Cis porsche 911 00. In nearly 17 years (and 30k miles) I have owned the car, I have made a number of modifications to improve performance and reliability to the engine (de-smog, SSI header/heat exchangers, Bursch muffler, Carrera 3. CIS Fuel Injection Components Also called K-jetronic, this fuel injection system was used on six cylinder Porsche® after MFI, from 1973. make: Aug 25, 2013 · Remember that the CIS is a constant injection system which means the injectors do spray 100% of the time anyway. Jul 23, 2021 · This engine is built from the case to running. g. The basic tests are: This site contains information on the Bosch Contunious Injection System (CIS) used on the Porsche 911 engines from Model Year 1973. 6 964-based turbo, but I am sure about the 3. On any given day, browse the Pelican Parts Forums and guaranteed you will find at least one or two active threads on CIS issues. Anyway, it would be better now that we could get some numbers about the fuel pressure provided he has a good working set. 86 930 94kmiles [ _ _ ] RUNNING: [__] NOT RUNNING: ____77 911S widebody: SOLD Jan 5, 2018 · Hi Pelican friends- I've got a 1976 911S with the stock CIS 2. from what I have read the correct position of the plate should be near the edge of the taper. 5 through Model Year 1983 You will not find inferior shiny junk here, only performance systems with a sound that is unmistakable high performance air cooled Porsche. Apr 30, 2021 · In short, the accepted wisdom holds, if you want better performance from your CIS-injected 911, after backdating the exhaust the next step is an obligatory scrapping of the fuel injection in favor of carburetors or, more expensive yet, a customized fuel injection setup. the lever doesn't even sit on the clip. In this lesson, we take a look at an engi Porsche 911 3. They just go about it in different ways. We felt like all us CIS lovers should have a housing that Feb 7, 1977 · Per the 101 Projects for your Porsche 911 book I have located the fuel mixture adjustment allen wrench hole (page 96) located between the fuel Pelican Parts Forums CIS rich to lean adjustment - 1977 2. Nov 18, 2009 · Pelican Parts Forums > Porsche Forums > Porsche 911 pca 30 year member,1977 porsche turbo body targa Maintaining a CIS car to run great consistently for many This CIS troubleshooting is taking too long to solve because of the wrong approach to solving this problem. 5/1 engine with PMS flywheel, 964 cams, flowed heads, ssi's short geared 915 w/lsd, polybronze, bilstein,working lambda, modified and highly tuned cis, tensioners, pop valve, backdated exhaust and heater, 2300 lbs. He has a Rennlist site on CIS which is very good. 75bar Nov 5, 2020 · Porsche 911 CIS Reassembly Part 1. This particular model year ('73. The Porsche factory workshop manual shows a page for 1974/1975 models with WUR specifications that include both vacuum controlled versions and non-vacuum versions. 911 T: 2. Jan 11, 2008 · Check out Jim Williams. They seem to have the thicker wall needed to prevent pulsing that occured with another brand. I have had and still have the exaxt same problem. This is a site to learn all about the Porsche 911 fuel injection system called CIS (constant injection system) or Bosch K-Jetronic. (The Turbos used CIS all the way up until, I think, the 993 Twin Turbo. Those 2 lines go to the distributor and top of the WUR as described. 0 It has been running perfectly, rebuilt WUR, rebuilt FD matched and tested to the injectors, new fuel lines pump and Pelican Parts Forums 911 1976 cis - Pelican Parts Forums Oct 8, 2024 · joe engin e e r dot com/porsche-911-cis-subcomponents-and-testing/ or https://rb. 5 through Model Year 1983 RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. Tony May 16, 2015 · RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. Once you get the fuel leak under control, you can prime the CIS by lifting the airflow sensor plate briefly (don't let it run too long - or you'll fill the cylinders with fuel). 