Quote Originally Posted by CRXer View Post
MAP is manifold "absolute" pressure,meaning read from perfect vaccuum=0psi

atmospheric is already 14.7 psi of your map sensor=1bar

14.7psi boost=atmo + 14.7=2 bar
29.4psi boost=atmo + 29.4=3 bar

u can get a 2.5bar,but thats not leaving u much headroom ontop of 20psi,so id just get the next size,but thats up to u.
Ahhh k,

yep so i will need a 3bar map sensor.