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Changing the supercharger pulley to a smaller
diameter will NOT increase boost. Boost is limited by the
ECM, changing to a smaller pulley will only wear out
the S/C oil seals quicker. <br> The MAP (Manifold
Absolute Pressure)sensor sends a signal to the computer to
open the Bipass Air Control Valve when the intake
manifold pressure<br>is 28 PSI Absolute or 12 psi Absolute
(6" vacuum). Therefore boost will never exceed 14 psi
(atmosphere) no matter how fast the compressor turns.
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