boost control query

[Alan L]

OK - this should be simple. But it is doing my head in.
I am in the process of swapping my EBC out for a dial a death knob. The EBC works fine - but is an electronic aid which did not belong to the era of the car. I am making it period correct.
But there are no instructions with this thing and UTube doesn't seem to be helping.
Any clues as to which bit goes where. The T piece seems to be a check valve. Somewhere I am supposed to get the top and bottom port of the WG hooked in to this thing and Teed off to the boost signal.
I have had several test runs of different configurations - while the engine is out, and none seem to work.
Thanks
Alan

[1Bad86]

I installed one on my piece last year and made a diagram for future reference.
It isn't the same brand but in theory it should work for you.
I'll snap a picture and post it for you in the morning.

[Alan L]

Thanks. I think the arrowed port on the controller goes to the lower port of the WG, with the T piece in between - arrow to WG. I am thinking the boost signal goes to top of T piece. Top port of WG goes to top port on controller. But that is a guess. Can't seem to get any configuration to work.
Regards
Alan

[1Bad86]

Here's my highly technical schematic.
I hope it helps!
I have a better colorized version at home.
This just happened to be saved to my phone.
I'm a 3rd shift vampire so I can update in the morning.

[Alan L]

Thanks - so does your T have some functional property, or is it just a T? Your label says Vac T
Mine has a sticker on the bottom which says 'Arrow points towards WG actuator'
Alan

[1Bad86]

Yes mine is just a general 3 way brass "T".
Wg actuator may be the side port on your Wg.
I'm running a Tial and have the paperwork including diagram at the house. I'll snap a picture of it later as well.

This is my in car set up.
I'll throw in a few other pictures later of how I set it up.
My engineering genius has no limits...

[Alan L]

Where did you route the hoses thru?
Trying not to go drilling holes in the body shell.
Alan

[1Bad86]

Originally Posted by Alan L

Where did you route the hoses thru?
Trying not to go drilling holes in the body shell.
Alan

That's an excellent question,

Many moons ago I notched the trans linkage cover plate to run the wiring for the first LM-1 (yeah these tend to stop working but ...)wide band sensor.
I passed the wires through the tunnel right next to the transmission linkage.

I originally planned to just follow the same path as the wide band wiring but when I removed the cover I noticed 2 cloth braided vacuum hoses passing through the trans tunnel.

Hmm where do these go?
I got under the car and noticed the 2 ends of the hoses were hacked off just past where they exited the trans tunnel.

I then got back into the car and gently pulled on the lines toward the front of the car and they both came right out apparently not hooked to anything.

The body shell has 2 perfect size holes punched right where they needed to be.

My thought is the hoses were a vent from the fuel tank to the charcoal canister or something but that stuff is long gone.

Heck I'm probably the one who cut the hoses off.

Anyway depending on your set up there are 2 factory holes in the tub just waiting to be used for this so no need to drill.

Pro tip - If you go this route there is some sealer putty around the hoses where they pass through the tub.
When they punched the metal sharp edges were of no concern so be weary of knife edge points sticking out.
I took a brass dowel and hammered them flat before running the new lines through and installed rubber grommets.


Option 2 is just to notch the cover plate and run the lines through the tunnel next to the linkage.

I didn't take any pictures during this project other than how I mounted the boost controller but could take some pictures this weekend if I have time.
With all of the other projects going on i may not get to this until we do the partial engine drop in a week or so.

[1Bad86]

A step drill bit made easy work of making holes for the lines.

[1Bad86]

Tial's diagram
I like mine better

[Bucketlist]

Alan here is an old thread from my file - not mine but that's why we file these away right?

https://forums.pelicanparts.com/911-930-turbo-super-charging-forum/1034993-tial-46mm-external-gate-ebc.html

I don't use the tee on mine, just intercooler to knob to wastegate but I guess for more control or more potential boost you can run it thru the tee and back to the top of the wastegate like yours is designed.
I reciently moved my dod from the dash to behind the auto heat console where it belongs getting rid of a lot of hose. These hoses run thru the provided hole below the left rear seat.

