Okay so I was looking for an intake and I noticed that certain ones come with MAF sensors and some don't. Now I thought my Evo 9 came with a MAP sensor and I've heard before that you either have a MAP sensor or a MAF sensor. So my main questions are

What is the point of having a MAF sensor? and will I be okay without one?

 

Your car will run poorly if you remove your MAF sensor unless you convert to speed density.

 

I thought Evos came stock with MAP sensors not MAF sensors?

 

Bingo! Your car will idle erratically, will drive extremely rough, and may randomly stall out. Converting to speed density will eliminate these symptoms.

 

We have MAP sensors and MAF sensors.

 

So we have both? And what does it mean to convert to speed density?

 

Oh okay thanks, so how come they sell cold air intakes without MAF sensors?

 

The MAF sensor is mounted in on your intake prior to the turbo and it senses barometric pressure, humidity, et cetera and sends that information to the ECU which determines how much fuel is needed at any given time (whether it's a humid day, cold day, dry day, hot day, or driving in the mountains of Colorado) . The MAP sensor is mouted on your intake manifold and it determines how much air is being pulled into the engine by how much pressure is measured inside the intake manifold.

 

https://www.evolutionm.net/forums/ec...d-density.html

You'll need a MAP sensor and a tuner. The JDM 3 bar MAP sensor seems to be the weapon of choice. I have the Omni 7 bar MAP sensor though.

 

Thanks, I understand now.