Originally Posted by
Moonstone Steve
lets not forget that as far as i'm aware Steve's T38 is a T4 without the two part exhaust housing.
Steve
The April 2005 issue of Fast Ford compares the two in full detail
Compressor spec:
T38 ........ 73MM, 60 TRIM ........ T31 HOUSING, 0.63 A/R
T4 ........ 76MM, 56 TRIM ........ T31 HOUSING, 0.63 A/R
The turbine wheel on the T38 has more acute angles to the T4