I have a rpi 5
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I have a rpi 5
On the RPI site is says this doesn't need to be rescaled , but its my understanding that you should see anywhere between 35-40 g/s at idle. So my suggestion would be to datalog your MAF rate and figure out the scaling factor you need to get it to read around 37g/s since you increased the size of the intake the velocity of the air is slower therefore the readings are probably lower so you would need to multiply the MAF scale by the scaling factor in order to get the correct readout. Before you do all this make sure the MAF is clean and that all the clamps are tight to ensure that the sensor is getting the correct readings. I'm sure someone will correct me if I am wrong, but this has worked for me in the past.