Hey all

I don't have a turbo setup but there is something I have been curious about and that is how the standard map sensor can handle any boost at all, The max of the map sensor is about 14psi which is the pressure you find at sea level, Now I assume when you are running say 5 psi of boost that is 5 psi on top of the atmospheric pressure wouldn't that not go outside the ability of the map sensor ?. Also the ecu monitors the manifold pressure and rpm etc to work out the load and how much air is going in so wouldn't forcing air in there mess with these calculation as it would assume the load is less than it may actually be ??

I know this works as people have stock ecu's running boost I would just like to get my head around how it works.

Thanks to anyone who can help

YEP std maps are 1 bar [14.7 Lb].. Atmo at sea level is 1 bar...
It seems they work up to 8Lb then they think there is a backfire
and cut fuel..
Even stand alone ECUs with 1 bar map is for n/a applications..