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Hey john , the Porsche part # 92811123102 and the Bosch # 0280161007
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 11-18-2011, 04:13 PM
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here's the P E T , you will also need the 2 fuel lines and union to the fuel head.
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 11-18-2011, 04:18 PM
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Quote:
Originally Posted by j930 View Post
helio you have the fuel thing(cant remember the name) that adds fuel at boost. where did you find it? its in the center of the picture with the spring on the front.
Well that's a cool diaphram damper listed for 1988, but it has nothing to do with fuel enrichment on boost. The only thing stock that does that is your WUR. I'm just guessing, but that damper must have some function to dampen fuel pressure surging between the top and lower chambers of the fuel distributor. There are folks out there that know K jetronic fuel heads/distributors like the back of their hands. Perhaps they'll chime in here.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-18-2011, 04:46 PM
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I had one on my engine - at the back of the fuel head - not quite mounted like that - but plumbed the same way - ie interrupting the CP line. It is a common fit on Mercedes. But basically it is a spring loaded diaphragm which seems to have the purpose of smoothing out spikes in CPs and possibly stabilising the airplate from flutter. But does not enrich boost.
It can only respond to what the CP line is doing. You can throw that away (join the lines up) and the fuel head should still function as supposed to.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 11-18-2011, 06:07 PM
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i remember reading a article or a post about that doing something with enrichment but i must be thinking of something else.
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84 930 Slant
15 Sonata 2.0T
08 Ram 1500
15 Ram Eco Diesel
Old 11-18-2011, 08:08 PM
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I Know that this part comes on all CIS RUF cars and 930S & SE that ran at higher boost than the regular 930, and I have seen it on the Brumos 965 Bridgestone series race cars, What the function is not clearly known , I was able to locate a OEM part , and installed it last night , I will be going to a Dyno this morning do do some tuning, we will see what it does, I will report my findings , also adding a rising rate fuel reg,
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 11-19-2011, 04:03 AM
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This is some info I found.

Several years ago we installed the damper shown in the photos, The reason for this mod is to reduce the sensor plate occillations that can occur when using camshafts with longer duration, In addition to Porsche , It has been used by RUF and other tuners in the late eighties in some of their modified 930's .
The vent should be run into the air cleaner housing , in case there is a diaphragm failure

The Tuner shop
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 11-19-2011, 04:17 AM
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Quote:
Originally Posted by heliolps2 View Post
I Know that this part comes on all CIS RUF cars and 930S & SE that ran at higher boost than the regular 930, and I have seen it on the Brumos 965 Bridgestone series race cars, What the function is not clearly known , I was able to locate a OEM part , and installed it last night , I will be going to a Dyno this morning do do some tuning, we will see what it does, I will report my findings , also adding a rising rate fuel reg,
I wonder if maybe the fuel accumulator on the normal (non-RUF) 930's was added to replace this gizzmo's function? Besides providing a small fuel reserve under pressure, it also functions to dampen pressure surges I believe.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-19-2011, 04:18 AM
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I also found these.



