Originally posted by Stazi:
This is a very weird statemnt. I don't think engines really respond differently to boost because of how it was made; 5psi out of a turbo is 5psi out of an S/C if they are both at the same temp and flow.


Yes, 5psi is 5psi (all conditions being equal - i.e. the same engine). The difference is in where the boost is coming in. If you have an engine with low end torque and falls off high (read Ford 302 [well, stock]) then something with a linear increasement in CFM would be better suited to it where as a positive displacement blower would increase low end torque and demand more of the chassis in putting the power down.
A small four cylinder with low low end torque can really come alive with a positive displacement blower (i.e. Jackson Racing) and a centrifugal blower would have to wait longer to add significant gains.
It's all about the power under the curve.

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