I'm putting together some materials on 914 D-Jetronic distributors I hope to add to my web page soon (along with other updates). I have some questions regarding the 2.0L distributors.

Sources list the following distributors were used for the 2.0L across the model years:

1973: 039 905 205 (vac canister 022 905 271 C)
1974: 039 905 205A (vac canister 022 905 271)
1975-1976: 039 905 205B (vac canister 022 905 271)

I have data for the mechanical advance curve for the 205 and 205A distributors, but not for the 205B distributor. Does anyone have a source for this information? I'm looking for the advance at 1500 and 3000 rpm. I have data for the vacuum advance and retard cells for both the 271 and 271 C canisters.

Another question is the use of vacuum advance on various years of the 2.0L engines. IIRC, the vacuum advance was not connected on the 1975 and 1976 engines. There was a hose that came off of the throttle body (the port was still there), but it was capped and not connected to the vacuum advance cell of the distributor. Is this correct? Was it also disconnected on the 1974 2.0L engine?

Thanks in advance for any help on these questions.

Nothing in factory service manual about 039 distributors. Might be something in the red cover 75 dealer service info guide.

Yes, the FWM doesn't have anything on the 039 series distributors used on the 2.0L engines. That information is available from the Bosch Ignition Parts guide (1997) and also from the Porsche 914 Technical Handbook. The 039 series were used in all of the 2.0L D-Jetronic 914 engines.

I want to say that Ron Meier had the Bosch manual.

At one time I thought he posted the info or had all the info on each.

Thanks, I'll look for it.

FYI, here's an initial version of an informational page on my site on the advance and retard systems on 914 D-Jetronic distributors.

http://members.rennlist.com/pbanders/distributor.htm

Hi Brad,

I can help, but only if I know the Bosch nos. VW 0 39 905 205B should be Bosch 0 231 172 021. Can you confirm that? If yes, I will search for the curves.

Regards from good old Germany,
Dr-DJet Volker

Hi Volker,
according to the old Bosch list the Bosch #s should be:

1973: 039 905 205 (vac canister 022 905 271 C): 0 231 174 010 (009 without VW sign/logo), up to 1973/6

1974: 039 905 205A (vac canister 022 905 271): 0 231 174 012 (011 without VW sign/logo), 1973/7 to 1974/7

1975-1976: 039 905 205B (vac canister 022 905 271): 0231 172 022 (021 without VW sign/logo) 1974/8 to 1975/12

Regards
Norbert

- The distributors are not mentioned in the red Bosch D-Jetronic-manual at all -

Hi Norbert,

thank you. Bosch Automotive Tradition's website was without Search function this morning, that is why I could not find the info myself.

Okay, well then. 0 231 172 021 or 022 has following data:

- Centrifugal from 1000 to 2600 rpm by 22° early
- vacuum in idle by 10° late
- vacuum load dependent from 120 mmHg to 200 mmHg by 12° early

All advances are in degree crankshaft. Bosch denotes them for ignition distributor test stands in ° camshaft.

Hope that helps.

Best regards from Germany,
Dr-DJet Volker

(Caution: Stupid Off-Topic question below!)

Is there a significant different between D-Jet and L-Jet distributers?

For sure:

D-Jetronic distributors carry trigger points for injectors.

Secondly during the time of K-Jetronic and L-Jetronic breakerless ignition distributors were introduced. But I am not too sure when that was started in 914. Mercedes switched from breaker-controlled transistor igntion to breakerless transistor ignition when they switched from D-Jetronic to K-Jetronic.

Best regards from Germany,
Dr-DJet Volker

Thanks, that's just the information I was looking for.

I am fairly sure the L-Jet 914 are still conventional ignition?
I could be wrong, but thought it still have FI timing in the dist.

Hi Brad,

have you seen that I have also replied here about the missing Bosch D-Jetronic testers. One of them is in my eyes superior to the EFI 9100.

Funny, I am also just working on an ignition compendium for Bosch distributors and ignition control module of 70s and 80s.

I thought I remembered some info for the 2.0 distributors in the 914 FSM. There were graphs for some distributors and tables for others, and one or two had both types of data.

...Hmmm... I had thought that the info wound up in the "914 Info" section of this site, but I didn't see a link to it!

OK, I know that the old Renegade 914 Club website had the info. A quick trip to the Internet Wayback Machine gives us:

http://web.archive.org/web/20030202024600/...ww.dgi.net/914/

--DD

here are the numbers from my 73 2.0 L Djet distributor:

Click to view attachment

914 1.8L with Ljet had standard point dizzy's with no trigger points. Basically a bus dizzy with a different advance curve

Thanks! (Always willing to learn)