Single vacuum port, if I have it correct the '74 D-Jet retard port only should connect to the dizzy vacuum port and switch set to B.
'73 advance port connects to dizzy and switch set to #1.
But I could be wrong.


Click to view attachment

Inquiring minds want to know.

I also have a friend with a Fiat that would probably buy if the discount could apply.

That looks familiar!

This is a great question and I had paid it particular attention.

Brad Anders addressed the stock functional characteristics last year to his web page. The change came in 74 apparently.

I am assuming.....and that is a BIG word that the vacuum porting is for the retard function.

It also matters which port that pipes to rhe dizzy. Retard ports are in a different location as noted in your drawing Jeff.

I need to also make this confirmation as well as the TB I have is a 74. I think I.m going to call Ed about this. I am curious if those that have one on Djet set up on stock system alteady can answer this?

Yes you could be.

[/quote]
Single vacuum port, if I have it correct the '74 D-Jet retard port only should connect to the dizzy vacuum port and switch set to B.
'73 advance port connects to dizzy and switch set to #1.
But I could be wrong.

[/quote]



Yes you could be.
[/quote]


From the install manual.

Click to view attachment

Blocked and shot with sealer, tomorrow color.
Thanks pete000

Mike

[quote name='mgphoto' date='Oct 19 2017, 03:39 PM' post='2539516']
[/quote]
Single vacuum port, if I have it correct the '74 D-Jet retard port only should connect to the dizzy vacuum port and switch set to B.
'73 advance port connects to dizzy and switch set to #1.
But I could be wrong.

[/quote]



Yes you could be.
[/quote]


From the install manual.

Click to view attachment
[/quote]


So for the benifit of the other readers what year is your D-jet system and what vacum port did you tap for the 123 Dizzy.

Can you post picture of the distributor installed and leave the hood on another thread please?

Thanks.

Who ever installed stratplayer's (Jim) should know the details. Does the 123 take the MPS out of the equation?

No Kevin,

Trigger points and vacuum advance can. Two NLA items.

Good idea. Jims is a stock 74 IIRC?

Yes Jeff.

Here is the answer I got from Ed on the tempeture question and the vacuum port question:

On the switch model there are five curves that have vacuum advance and five curves that have vacuum retard.
It modulates the vacuum curve when a hose is hooked up to the device. If there's no vacuum it doesn't change the Curve.
The 95 degrees has not been a problem with any other VW or Porsche applications.


I.m getting it.

Mine is a 76 D Jet, 2056. The install was easy just follow the install instructions and it will be easy. I will take some pics of my setup tomorrow and post them. We set the curve on my setup to 4. Car runs like a raped ape.

.....oh yea it uses a Hall Effect sensor to trigger the injectors from what I was told.

Thanks Jim.

Here is the dizzy that I'm using. When it was installed a new blue coil was installed with it.
https://www.123ignitionshop.com/gb/porsche/...he4rvieset.html

Can.t answer for -6 but the discount for any other model would apply to the discount for three weeks Pete.

I will go for one. Just need to make sure that t his is the correct (and only) option for my 1974 2.0, completely stock???

http://123ignitionusa.com/porsche-912-914-...ncludes-spacer/

Can someone explain the Bluetooth part? What does it do and how does it effect the motor or drive Ability?

It's so you can custom tune your advance curve rather than use the preset curves, something that could be useful with a non-stock motor or if you like fine tuning. If you're not the kind of person who is going to fiddle with your exact ignition timing and just want a more reliable, modern components it's really not necessary.

I found the manual for these and it has a list of the advance curve presets and comparable stock dizzys but...didn't see one listed for my stock 74 2.0L 205A dizzy. What to do?

The 205A is Bosch # 0231 174 011 with retard only throttle body for '74. Switch position B according to the install manual page I posted earlier.

Aha! They used the Bosch PN. Muchas gracias...

OK, building up my wife's 71 1.7L motor to a 1.9L, keeping the stock D-jet system. I don't remember if the OEM distributor had a vacuum can on it or not ... guess I'd better locate it and take a peek.

I'm tentatively in, pending verification of which model # I'll need (vacuum option or not)

Placed my order this morning. Coupon code "914World" wasn't working last night but it is this morning.

Looking forward to dialing the curve to the "raped ape" setting

Thanks again for getting this going, Rob.

So I have a 75 2.0 but with a TB from a 73, I guess its the same non-blue tooth model, I just select the proper setting depending on whether or not I have the advance, retard or both? I have both on mine....

Rob - I'm right there with ya. Just ordered opt #4 from OG post. Coupon is live for those that can't wait

Ordering today...

Order Placed.

This will be interesting.

Order Placed.

