I've found two ways to eliminate using a flange adapter when going to a 94/95 MAF.
Option 1 - Get your hands on a 93 Cobra MAF housing and swap in the 94/95 sensor. I've had both and made some measurements using telescoping gauges and calipers. They are as follows:
Inlet ID = 3.25 in. for both units
Outlet ID = 2.95 in. for both units
Sampling Tube ID = .395 in. for both units
Sampling Tube OD = .640 in. for both units
In both cases, the smallest ID I could measure was 2.90 in (74 mm), but it actually gets slightly smaller (70 mm I assume) but I couldn't get anything in there to measure it. Anyways, it's obvious that the center section and sampling tube section of these two units both use the same casting and I see no geometry that says a 94/95 sensor would not work. 93 Cobra housings often go real cheap on ebay because no one has a use for them. I imagine you could buy one cheaper then a flange adapter and have a much cleaner setup.
Option 2 - Machine away the flange. Since I have access to a machine shop I clamped my 94/95 unit to a rotary table and milled away. The only time consuming part was centering it on the table. I don't think the casting is a perfect circle (I could only get it within .014 in. using a dial indicator). Finished pics (after some quick sanding and paint) are below. Notice in the last pic I cleaned up the casting seem lines on the interior.
And incase anyone is making modifications or looking for couplers, the inlet OD is 3.50 in. and the outlet OD is 3.00 in.
Option 1 - Get your hands on a 93 Cobra MAF housing and swap in the 94/95 sensor. I've had both and made some measurements using telescoping gauges and calipers. They are as follows:
Inlet ID = 3.25 in. for both units
Outlet ID = 2.95 in. for both units
Sampling Tube ID = .395 in. for both units
Sampling Tube OD = .640 in. for both units
In both cases, the smallest ID I could measure was 2.90 in (74 mm), but it actually gets slightly smaller (70 mm I assume) but I couldn't get anything in there to measure it. Anyways, it's obvious that the center section and sampling tube section of these two units both use the same casting and I see no geometry that says a 94/95 sensor would not work. 93 Cobra housings often go real cheap on ebay because no one has a use for them. I imagine you could buy one cheaper then a flange adapter and have a much cleaner setup.
Option 2 - Machine away the flange. Since I have access to a machine shop I clamped my 94/95 unit to a rotary table and milled away. The only time consuming part was centering it on the table. I don't think the casting is a perfect circle (I could only get it within .014 in. using a dial indicator). Finished pics (after some quick sanding and paint) are below. Notice in the last pic I cleaned up the casting seem lines on the interior.
And incase anyone is making modifications or looking for couplers, the inlet OD is 3.50 in. and the outlet OD is 3.00 in.