Turbo sizing for 2.0 engine

[spdracer@mail.utexas.edu]

Compressor maps aren't hard to read.  The only part you have to figure out is
how much air your engine flows (which is proportional to HP).  But the Y-axis
is boost pressure and the X-axis is the airflow.  Compressor maps
show "islands" of efficiency with each island being roughly a circle.  So at a
certain boost pressure and airflow, you'll fall on one of these islands and
that tells you the compressor efficiecy at that point.  There's also lines
telling you the compressor rpms.  The higher the efficiency, the better because
it means that the air isn't being heated up as much relative to a lower
efficiency.

Khiem