Backdating '76 930 to original non-intercooled setup, what should I change?

[ivanuf]

Originally Posted by stevie 77 930

Here is a picture of an early intake manifold. I tried to mark vacuum hoses, its not great, but here you go.

Hose #1 large diameter hose for brake booster

Fitting # 2 Hose attachment to BOV hose is about 8'' long and is routed under
the manifold

Fitting #3 short hose to Vacuum limiter goldish canister

Hose # 4 vacuum to distributor pod

Hose # 5 to wastegate

Fitting # 6 vacuum line to vacuum limter nipple on the front

One question on this old topic, I am in the process of doing the same work and do not see where into the wastegate #5 will go.

The wastegate has a lower hose that as I undestand goes before the intake into the intake tube, and the upper port as I understand vents to the air.

Any pictures of this connection?

Thanks
Ivan

[stevie 77 930]

as pictured # 5 hose goes to wastegate lower line. As you state the top of the wastegate vents to air

[ivanuf]

Stevie

Can you post some pictures of that engine all around?

It will be great reference

Ivan

[stevie 77 930]

[G60SuperCharger]

Wow that is some engine porn right there! Gorgeous work Steve!

This thread bump brings back a lot of memories. Although I sold my Euro '76 930 non-sunroof for a lot of money 3 years ago, I sure do miss it.

More pics: https://goo.gl/photos/g8KBjKuWovTaT6cs9

[ivanuf]

Thanks stevie, great information. I might be sending you some more questions if you don't mind. I am in the process of doing the engine work.

I am not doing a 100% back to stock. I kept the headers, and left the air pump out for now and I am still debating on the need to add the stock BOV.

[stevie 77 930]

The stock BOV works perfectly well and i wouldn't delete it. As you know it integrated into the up and down pipes. If you are referring to the decel valve, that too, when woking correctly serves a good purpose. Here in California, without the air pump and EGR, i wouldn't pass the visual smog test, but I do get by with W-pipes vs thermos.
Your engine is looking good !

[ivanuf]

I am not doing the emissions parts for now. I will problably gather the parts over time just to have them but I do not need them for my inspections.

What I am referring to is the part circled on the picture below. I do not have it, don't know what it does and not sure If I get one how will I install the hoses if the car does not have the emission components. I refer to it as BOV, but not sure if accurate.

All turbo carreras I have seen are not using it, some have it delete ans some are just sitting there.

Any suggestions?

[stevie 77 930]

What have " circled" is the control valve and what you " X" is the diverter valve. You are correct, not needed if you are not using the air injection system.

In case you want to know what these do:
The control valve is boost activated and measures a certain amount of pressure and then sends that pressure to the diverter valve, opening the diverter valve to divert air away from air injection system during boost conditions.

[Les Paul]

I have those parts somewhere in my garage.

[G60SuperCharger]

This info is gold, thanks again so much Steve!