Re: map sensor + boost?
The map sensor itself is will accurately report upto 15 odd psi. The ECU however has no concept of boost. You can run about 6 psi with the stock ecu if you push enough fuel in and it will manage, but even still you are better off getting an aftermarket ECU and tuning it properly.
Heritage Green EF GLi
5 Speed, Wade 1521a, Headwork, Superlows, MS2 running fuel and spark