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Originally Posted by stileguy
doesn't the ecu sense load via the output voltage from the hot wire mass air flow meter?
the factory ecu measures the air entering the engine, not the boost pressure, the map sensor is only used for boost cut purposes, so the load axis is actually cfm not psi.
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Anyone know for a fact which is correct?
I'm from the DSM (eclipse turbo) world where this is how things work. I'm trying to understand what makes the STi ECU different. Everyone talks about needing new maps for every little change. On my eclipse as long as you had a big enough fuel pump and injectors you could throw on any size turbo, downpipe, exhaust, whatever and not have to make any tuning changes (mostly).