2 front fender mounted oil cooler/fan, free flow air filter housing Aug 20, 2021 · The C. Its began to have a hard time starting, running very roughly when its cold, and popping and backfiring. The Bentley manual has a lot of info on CIS. Somewhere at home I have the 1973 factory technician training brochure for the CIS systems that use this valve. We find a big difference between running and running well. 0 (1st Porsche, gone long ago but not forgotton) 11-18-2012, 05:39 PM Pelican Parts Catalog | Tech Articles | Promos & Specials # 4 ( permalink ) Oct 8, 2024 · Hi all I have a 1976 911 c3. '73 914 2. 7L - Pelican Parts Forums Apr 8, 2006 · RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. CIS Rubber Lines Replacement Porsche 911 CIS Fuel Injection. S Porsche engine is great if it is running well. Get to know the CIS components, especially the WUR, the AAR and the decel valve, all of which are common problem areas. Time to put this 500-piece fuel system puzzle back together. Dec 4, 2001 · got a problem with 74 911s cis sensor plate. The car had 41k miles and was largely all original. The clearance between the sensor plate and the smallest diameter of the air funnel is so small that you need to use filler gauge (a strip of bond paper) or do a visual adjustment with a light source underneath the sensor plate. This site contains information on the Bosch Contunious Injection System (CIS) used on the Porsche 911 engines from Model Year 1973. It allows you to run a little richer with more advanced timing. It is a good idea to rule out many of the most common sources of leaks right at the beginning. Disclosure: This post contains links to Amazon products and other trusted vendors. Aug 20, 2009 · The first notes, e. 0 sc 9. This info was copied from the Porsche Factory Manual for the Turbo. CIS is a mechanical system that is heavily dependent on proper fuel pressures to function correctly. All US-spec 911s used CIS from 74-83, be they plain 911, 911S, 911 Carrera, or even 911 Turbo. Turbos are not included as their intake systems require a different replacement procedure. Jun 3, 2003 · 1974 Porsche 911 Targa "Helga" (Sold, back home in Germany) I have a 1975 CIS 911 the set up is just like yours. $425. 5 through Model Year 1983 Sep 3, 2014 · Stoddard Authentic Porsche Parts is a leader in the vintage and OEM restoration auto parts for your Porsche 356, 911, 912 or 914. , "same as 911" means that the procedure for testing the 930 WUR is the same as testing the 911 (normally aspirated) CIS unless otherwise noted. (some street use with a Dealer tag) I was having some issues with the existing CIS system, because of the remnants of the smog system. SKU: 0438140160. Sep 14, 2023 · I own a 1975 911 Carrera 2. A fuel pressure gauge is a mandatory tool and it took him this long to get one. 5 CIS and found these 2 sources. 5 to 1983 Porsche 911 CIS air cleaner cover. my idle is rich and kinda rough. US and ROW model differences account for this. Nov 12, 2020 · I typically have these in stock along with all other CIS CIS Porsche FDs and WURs. It affects control pressure depending on the throttle position. 5, 74 and '75 is the regulator on the throttle body. thats the correct WUR. 350whp @ 0. Check that your thermo time switch is getting power during starter operation. Matte Twill Real Carbon Fiber or Matte Black Finish Real Carbon Fiber available to update the look and flow of your 911 CIS Porsche engines. Join me and learn how to assemble the fuel/intake system of a Porsche 911 with CIS/K Jetronic fuel injection. ) May 22, 2020 · The near-supercar Porsche 930 Turbos were all factory CIS-equipped cars. 5 911T in right now for a WUR retrofit and fuel system refresh. Kaefer: the CIS is designed (via venturi design and fuel distributor design) to handle the other operating conditions. 5 911T was the first CIS-equipped car in the world. 