930 CIS Questions

[jcc911]

I have a couple of questions regarding my "new to me" 930 CIS system.

1) In front of the recirc manifold I have two holes, A large one centrally located and the other off to the left. I am guessing the center one is for the Red Boost transmitter.
What is the other one for?

2) One rear of the recirc manifold one the drivers side there is a switch with an spade type electrical connection. What is this for?

Thanks, Jeremy

[jcc911]

No one has any ideas?? Come on.
I circles the holes, thanks.

[proffighter]

Ok, the middle one is for the boost gauge sensor and the other one for the boost limit sensor, which shut-off the fuel pumps when some like 1.3bar reached

[RarlyL8]

Pictures are a good thing.

The circle to the right of the decel valve is for the (red) boost pressure sending unit.
The circle to the left of the decel valve is for a vac port that connects several devices including a T from the distributor.
The spade plug in the rear you asked about is the over-boost sending unit.
There are variations of the smog equipment connections but if that has been removed it doesn't matter. I'm sure there is an exploded diagram somewhere that would be more help.

[jcc911]

Thanks Brian.

I may be switching to a 965 I/C, so I would be pulling off that manifold.
If I dont, I do not have any smog parts, so would I just plug the hole?

Not sure what I am doing for the boos gauge just yet, but may still source the pressure sending unit.

[proffighter]

Switching to an 965 IC and therefore its BOV would be a huge improvement, highly recommended by me

BTW: Do you guys get up that early everyday? It's about 7:00 AM in the US, no?

[JFairman]

You can put a plug in the left hole. I sold that annoying old blow off manifold a long time ago and put in a long neck intercooler. It is an '87 and I think it had a plug threaded in there when I got the car used.

The best and easiest way to hook up a mechanical boost gauge where the clock goes is T into the short rubber hose in the front trunk that goes from the bottom of the brake booster to the steel fitting in the trunk floor next to it.
An inexpensive section of hose like carburator fuel line about 2 feet long will go from there and up behind the dash and to the area behind the clock easily.

I used a straightened out coat hanger and snaked it in through the clock hole until the end of it was next to the brake booster hose in the trunk. Then masking taped the hose I put in for the boost gauge to it and pulled it over to the clock hole from inside the car... easy.

You can remove the speedometer to have a bigger hole in the dash for more access if you want. Once the clock is out you can reach in and push the speedometer out from behind.

[fredmeister]

I use the small threaded hole on the left for my wastegate boost line.
My reasons are 2 fold: It is after the intercooler which accounts for the small pressure drop thru the cooler that you normally would see if you ran the boost line from the inlet end tank on the intercooler as is common practice. Gives a little more boost to the system.
Second is you dont collect oil from the intercooler into the boost line and ultimately the wastegate housing since the normal fitting on the intercooler is at a low point that collects any blow by oil inside the intercooler end tanks.

[RarlyL8]

I would ditch the electric boost gage as well, junk. Get a mechanical gage and sleep easy.
My mechanical gage takes the signal from the hole where the electrical sending unit used to screw in. Waste gate uses the other hole you circled. Same reason Fred cited, I don't want oil in the passages. I opened up a client's waste gate just last week and oil poured out. He had it hooked up to the intercooler which just dumps oil down the hole.

[krasuskyp]

Hmmmm, mine's hooked up that way of course.

Can someone please post a pic of what fitting is required to tap that port for the boost line to mount there, and suggested source?

And here I thought oil in the WG would be a good thing to keep it from seizing (BTDT) heh heh...

[jcc911]

I think my time setting is off a bit as I am on Central Std Time, however when you are "workin for the man" you have to get up early, or at least I do (530 am).

OK I will probably go the 965 IC route. That means I will ditch the recirc manifold, but I will need a new up/charge pipe, correct?
Alos what are all of the ports on the IC for?

Also I am going to be using my SC dizzy at first, where do I hook up the vac line for the pod?

[jcc911]

OK so I removed recirc valve in preparation of the larger intercooler.

1) What do I do with the vac line that was connected to the decel (?) valve

2) What about these two ports also once connected buy hoses?

3) How does the IC connect to the TB? Silicone coupler?

[proffighter]

Small hose on top can be used for BOV, need vac line too

I removed the lower aluminium tube and pressed an alu bush in, which I threaded to mount my pressure sensor

965 IC will be directly mounted on the TB because it has a long neck

Look at my thread, there you find some pics similar to 965 IC, mine is a B6:

Another EFI conversion

[jcc911]

Roland. Pm me your email and I'll send pics of the fitting. Thanks