THIS mounting on dell'arricchitore fuel injection pump 930 turbo
- ACTS AND WORKS when the pressure exceeds the turbine or 8 bar opening injects gasoline --
This original device is fitted as standard on the Turbo S 930/66.
Not having an electronic control that automatically adjusts the fuel pressure this device prevents the higher pressure, or 8 bars become "LEAN"
avoiding breakage of the motor -
Council:
1 - to all those using the spring bar-1
affordable --
2-all in porsche kit costs about 280 € + assembly -
disadvantages:
1-mounting is not easy because it is applied behind the pump, however, does not need to lower the engine
2-important after redo the carburetion in um Porsche Center.
here are the pictures of the mounting
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 11-19-2011, 04:27 AM
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helio i will be interested in the results!
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84 930 Slant
15 Sonata 2.0T
08 Ram 1500
15 Ram Eco Diesel
Old 11-19-2011, 06:51 AM
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basically I think it is a mini Accumulator that acts directly and specifically on the CP/Airplate system to smooth out aberrations. I also came across some info on it recently while reading something else. Will try and find. But you can imagine the airplate and CP line/fuel head are basically hard wired to each other, with liquids being incompressible. This system placed in the hard wiring allows some buffering via the spring/diaphragm. Dont know about the one in the pic, but mine had an adjustable hollow screw in the base. The hollow bit is to vent the base to atmosphere and it seems you can tweek it to set various spring pressures - probably in accordance with the CPs you are running.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 11-19-2011, 09:57 AM
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Remeber the early Euro fuel heads with thei stainless diaphragms are very susceptible to damage via CP line spikes. At a guess that is what provoked this addition to the CIS system.
Hard to see what else you would do to address that issue.
Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-)
Old 11-19-2011, 10:00 AM
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Quote:
Originally Posted by Alan L View Post
basically I think it is a mini Accumulator that acts directly and specifically on the CP/Airplate system to smooth out aberrations. I also came across some info on it recently while reading something else. Will try and find. But you can imagine the airplate and CP line/fuel head are basically hard wired to each other, with liquids being incompressible. This system placed in the hard wiring allows some buffering via the spring/diaphragm. Dont know about the one in the pic, but mine had an adjustable hollow screw in the base. The hollow bit is to vent the base to atmosphere and it seems you can tweek it to set various spring pressures - probably in accordance with the CPs you are running.
Alan
Thanks Alan, I think you're probably right-on. Again, this little gizzmo has nothing to do with boost enrichment. All that is taken care of on a 930 via the warm up regulator receiving a boost signal and lowering control pressures accordingly.

We continue to learn about different years and applications. That's what this forum is all about.
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-19-2011, 11:33 AM
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well today was very interesting , I went to Tuner Technics to put my car on the Dyno and the fuel damper did nothing as far changing AFR's that we could pin point , I'm gonna leave it on because I think it has it's purpose , like some of the reasons suggested by you guys, but learned some other things , that will be my next post
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 11-19-2011, 05:17 PM
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got the call today that it is ready to go, heading out in a few minutes to pick her up. I guess that the aar was way out of adjustment(i am thinking all gummed up) and the fuel/timing needed a lot of adjustments. they were using the wrong initial settings. a special thanks to helio who had the same issues and gave me a good trail to follow to get the vacuum lines routed properly. the vacuum lines were the issue with the low initial idle as they were not using the switch on the engine for some reason? but i will report on how she is running when i get home. Another thanks to mark for the pic of his aar as i could bet tell from all the other descriptions how far that thing was to actually open. I will report back tonight with how she's running! thanks guys.
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84 930 Slant
15 Sonata 2.0T
08 Ram 1500
15 Ram Eco Diesel
Old 11-21-2011, 03:25 PM
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yeah its running great! idling just below 1K starts right up and slowly comes down from 1400. THanks again! have a great Thanksgiving and be safe!
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84 930 Slant
15 Sonata 2.0T
08 Ram 1500
15 Ram Eco Diesel
Old 11-21-2011, 05:33 PM
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Excellent! Now don't let anyone else touch your car...hooking and unhooking things, adjusting this and adjusting that. These things really aren't all that complex - all mechanical in nature (other than those various relays and a Lambda controller if you're using it) - but like any automobile the basics of ignition timing and fuel delivery have to be correct or we just chase our tails.

Point of interest: The AAR's aren't designed to be "easily" adjusted, but can be by driving in a pin to increase the opening. Drive it too far, and you have to take her apart to drive it back the other way. I think the spring tension on the bi-metalic component weakens with age to where adjustment eventually becomes necessary. One of the many first things I did to my car to get her where I wanted.

Now, out you go for a spirited late Fall run through the desert (wish I could do the same, but winter is setting in with that funny white stuff falling from the sky
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Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-21-2011, 06:41 PM
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off i am going, just ordered a new passport ix on saturday to try and get a little warning for where the police are hanging out. this is the time of year all of arizona looks forward to!
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84 930 Slant
15 Sonata 2.0T
08 Ram 1500
15 Ram Eco Diesel
Old 11-21-2011, 07:09 PM
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Great Idea, Have fun and enjoy

Helio Losee
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1986 944 turbo -first car
1997 993 Cab 6 speed-sold
1992 964 C2 turbo
SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo
Old 11-22-2011, 08:22 AM
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