This is the
T4 .70AR Garrett turbine
(Top) vs the
14cm holset(
bottom)
The
inlet on the Garrett T4 .70AR housing is obviously bigger than the opening on
all the T3 turbos but after the inlet when I compare the body of the
T4 .70AR Garrett to the
T3 14cm housing, the 14cm dimensions and volume
look much bigger than this large inlet T4 .70 AR Garrett housing,
but this is not to necessarily say the 14cm housing flows more than the T4 .70AR garrett housing.
I would go out on a limb and dare to say that the T3 14cm Holset housing would be somewhere between a
.70 AR and .80 AR divided garrett housing especially when I also compare the 14 cm T3 holset housing to the divided .84AR Garrett T3 housing. It's not as big as the Garrett.84 but close