I just placed my order for my 1974 914 2.0 D-Jet F.I. (Original) stock with a few internal mods.

combo=123/Porsche-4-R-V-IE distributor (injection) + coil +spark Plug wires (black)

Hope I ordered the correct one for my 914.

Tom

This is exactly what I am building and the same one I ordered.

914-teener,

Thanks for your confirmation. I was hoping someone would comment on my concerns. It was based on our expert 914 opinions (Bowlsby-Beat Navy-Etc-Etc) to select this combo.
Hey Bowlsby I also selected black spark plug wires
Tom

Well...I don't know if I'm an "expert" but I have read a lot on the curves on the stock distrubutors. Last year I had gathered what I thought was a workable distributor that I could use for a 2.0 build that will use a 74 stock D-jet setup. Turns out the distributor parts are all worn out and two ....NLA. All the other components besides the MPS were workable. Jeff Bowlsby did rebuild the MPS and it has been tested.

So after doing a LOT of reading I had decided to contact this company about their product and talked to a few members that already have it.

I want everybody to know...and I don't know how it was done...but I didn't edit my first post in this thread making the recommendations. I thoroughly read through the brochure and did contact Ed personally with several phone calls. According to my notes and conversations this is the one for a 74 D-jet system. The vacuum port is optional.

Last year Brad Anders wanted to know where the curves were published and then did a pretty good addition to his website on the history and operation of the distributors. If you haven't read it, makes for a good understanding of the advance theory and why Porsche changed it through the years. Dave Darling also published a chart on the distributors on the Bird Board. As Murphy's law would have it...I had the 205B with a question mark on the reference table. So, unknown.

What I can tell you is, that if you have a 74 D-jet setup, I have purchased the same one you have. I started the thread to save a few bucks and help others whom might be enthusiasts like me struggling to find parts for these cars and still try to emulate the stock look or performance.

I think you'll be just fine.

Rob

Whoops, that was me. I thought it would be helpful to put all the info up front. Your post above has made me rethink that practice. I should have at least PM'd you. Sorry!

It.s okay Mark....figured

Just placed my order for the Bluetooth model for the engine I am currently rebuilding for my 1976 Porsche 912E. It is bored and stroked to 2270 (based upon the Raby 912E engines). Hope we get to the 15% Discount!!!
Brook

Ordered my D-Jet unit today. This will be interesting too, once we all get ours and install, to hear the various experiences.

Still not totally clear to me if I should be connecting the vac advance or retard lines, since the 76 has both, but this has to be a good step in the right direction. I will get my hands on a spare distributor clamp, and leave my original all timed and in the tool bag. That way if there are any issues (all electronic guys, functionality is usually binary, either works or doesn't) I have a spare to drop in at side of the road.

Looking forward to getting mine. Now to go count how many have ordered to see if we are going to hit the 15% number!

Pretty sure we have five now.

With respect to the advance or retard question read Brad Anders site and then the instruction manual.

It is interesting and will answer your question.

I will also end up with a spare distributor..."just in case".

Just talked to Ed today- probably don't need the bluetooth option but may get it to have for the future. Just need to make sure that model has the 16 or so preset advance curves in it if I don't need or want to get "fancy" right off the bat.
Not sure I'm smart enough to use the bluetooth option anyway!

Ordered for my D-Jet stock Also have one for my Volvo ES
Olsib914

That was a good read ! Thanks for sharing.

Just ordered mine, Bluetooth version for my L-Jet 1.8

Order people !, need that additional 5% !!!

Thanks for the good advice here. After reading Brad's page on distributors, and looking at the 123 manual again, it seems pretty clear that there are no performance advantages to connecting the vacuum retard. It was to improve emissions results, and only served to degrade performance at low speeds until the throttle was opened enough to take it out of the equation.

The 123 manual page shows that there is a single vacuum port that can be electronically configured to either provide vacuum advance (settings 1-8) or vacuum retard (settings 9-F). That probably leaves settings 1-8 as the viable options, aside from capping off the vacuum port entirely.

Thanks again for the good advice. Appreciate it!

I count 8, maybe 9 ordered right now.......

I thought this distributor looked familiar. I ran across this 914 install a few months ago on YouTube. How's everyone's German!?
https://youtu.be/rw1FigYoozE

Weekend Bump and Count added.

For those have the programmable units already, any tests using a stock curve and then a "tuned" curve following 123ignitions lessons?


http://123ignitionusa.com/123ignition-lessons/

I understood the eins, zwei, drei perfectly -

He posted a second video ... and you can see those awesome ATS Classic wheels on his car

Can someone post a link to Brad's write-up on these distributors - gotta make sure I ordered the correct one

I think it's Dutch, but I could be wrong.