Centrifugal Superchargers ??!
 

Centrifugal Superchargers are really better with gas ? or that roots type superchargers are better ? which makes power faster ?

Roots blowers make power faster, as they generally offer instant or near instant boost. They have excellent torque from 2000RPM and up. Centrifugal blowers take longer to make power as they make boost in correlation with engine RPM. Due to this, I guess you could say that Centrifugal blowers are a bit easier on gas consumption, but it really depends on alot of other factors as well.
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