hose is some low pressure(5-10bar) hydraulic/fuel hose for example. Something with reinforcements. Every hydraulic shop should carry them. Do not use high pressure hose, they are way to stiff and you would not get it over the flanges.
Inner dia. is 25mm

you asked for brackets for IC too:

You can you both, aluminium or stainless. What you prefer. I used Stainless for the bracket on fan, because the most weight/load is there. For the other two I used 20x4 aluminium. I highly recommend to use rubber mounts all around because of the vibrations or the brackets will break for sure
You can look into hosts parts catalogue for 965 IC, how the rubber bearings look like.
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Roland

930 Turbo '81 Too many modifications to list

Last edited by proffighter; 05-16-2011 at 11:47 PM.. Reason: more text
Old 05-16-2011, 11:38 PM
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Thanks again Roland.
I havent see what the diameter differences are yet between the Bosh and the flange on the IC, but if they are different, if it possbile to clamp down this type of hose?

PS Check your email.
Thanks
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-17-2011, 05:11 AM
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It depends on the difference, a few mm for sure. But I wonder they are different, because a stock 965-BOV should fit to a 965-IC without issue
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Roland

930 Turbo '81 Too many modifications to list
Old 05-17-2011, 05:29 AM
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I guess I will not know until the stock BOV arrives. It seems that the flange that was welded on the IC for the TurboXS BOV is quite large.
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-17-2011, 05:31 AM
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Added the 965 Elbow and the Bosch BOV (Thanks Todd). As can see, the OD of the oem BOV is just slightly smaller than the ID of the TurboXS flange. Hope fully I find a suitable hose to tie them together.
So that also means I have an extra 965 elbow and stock 930 elbow now....

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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport

Last edited by jcc911; 05-21-2011 at 06:13 AM..
Old 05-21-2011, 06:08 AM
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PS take a look at how the IC is stilling on the TB.

I am not sure how "tight" the seal is supposed to be or if it just sits on there.
Should it seat all the way down? I will be fabricating my brackets today as well.

Later.
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-21-2011, 06:11 AM
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Ideally I wonder if the other BOV could be removed, but I would not want to damage the IC, as that flange was slid over/welded to the factory port.
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-21-2011, 06:14 AM
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Quote:
Originally Posted by jcc911 View Post
Ideally I wonder if the other BOV could be removed, but I would not want to damage the IC, as that flange was slid over/welded to the factory port.
I think you can cut carefully the tube until the stock as it's only welded in the back end. Use only a hand cutting tool, the you can see when you reach the inner one
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Roland

930 Turbo '81 Too many modifications to list
Old 05-22-2011, 08:49 AM
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I actually went ahead and cut most of the BOV flange off and much to my dismay, what I found was another tube which was slid in and not secure. Kinda tough to explain. Here is a pic. Hopefully this piece or different piece can be welded on so I have a place to attach the new BOV hose.


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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-22-2011, 09:34 AM
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JB weld would work well. I think this would be a good application for it.
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Old 05-22-2011, 02:23 PM
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Quote:
Originally Posted by ben parrish View Post
JB weld would work well. I think this would be a good application for it.
Good solution if no welder is available
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Roland

930 Turbo '81 Too many modifications to list
Old 05-22-2011, 04:29 PM
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Thanks for the tips!

OK there has been discussion regarding the little K&N filter I have on the AAR. I understand the filter has to be removed and the AAR connected to the IC. As you can see in a few pics there are a few locations where there are "plugs" screwed into the IC and there happens to be one on the pass side where I could connect the AAR to, I just need to figure out the size/threads of the plug so I could screw in some sort of "nipple" to connect a hose to.


More progress today, Should only be a few weeks away from starting up, fingers crossed.
But I still do have to come up with some idea for the charge pipe.
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-22-2011, 05:47 PM
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Does any one have a pic as to where the hoses go that are connected to the stock airbox? I know the small one goes to the WUR, but what about the two large ones.
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Jeremy C.
Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham)
----Nothing is far away in this car!----
-1978 911 SC TURBO, Minerva Blue Targa 965 update.
-2008 550i M-Sport
Old 05-22-2011, 06:39 PM
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