what is p-trim, o-trim, etc etc?
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From: n
Those are turbine wheel trims for Garrett T04 series of turbos.
They basically come in O-trim, P-trim, and Q-trim.
The turbine wheels gets larger from left to right.
An O-trim wheel should be avoided, as it's too small for a 13B.
The P-trim is the standard wheel for a 13B.
I have heard reliability problems with the Q-trim wheel, so I can't recommend them myself.  Maybe others can add their experiences?
Basically, you want the biggest wheel turbine wheel trim you can get.  Too small of a turbine wheel, and you choke the exhaust flow too much.
-Ted
They basically come in O-trim, P-trim, and Q-trim.
The turbine wheels gets larger from left to right.
An O-trim wheel should be avoided, as it's too small for a 13B.
The P-trim is the standard wheel for a 13B.
I have heard reliability problems with the Q-trim wheel, so I can't recommend them myself.  Maybe others can add their experiences?
Basically, you want the biggest wheel turbine wheel trim you can get.  Too small of a turbine wheel, and you choke the exhaust flow too much.
-Ted
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