terminology and turbo questions

[JShadzi at aol.com]

<< Also,  the psi rating of a turbo....
 Is this the pressure on the turbo outlet, pushing into
 the intake?>>

Well, turbos are not rated for psi per se, but typically the actual psi
output is measured in the intake manifold where it counts.

<< Or, is this the pressure of exhaust acting on the
 turbo spooling fins?  >>

No, that pressure is typically not measured, as what is really important is
in the intake manifold.

Javad