Stinky needs a little help with wiring!

[FrayAdjacent911]

As some of you may have been following, I've been fixing up Stinky to get her driveable. I got the title in the mail, and Monday I go to get her plates. The gas tank is almost ready to go in, after the undercoating dries and I replace the soft lines. The engine is in, the carbs are on, the seats are in, the steering wheel is swapped...

All I really really need to do is wire up the engine bay. I've been looking at a few wiring diagrams, and I'm still having a little trouble.

I've figured out what wires go to the thermostat and pressure sender... but what connects to the device that's on the breather housing? (and what is it??)

Anyone with a 69T got any description on what wires go where? (with the stock ignition?)

TIA for the help getting Stinky running! Next weekend might be the inaugral drive around the block.

[911pcars]

"but what connects to the device that's on the breather housing? (and what is it??)"

69T was the only year and model for the idle compensator. It's an emission device to slow down throttle closing during decel. You can leave it disconnected for now (or forever if desired).

Here are some early wiring diagrams.
http://members.rennlist.org/911pcars/WiringDiag.htm

If you have specific wire questions, can you shoot some digital pics? Will try to assist.

Sherwood

[304065]

[FrayAdjacent911]

Sherwood, thanks! The engine is out of a '70T, but I'll leave it disconnected and see how it does.

John, the second diagram is nice! Some things will be similar to the first, I know, so I'll refer to it.

I'm about to go down and do some work on the car. I'll get some pictures of the engine bay and write up a description of what wires are where.

I greatly appreciate the help! Hopefully I'll get it all squared away real quick!

[FrayAdjacent911]

Ok, here's some pictures I took today.


This shows the following wires from the back of the engine bay:
Blue
Green/black
Green
black/purple

I know the green/black goes to the thermostat, according to one wiring diagram. The diagram also shows a black/red wire going to the oil pressure sender. There is no black/red wire at the back of the engine bay.

Also from the side coming around to the back is this connector, with a black and a brown wire:


From the back left of the engine bay, these wires come:

There are three wires there, a white wire (see the next picture), a red wire, and a black with purple stripe.

The white wire originates from this splice:


And from what I've been able to see:


And the 69's alternator wiring harness:
(the end that connects to the alt)


(the end that connects to the regulator)


Here's the alternator out of the '70. The connector from the '70's harness only had two wires in the connector, connected to DF and D-.


Here's the end of the '70's harness that connected to the alt:


I simply popped the wires out of the connectors and swapped them. Here's the 69 harness at the alternator end:



Now I need to figure out what connects where!

Specific issues are:

Which wires connect to the coil?
Where do the green, and black/purple wires from the back go?
Where does the black and brown wire connector from the second picture go?
Where do the wires at the regulator side of the alternator harness connect?

Again, thank you greatly for the assistance. It would be very difficult to figure this all out on my own, and I'm SO greatful to have a resource like this to ask for help!

[FrayAdjacent911]

Bump for the morning...

[911pcars]

Here's a couple of pics. My ignition is converted and wrapped in a harness so I can't verify which are the coil wires.

Hope this helps somewhat.
Sherwood

[HawgRyder]

The long green wire comes to the back (fan end) of the engine just to the right of the fan and to a sensor in the right side chain cover.
I believe it is another oil temp sensor (in my 69S).
The oil sensor at the front of the engine sticking up next to the breather assy is for the oil pressure guage.
Bob

[FrayAdjacent911]

Sherwood, looks like the black and brown wire connect to some sort of vacuum deal... Is that on the Weber carbs? My engine has Zeniths, and there's nothing like that.

Bob, roger, long green wire to back right chain tensioner cover. I can't remember if my engine had a connector there. I'll have to look when I'm down there next weekend.

[911pcars]

Matt,
As per my earlier message, the vacuum throttle compensator is 69T only. I forgot you have a 70 engine in a 69 chassis. If you have some extra wires, that's were they would go.

Sherwood

[FrayAdjacent911]

Sherwood, yeah, that's definitely not there on my car. I'll just use some electrical tape to insulate the connectors and then put the wire out of the way.

The question is, what is the little doohickey that is actually on the breather cover? It has two connections on it, like two wires should connect to it. See the pics above... you can see it sticking up next to where the hose connects.


The most important connections are the alternator, and the ignition/coil wires.

[jpnovak]

Matt, the vacuum throttle compensator is used to advance the idle speed on the car. It was tied into the AC system on Stinky. I think it works via the drop in vacuum (and idle speed) with the compressor kicks on. There was a short arm that connected to the cross bar of the carbs. The vacuum canister would push on the arm and increase the idle. YOu will not need it on the car but I think it is still in a box if you want it. I am not sure if the electrical signal came from the compressor trigger wire (from evaporator) or somewhere else. Maybe Sherwood can help here.

[FrayAdjacent911]

Yeah, Jamie, I'll leave that out, I don't think I'll need it. Besides, that popping backfire through the exhaust is just so entertaining!

I just need to figure out the ignition so I can get the engine running!

[911pcars]

Originally posted by jpnovak
Matt, the vacuum throttle compensator is used to advance the idle speed on the car. It was tied into the AC system on Stinky. I think it works via the drop in vacuum (and idle speed) with the compressor kicks on. There was a short arm that connected to the cross bar of the carbs. The vacuum canister would push on the arm and increase the idle. YOu will not need it on the car but I think it is still in a box if you want it. I am not sure if the electrical signal came from the compressor trigger wire (from evaporator) or somewhere else. Maybe Sherwood can help here.

Jamie,
The official name is a "throttle valve compensator. It was an interim emission device to slow down throttle closure during decel (reduces vacuum, thus reducing fuel drawn into the engine). It received a signal from a RPM transducer (speed switch) that energized the compensator between 2000 and 3000 rpm. The speed switch is the box to the right of the voltage regulator in my pic above.

A similar dashpot was also used earlier in '68.

Hope this helps

[jpnovak]

Thanks Sherwood. I did not realize it was emissions related. I found a wire that went (incorrectly?) to the AC so I thought it was an advance for when the compressor kicked on. Always good to learn something new.

[FrayAdjacent911]

Jamie, someone could have rigged it up that way. I think most vehicles will have some sort of idle compensation when the AC compressor kicks on.