terminology and turbo questions

[Aaron Ryba]

What does the term "short-block"refer to?
And then,...... "long block"
is there a "tall block"?

Also,  the psi rating of a turbo....
Is this the pressure on the turbo outlet, pushing into
the intake?
Or, is this the pressure of exhaust acting on the
turbo spooling fins?

I notice that the wastgate spring is denoted by
pressure (psi or bar).
Does the wastegate spring controll the amount of
pressure the turbo can spool up to?
I.E,.. getting a stock system to spool from a factory
set 6psi to get to about 12 psi only requires a
wastgate spring change????  is this right?

could someone please clarify
TIA

Aaron Ryba
87 4kcsq 106k

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