Originally posted by JZ 97 SS 1500
As far as wheel trims are concerned. Here are the specs below expressed in, Exducer/Major
N-trim = 2.07/2.92
O-trim = 2.29/2.92
P-trim = 2.54/2.92
Q-trim = 2.69/3.11
R-trim = 2.85/3.20
S-trim = 2.96/3.20
Those are your typical exhaust turbine wheels. Some others are out there, like the master power units which use a little different variation in some of their units, but that covers 99% of your turbos out there.
Jose