Originally Posted by suby25
The factory map sensor for the EJ20G can only accurately measure up to ~17 psi. If you use the Power FC to control boost and want to run more than the map sensor threshold pressure, you will either need to use the Apexi boost control kit or another form of boost control (manual, electronic...). That's the only reason to use it.
I'm just curious that's why I'm asking but why wouldn't you just use the GM 3 bar map sensor or a different aftermarket one, since can calibrate the Power FC to any map sensor? Much cheaper than the boost control kit.