| Porsche 911 & Turbo CIS Fuel Injection - Page 1 |
| 911 (1974-83) and 911 Turbo (1976-89) CIS Fuel Injection & Systems |
For more than ten years, Porsche used the Bosch K-Jetronic Continuous Injection System (CIS) on all production 911s. The system in general is very reliable, and was only bested in 1984 by the introduction of the Motronic engine management system that controls both ignition and fuel injection together.
The CIS meters the amount of fuel provided to the cylinders as a function of the air drawn into the engine. The CIS air flow sensor plate measures the amount of air that is being drawn into the system. This sensor plate is attached to a fuel distributor that evenly meters the amount of pressurized fuel sent to each injector. The system doesn't differentiate among the six injectors - it sends the same amount of fuel to them at all times. Unlike pulsed-injection systems like the Motronic system or even the earlier Mechanical Fuel Injection system, the CIS injectors distribute fuel to the cylinders at all times. The opening and closing of the intake valves controls the intake of fuel into and out of the combustion chamber.
Through 1979, CIS was a semi-open-looped system, which means that it didn't monitor the output gases from the engine to see if the air/fuel mixture was set at the appropriate levels. In 1980, emissions requirements forced the introduction of an oxygen sensor into the system, which helped the engine to better run at the appropriate mixture level through the regulation of fuel pressure inside the fuel distributor. |
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Air Filters |
| Clogged air filters can reduce air flow into the injection system causing reduced power, and inefficiency in the fuel injection system. Be sure to replace your air filter whenever you do a tune-up. |
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| 911-110-185-02-M67 | Air Filter, 911 (1974-83)
Brand: Mahle Filter [More Info] |  |
| $9.75 |  |
| 930-110-185-02-M67 | Air Filter, 911 Turbo (1976-89)
Brand: Mahle Filter [More Info] | |
| $25.75 | |
| K&N Air Filters |
| K&N air filters are designed to achieve high, virtually unrestricted air flow while maintaining filtration levels critical to ensure long engine life. The secret to their success lies in the unique characteristics of their filter medium that was originally developed by K&N all those years ago in the dust, sweat and tears of desert motocross racing. The high flow cotton gauze air filter is washable, reusable and built to last for the life of an engine. The filters consist of four to six sheets of cotton gauze layered between two sheets of aluminum wire mesh. This media is then pleated and oiled to enhance its filtering capabilities and overall performance. The result is an air filter that allows dramatically more air into an engine, is washable and reusable, and will protect your engine for the life of your vehicle. |
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| 911-110-185-02-M318 | K&N Air Filter 332004, 911 CIS (1974-83)
Brand: K&N [More Info] | |
| $75.50 | |
| 930-110-185-02-M318 | K&N Air Filter 332530, 911 Turbo (1976-89)
Brand: K&N [More Info] | |
| $59.50 | |
55-0819-560-M318 | | $12.75 | |
Performance Intakes |
| AireTEK High-Performance Intakes |
AireTEK High Flow Induction Systems: Engineered to flow MORE air for MORE power. It's that simple. Just like an asthmatic relying on an inhaler to breathe easier, our AireTEK Induction System will "decongest" your engine to allow more air intake with less restriction. Our CAD designed streamline air plenum incorporates a patented high flow air filter, which assures optimum performance and durability. All AireTEK induction components undergo countless hours of research and development with extensive dynamometer and "real world" testing prior to manufacturing and distribution. Average gains are 6-12 HP depending on vehicle and level of other performance upgrades.
911 Carrera Installation Instructions (PDF) |
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PEL-INTK911 | AireTEK Fresh Air Induction Kit-HighFlow, 911, 1984-89 [More Info] | $195.00 | |
PEL-INTK930 | AireTEK Fresh Air Induction Kit-HighFlow, 911 Turbo, 1978-89 [More Info] | $399.00 | |
Fabspeed 911SC High Performance Airbox |
| Two large openings of 5.4" x 2.4" for maximum airflow. Rain cannot come in. Side entry airflow like a covered bridge. Very hi-tech carbon fiber look for your 911 engine bay. Simple and easy installation in 5 minutes. No other company offers a high performance air intake for these cars. |
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FAB-911-SCHPA | Fabspeed High Performance Airbox, 911/911SC (1974-83) [More Info] | $175.00 | |
CIS Airbox Cover |
| Enhance the sound, looks and performance of your 1973-83 911 with this great looking CIS Airbox Cover. Made out of strong composite material, tough enough to stand up to all kinds of abuse, and uses the stock filter and mounting points for ease of installation. With over 3 times the intake area of the stock cover, your engine can get all the air it deserves. Finished in a cast aluminum look, it looks good right out of the box, or paint it your favorite racing color for an individual look. The increased intake area creates a more aggressive growl that sounds like you are ready to compete. Designed to clear your A/C Condenser and heater hose. |
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JM-AB-0033 | JM CIS Airbox Cover, includes mount rings (or use your factory hold-down straps), 911 (1973-83) [More Info] | $130.00 | |
Fuel Filters |
Keep your injection system clean by changing your fuel filter every 6000 miles.
IMPORTANT: Please verify Bosch part # on your current filter prior to ordering.
NOTE: Always use properly sized flare nut wrenches on all fuel line fittings. If you do not yet own a quality set, then please browse our selection of SK Flare Nut Wrenches. |
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| 0-450-905-062 | Fuel Filter (Bosch 0 450 905 021), 912E (1976) (NOTE: need to remove the steel fittings on either end of the original filter and install them on the new one)
Brand: Bosch [More Info] | $11.00 | |
| 911-356-901-00-OEM | Fuel Filter Update Kit, 911 (1974)
Brand: Genuine Porsche [More Info] | No Longer Available | |
| 911-110-176-00-M14 | Fuel Filter (Bosch 0 450 905 003), 911 (1974-76)
Brand: Bosch [More Info] | |
| $13.00 | |
| 911-110-176-02-M14 | Fuel Filter (Bosch 0 450 905 016), 911 (1974 with updated filter), 911 (1977)
Brand: Bosch [More Info] | |
| $14.50 | |
| 930-110-076-00-M14 | Fuel Filter (Bosch 0 450 905 021) 911 (1978-80)
Brand: Bosch [More Info] | |
| $26.25 | |
| 928-110-147-05-M67 | Fuel Filter (Mahle) 911 (1981-83)
Brand: Mahle Filter [More Info] | |
| $16.25 | |
| 928-110-147-05-M45 | Fuel Filter (Hengst) 911 (1981-83)
Brand: Hengst [More Info] | |
| $14.50 | |
| 930-110-139-00-M14 | Fuel Filter (Bosch 0 450 905 281), 911 Turbo (1976-79)
Brand: Bosch [More Info] | |
| $30.75 | |
| 928-110-147-05-M67 | Fuel Filter (Mahle) 911 Turbo (1981-89)
Brand: Mahle Filter [More Info] | |
| $16.25 | |
