1938 LaSalle Production - GM Heritage Center

The concentric designed fuel chamber also makes
carburetor efficiency entirely independent of the grade
of the road or degree of acceleration or deceleration.
Gasoline is permitted to rise at the rear of the fuel
chamber when ascending a hill or accelerating, and
to drop a corresponding amount at the front of the
chamber without affecting the relative level of gasoline
in the nozzle. Proper flow and correct mixture of fuel
from the carburetor is maintained with consequent
economy and smoothness.
Air Intake
An oil bath air cleaner filters all air before it enters the
carburetor, insuring a pure fuel mixture. This elimination
of impurities in the air prevents scoring of piston
and cylinder walls.
This type of cleaner is far more effective in handling
large quantities of dirt than the conventional wire mesh
type. Air rushing into the cleaner passes over a reservoir
of oil creating an oil mist. Much of the dirt is held on
the surface of the oil in the reservoir and the balance
caught in a filtering element. All dirt adhering to the
filter is washed into the reservoir by the oil mist. This
keeps the filter clean and at maximum efficiency.
The air cleaner intake is at the forward part of the
engine where it receives cool air directly from the fan.
Cool air is heavier and has greater explosive qualities
than hot, light air. The air intake is scientifically tuned
to silence the sound of inrushing air to the carburetor.
Intake
Manifold
Cadillac's uniquely designed intake manifolding insures
equal fuel distribution to all cylinders. Two separate
intake manifolds are cast into one unit. One manifold
feeds the four cylinders numbered evenly in the firing
• 55»