Boosting up - Use 2 or 3 Bar MAP sensor??

[JA2Z]

Hi Guys,

I'm currently running a Blower with a pulley that only gives me about 2.5psi (which actually gives me only 1.5 psi Positive Boost because without the blower the Boost/Vac reading at full throttle under full load is 2 inches Hg below 0 and with the blower on, it pushes the reading up to 1.5 psi

long story short.... I want More

so... I've Got Super6 Injectors and am making a pulley to suit somewhere between 8-12 psi positive Boost.

Question is:

Can i use a 3 Bar MAP sensor, or should i really be running a 2 Bar MAP sensor?

[scouser king]

Use a 2bar map sensor:
1 Bar MAP sensors are used on NA(naturally asperated) vehicles.
2 Bar MAP Sensors are used on forced induction vehicles(Turbo & Supercharged). They can measure up to 2x the apmospheric pressure(29.4psi), so that means it can measure up to 14.7psi boost(the atmosphere is 14.7psi + 14.7psi from the turbo/supercharger).
3 Bar MAP sensors can measure up to 44.1psi, which translates to 29.7psi boost from a Turbo/superchargerHope this Helps

[JA2Z]

Thanks Scouser, that's what i thought. you've answered my question

[delcowizzid]

yeah 3bar is just overkill and causes loss of resolution in the tune most times

[scouser king]

its all good mate