1Bad86 - I see you have the LM-2 mounted between the seats. Do you have any opinions on that or the logworks 3 program? I guess you could say i'm a long time experimenter with this.
Innovate LM2 and Logworks 3

[1Bad86]

Final version that's in my cars life story book. Hopefully it can just squeeze past the mods.

[1Bad86]

Originally Posted by Bucketlist

Alan here is an old thread from my file - not mine but that's why we file these away right?

https://forums.pelicanparts.com/911-930-turbo-super-charging-forum/1034993-tial-46mm-external-gate-ebc.html

I don't use the tee on mine, just intercooler to knob to wastegate but I guess for more control or more potential boost you can run it thru the tee and back to the top of the wastegate like yours is designed.
I reciently moved my dod from the dash to behind the auto heat console where it belongs getting rid of a lot of hose. These hoses run thru the provided hole below the left rear seat.

1Bad86 - I see you have the LM-2 mounted between the seats. Do you have any opinions on that or the logworks 3 program? I guess you could say i'm a long time experimenter with this.
Innovate LM2 and Logworks 3

The only thing I will say is the afr function works as intended for a length of time until it begins to go wonky and dies. I run a 50/50 mix of leaded race fuel and 93 pump gas.
This mix will kill the lm's sensor relatively quickly but removing the 02 sensor and cleaning on a bench grinder/wire wheel will extend its life a bit but apparently the internal electronics failure rate is high.
If cleaning off the sensor doesn't help i just order a new complete unit and start over.

[Alan L]

Thanks guys. Sleeping on it, it is clearer now. And it does seem to have two options - to loop back to top of WG or not.
I am not sure I have those two holes in the body shell - will hoist it up again today and check.
1Bad86 - nice job mounting the DoD.
Regards
Alan

[Alan L]

So I tried the configuration posted by 1bad86. I am bench testing this setup - so not sure if this is accurate or not. But I get no change in boost pressure by tweeking the DoD knob with this setup.
I then tried the following setup - via UTube. This is the exact same controller complete with the check valve as in my first pic.


This gave me around 2 psi variation with the boost controller.
Am I missing something here? Or is this bench test not appropriate? For turbo boost input instead of the turbo I have my shop compressor dialled back to around 10-15 psi input. I have a gauge Teed in straight after the compressor coupling to the lines as shown.
Thanks
Alan

[1Bad86]

Just throwing this out here,
On my controller when turned fully counter clockwise and topped out it is in the "closed" position.

It seemed backwards at first and takes a few turns (screwing down clockwise) before I notice changes on the boost gauge.

I'm running a 935 style gauge and. 7 bar spring in the WG trying to keep me honest.

Could your DOD or WG be leaking a bit or out of adjustment range (turns) before you notice the gains you expect?

I'm not familiar with that brand and just went with the same set up I had on my GN.

I really want a 934/935 style controller but my lottery numbers haven't hit yet.

[Alan L]

Mine is counter intuitive also. LH thread. I have had it fully open and fully closed. I get nil change in your configuration and 2 psi change in the other.
It strikes me that my latter configuration is problematic - with the controller venting to waste. That would suggest an airleak on vacuum. Altho it seems to be a configuration in use.
Does my head in. Supposed to be simple.
Regards
Alan

[1Bad86]

I heard that lol.
In my mind it's just a simple looped air valve but....

I will say all of my components were new and assumed working properly.

Pro tip #2
Make sure all hose clamps are gorilla tight.
I'm using barbed fittings for all the connections except at the IC.

They will happily let you know that gudentight isn't enough when you go for a road test and give it a little loud pedal.

Laying on hot pavement in July reaching up in the fenderwell to re connect a blown off hose is living.

I will say that MikeD witnessed me do a roadside repair outside of the tajmahgarage one year.

I came outside to discover a rather large puddle of oil under my car and expressed "That's never good" but that's a story for another time.