another one of my little questions..........

just changing to cossie management on my erst engine. got most bits but wondering.............. do i really need a 3 bar map sensor? would a 2 or 2.5 bar map sensor not be adequate??

i may be miles off but guessing they got summat to do with the boost you can run? i dont wana be using more than 20-22psi as i want the engine to last! its making 190 at the wheels at 16psi and its been reliable for 16-18mths (grabbing wood with everything i can!)

3 bars like 42psi aint it, thats y im wondering if i need it

thanks

adam