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Here is a simple explanation:
The MAF sensor sends a voltage signal to the ECU. The voltage signal changes with air flow - at low air flow volume the voltage is low - conversely at high air flow the voltage rises.
Nissans uses a 1-5 volt reading. There is a "hot" wire located in the MAF. It is this wire that changes the voltage reading the computer sees and thus uses this data to change the fuel flow in percent of duty cycle (how long the injectors are open per spray).
To keep a turbo motor happy, you need to make sure you are not flowing more air through a MAF than it can register withing the above stated voltages, and you need to "see" what the duty cycle is for your injectors. There are lots of very knowledgeable folks on this forum, both past and present who have covered this topic with reams of good information and thousands of posts.
I knew nothing about turbo cars, but before asking the same questions that have been coverd for years, I simply read and read.
I now have a very dependable ride that is very fast - and I've meet my initial goals and know where to draw the line and be realistic about my "dreams" versus reality.
So if you still don't understand all this stuff, as many here say - search and read - then ask those specific questions you REALLY cant find an aswer to.
Best of luck in what ever you choose to do.
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297 whp and 300wtq
Daily driver - 1992 SE-R (A.K.A. The Lemon Drop...it's CRAZY yellow!  ) w/bone stock GTi-r engine
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