FordNut
03-13-2004, 07:13 PM
I got the MAF sensor and have performed my preliminary analysis. Not installed yet, just observations and measurements.
It looks like a well-built free-flowing unit. The sensor works differently from the OEM one in that there is no sensor sticking down in the air flow path. The internal geometry is also different. The OEM unit is 80 mm basically through the entire length (it bells out slightly at the inlet but not much). The Pro-M unit smoothly necks down from a large inlet opening to 80 mm but then gets larger to about 95 mm and stays that larger size to the outlet flange.
The larger outlet flange will not connect directly to the intake air tube. It comes with a rubber boot which is used to connect the outlet flange to an included aluminum reducer cone which then connects to the air tube. So the nice large 4" outlet flange is reduced to 3-1/2" so it can connect to the air tube. It appears that the size of the conical air filter is such that the intake air tube will be bent downward for the filter to clear the closed hood.
The sensor element(s) are not as I had expected. The OEM unit has combined MAF sensor and IAT sensor. The Pro-M uses a separate IAT sensor which is included with the kit, along with the electrical connectors needed to change the OEM harness connections. But where does the IAT sensor mount? Since there is no airbox, this is going to simply measure engine compartment temp.
There is no mounting bracket for the MAF sensor or the IAT sensor, so I'll have to figure out some mounting scheme for both, at least for initial performance testing. I'm not going to install it permanently until I build a new air box or cold air kit for it.
So this changes some of my plans. I had intended to make a carbon fiber air tube and at some later time to build a carbon fiber air box/cold air kit. The IAT sensor issue changes the priority of those two projects. I need a place to mount it and isolate both the inlet air and the sensor from engine compartment heat. So the air box is first. I had planned to make an intake tube which could be used on both the OEM and the Pro-M MAF sensors. But the changed angle, larger flange size, and different length which would be necessary to eliminate the adapter flange mean that it would not be interchangeable.
It looks like a well-built free-flowing unit. The sensor works differently from the OEM one in that there is no sensor sticking down in the air flow path. The internal geometry is also different. The OEM unit is 80 mm basically through the entire length (it bells out slightly at the inlet but not much). The Pro-M unit smoothly necks down from a large inlet opening to 80 mm but then gets larger to about 95 mm and stays that larger size to the outlet flange.
The larger outlet flange will not connect directly to the intake air tube. It comes with a rubber boot which is used to connect the outlet flange to an included aluminum reducer cone which then connects to the air tube. So the nice large 4" outlet flange is reduced to 3-1/2" so it can connect to the air tube. It appears that the size of the conical air filter is such that the intake air tube will be bent downward for the filter to clear the closed hood.
The sensor element(s) are not as I had expected. The OEM unit has combined MAF sensor and IAT sensor. The Pro-M uses a separate IAT sensor which is included with the kit, along with the electrical connectors needed to change the OEM harness connections. But where does the IAT sensor mount? Since there is no airbox, this is going to simply measure engine compartment temp.
There is no mounting bracket for the MAF sensor or the IAT sensor, so I'll have to figure out some mounting scheme for both, at least for initial performance testing. I'm not going to install it permanently until I build a new air box or cold air kit for it.
So this changes some of my plans. I had intended to make a carbon fiber air tube and at some later time to build a carbon fiber air box/cold air kit. The IAT sensor issue changes the priority of those two projects. I need a place to mount it and isolate both the inlet air and the sensor from engine compartment heat. So the air box is first. I had planned to make an intake tube which could be used on both the OEM and the Pro-M MAF sensors. But the changed angle, larger flange size, and different length which would be necessary to eliminate the adapter flange mean that it would not be interchangeable.