7L models equipped with CIS injection and the three-pin ignition module, this distributor offers a hassle-free replacement experience. Tuning CIS Fuel Injection Check out Jim Williams. gy/vave3m Quote: When cold starting it immediatly wants to fire up and then die. 3 one. Your adjustment tool needs to be about 5" long an 3mm as Fred said. As an Amazon Associate I earn from qualifying purchases. Entire fuel system was rebuilt including the fuel distributor. no bolt left Apr 28, 2005 · Pelican Parts Forums > Porsche Forums > Porsche 911 Technical Forum: CIS Fuel Distributor Removal? User Name: (CIS Primer for the 911) (73 911T (RS look) coupe) Oct 23, 2015 · Air box 911-110-104-20 is the new production for (smaller) 34-mm ID intake airbox that has features used in very early CIS and late SC's. It is easy to see why people generally think CIS sucks. Jack: That looks alright to me. $126. Mine is high and I can't adjust it. 06-30-2020, 07:30 PM Pelican Parts But I bleed Porsche, presently have ('83 Cab, '64 356, '68 Sportomatic, '08 Cayenne) fully disassembled, blasted, customized and restored 75 targa with factory hard top, 993 style turbo ft fenders, steel flares, C2 bumpers and rockers, 82 3. Fuel Distributor Repair (911, 914) 32 Fuel Distributor Repair (928) 33 Fuel Pump Repair 34 Pressure Regulator Repair 35 Warm-up Regulator Repair (911) 35 Injector Removal (928) 36 Throttle Activated Valve 36 Electric Wiring Diagram 37 Parts List 39 Test Sheet 40 Porsche K-Jetronic I looked into replacement lines for my 73. 7L with CIS that I bought in 2006. To properly diagnose your CIS system you absolutely must have a fuel gauge like Tony suggested. Say goodbye to complex wiring – the built-in electrical harness with original equipment compatible connectors ensures effortless plug-and-play installation. Here is a pair of videos explaining how to adjust your fuel mixture on nearly every normally aspirated Porsche 911 running CIS. Jul 4, 2019 · Whether it’s carbs or CIS or EFI, the principle is exactly the same. check the CIS primer site, he does list both numbers. The photos and parts shown here are on a 1983 911SC but the general procedures apply to all years within this range. Last edited by Mysterytrain; 10-28-2007 at 08:00 PM . 0 Turbo Carrera 01/1975 - 09/1977. 3 Turbo 12/90 to 8/92 Exchange $425. We also service and modify CIS. Bruce Anderson – Porsche 911 Performance Handbook 1963-1998, Pages 80-87. Oct 29, 2007 · 78SC Targa 3. Hmm, I'm not completely certain about the 3. The Porsche 911 (pronounced Nine Thirdly, the use of K-Jetronic CIS Bosch fuel injection in two of the three models in the line up— the 911 and 911S models Dec 17, 2021 · Mike, It is next to impossible to do a sensor plate alignment with the motor installed in the car. The 911 CIS Primer is an invaluable guide to help you understand, troubleshoot, and maintain your early fuel injection systems. Sold: '74 911, 01 986, 93 Volvo 240 01-16-2004, 02:40 PM Pelican Parts Catalog | Tech Articles | Promos & Specials # 4 ( permalink ). 5T and '74 CIS engines. I. 5) is a peculiar CIS model. 75bar Here is a link to Jim's CIS primer, which is indispensable for understanding CIS. 7 motor (California emissions too). Sep 29, 2023 · Here is a short but sweet 2-part video series on how to adjust your NA 911’s CIS fuel mixture, whether you have the Lambda system or not. 75bar In-Stock Now. Many CIS track cars set the AFR a bit fat as there is more power at about 13/1 AFR. Tailored specifically for Porsche 911 2. The BitzRacing CIS to EFI kit includes everything that is required to fully convert to Electronic Fuel Injection (EFI) from the existing Bosch CIS system, except for the EFI injectors and Fuel Pressure Regulator (FPR). 5 to 1983 on the 911, and to 1994 on the Turbo Porsche models. Continuing or articles on fuel injection systems, in this article we discuss tuning and adjusting the Continuous Injection System (CIS) used on 911 models from 1973-83. Tools needed to replace a Dec 4, 2009 · I believe this throttle enrichment valve was only used on the 911 '73. Dripping becomes a problem when the engine is switched off since it continues to dump fuel into the intakes and cases the residual fuel pressure to drop. Apr 30, 2024 · DIY Videos: How To Adjust Fuel Mixture on Porsche 911 Bosch CIS K-Jetronic Fuel Injection. Orders are built as placed, expect 2-3 weeks for shipment 1973. You will not find inferior shiny junk here, only performance systems with a sound that is unmistakable high performance air cooled Porsche. 