MAF Kits
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| The MAF kit is a nice upgrade for air flow meter engines. On smaller engines, gains of around 12 hp and 12 ft-lbs of torque are typical. On larger engines gains of 18 hp and 18 ft-lbs are common. You will feel the benefit with quicker throttle response, smoother acceleration and a more free-reving top end. |
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| E30 M3 engine with stock AFM |
E30 M3 with MAF conversion |
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| The main benefit of the MAF conversion comes from the wide open cross section of the MAF sensor. This removes a major restriction from the intake resulting in less pressure drop, better cylinder fill and more power.
A second benefit of running the MAF conversion is the ability to retune the engine for other mods. The MAF kits come with a calibrator that is used to match the curve of the MAF sensor to the curve of the original air flow meter. The calibrator is also capable of fine tuning the fuel curve to compensate for things like a cold air intake, cams, headers and a free flowing exhaust.
There are two types of MAF kits. The A kit uses the front panel adjustable ARC2-A calibrator. It is on-the-fly adjustable from the driver seat. The P kit uses the laptop programmable PSC1-004. It requires a laptop to tune and is not real-time programmable. The PSC1 will require a few hours to tune vs. 15 minutes for the ARC2-A. However after the PSC1 is tuned you will have a far more precise tune and better performance. |
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| Front panel adjustable ARC2-A used in A kits |
Laptop programmable PSC1-004 used in P kits |
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Universal MAF Kits
Universal MAF kits can be used on a wide range of applications like BMW, Porche, Mercedes, Volvo, Alfa Romeo, etc. In general the universal kits are compatible with most Motronic air flow meter systems. The kits do not work with L-Jetronic systems because of their higher operating voltage range. To make sure that your car is compatible with the universal kit, you can measure the air flow signal from your stock sensor. Measure the voltage with the ignition on and engine off. Move the flapper over its entire range of travel. If the signal stays within the range of zero to 5V, your system is compatible with the universal kits. If your air flow signal goes above 5V, we may be able to offer a solution using the higher voltage PSC1-009 calibrator.
In addition to the choice of either the A (ARC2-A) or P (PSC1-004) kits, the universal kits also are available with either the MAF 3.0 or MAF 3.5 sensors. There is more information about these sensors in the Sensor section. |
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| MAF 3.0 sensor with 3.0” outlet |
MAF 3.5 sensor with 3.5” outlet |
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| Along with the air/fuel calibrator and MAF sensor, the universal kits come with a wire harness that plugs into the MAF sensor and the ARM1 air/fuel meter. |
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Universal MAF Kit 3.0-A
Includes:
- MAF 3.0 Sensor
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- Instructions
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Universal MAF Kit 3.0-P
Includes:
- MAF 3.0 Sensor
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- Instructions
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Universal MAF Kit 3.5-A
Includes:
- MAF 3.5 Sensor
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- Instructions
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Universal MAF kit 3.5-P
Includes:
- MAF 3.5 Sensor
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- Instructions
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BMW Specific MAF Kits
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E28 535i-A
Includes:
- MAF 3.0 Sensor
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harnes
- ARM1 Air/Fuel Meter
- 3.5” to 3.0” Reducer/coupler/clamps
- Instructions
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E28 535i-P
Includes:
- MAF 3.0 Sensor
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 3.5” to 3.0” Reducer/coupler/clamps
- Instructions
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E28 M5-A
Includes:
- MAF 3.5 Sensor
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 3.5” to 3.0” Reducer/coupler/clamps
- Instructions
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E28 M5-P
Includes:
- MAF 3.5 Sensor
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 3.5” to 3.0” Reducer/coupler/clamps
- Instructions
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E30 325i-A
Includes:
- MAF 3.0 Sensor
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 3.0” to 2.5” Reducer/coupler/clamps
- Instructions
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| E30 325i-P
Includes:
- MAF 3.0 Sensor
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 3.0” to 2.5” Reducer/coupler/clamps
- Instructions
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E30 M3-A
Includes:
- MAF 3.5 Sensor
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 4” Elbow/coupler/clamps
- 4.0” to 3.5” Reducer/clamps
- Instructions
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E30 M3-P
Includes:
- MAF 3.5 Sensor
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 4” Elbow/coupler/clamps
- 4.0” to 3.5” Reducer/clamps
- Instructions
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E34 535i-A
Includes:
- MAF 3.5 Sensor
- MAF 3.5 Adapter
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 4” Elbow/clamps
- 3.5” to 3.0” reducer/clamps
- 4.0” to 3.5” Reducer/clamps
- Instructions
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E34 535i-P
Includes:
- MAF 3.5 Sensor
- MAF 3.5 Adapter
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 4” Elbow/clamps
- 3.5” to 3.0” reducer/clamps
- 4.0” to 3.5” Reducer/clamps
- Instructions
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M635csi-A
Includes:
- MAF 3.5 Sensor
- ARC2-A Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 3.5” to 3.0” reducer/coupler/clamps
- EGO1 Oxygen Sensor
- Weld Bung
- Instructions
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M635csi-P
Includes:
- MAF 3.5 Sensor
- PSC1-004 Air/Fuel Calibrator
- MAF Wire Harness
- ARM1 Air/Fuel Meter
- 3.5” to 3.0” reducer/coupler/clamps
- EGO1 Oxygen Sensor
- Weld Bung
- Instructions
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