[JSchmitz]

Originally Posted by JLMounce

I don't know how much actual efficiency you'd be gaining from this configuration. A centrifugal supercharger should also have a boost bypass valve installed that is connected to vacuum. While under low load, the head unit is essentially freewheeling as the bypass valve is open. While in that operational state the parasitic losses of driving the supercharger are negligible.

In a carbureted application, you would then only deal with whatever driveability concerns are inherent with the blow through application.

Mad Max supercharger was a roots blower. Different animal than centrifugal. I believe there are bypass systems on newer screw type blowers. Admittedly, I'm not well educated on the subject. Was compelled to comment anyway. lol

[JLMounce]

Originally Posted by JSchmitz

Mad Max supercharger was a roots blower. Different animal than centrifugal. I believe there are bypass systems on newer screw type blowers. Admittedly, I'm not well educated on the subject. Was compelled to comment anyway. lol

Yeah, OP was using that as an example but is using a centrifugal blower.

Even some more modern roots blowers like the m90 and m112 have built in boost bypass for cruise operation. Almost anything being used in an oem application will.