5 through Model Year 1983 Jul 2, 2013 · In the 911 SC, there are SO many places that can be sources of vacuum leaks. If the WUR has a vacuum chamber on the bottom, there is a nipple with a line going to the top of the adjustable Deceleration Valve with a T. We have a '73. Some other makers and some of the Porsche euro CIS cars had a vacuum hose to the WUR and when intake vacuum lowered they would lower control pressure which would then richen the AFR for acceleration. Oct 28, 2005 · emac: disabling the O2 sensor dumbs down the CIS so you essentially have the operate like the earlier CIS. Original SC airboxes do not use any drain tube for the airboxes but the new production has it incorporated for wider application. We can exchange many of the Bosch warm up regulators and fuel distributors for a rebuilt unit from our shelf! May 22, 2003 · Sammy's got it right: 1973. The presence of the TPR in tandem with the WUR contributes to the over all control fuel pressures. Porsche 911 Cis Warm up regulator Control pressure regulator. I work with Larry (we are both in AL) as well as a couple other Bosch approved injection shops to get the approved rebuild Nov 12, 2020 · I typically have these in stock along with all other CIS CIS Porsche FDs and WURs. The adjustment screw is way down in the FD. 911 CIS Primer - Description Basic One of the unique things with the '73. These CIS systems have a really hard time starting if the cold start valve is not working. Aug 31, 2012 · Drive safe! 1967 - Porsche 912 1981 - Porsche 911 SC 1991 - Porsche 911 C4 Wide-body Cabriolet Jan 6, 2010 · 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver 01-06-2010, 07:26 AM An affordable solution to convert the Porsche 911 from CIS to EFI. (removed O2 sensor) I know that converting to the 78-79 CIS system would take care of these issues, but I think carbs will open up my options. . This is the third video of the CIS system:Ini Sep 5, 2005 · This is strictly a track car, and won't be driven in cold weather. 2 SS, 964 cams, CIS, SSI's,Dansk Own a gun and you can rob a bank , own a bank and you can rob the world. This is the condensed version, and we have some more lessons on restoring the CIS system and setting it up to Apr 17, 2020 · Porsche 911 Model Years Applicable: Porsche 911 cars from 1973-1983 911 equipped with Bosch CIS K-Jetronic. I have not had the privilege of working on any 930s or 965s so I cant speak for the details of the turbo CIS system. Our parts catalogs are available free with purchase. Porsche 911 CIS has a few key weaknesses that I believe can be addressed easily to result in a significantly more robust fuel system. 0 438 140 160 Porsche 911 3. 91: Replacement number: 0438100006, 0-986-438- 006 Drive safe! 1967 - Porsche 912 1981 - Porsche 911 SC 1991 - Porsche 911 C4 Wide-body Cabriolet The Vacuum controlled units were phased in to the CIS in 1975 for the US, and in 1976 for the Euro models. The good news is you typically don't have to invest a lot of money to find them. I work with Larry (we are both in AL) as well as a couple other Bosch approved injection shops to get the approved rebuild If you still have the original WUR-001 with a TPR (throttle pressure regulator), checking the control fuel measure is not straight forward like those for the later '74 - '83 CIS. most do use the number youare talking about but this one works too. Set the idle and go. May 30, 2020 · CIS Improvements. 911 CIS Primer - Index. The first is Unobtainium, which I read about on another post. 4 K-CIS Injection: 02/1973 - 02/1985: 911. twequeuadnopppaudtnmzjfjyamrcddsrtrsrlahhmolzsybqfwbf