1938 LaSalle Production - GM Heritage Center

simple and positive in operation and eliminates oil
dilution due to overchoking.
The Cadillac carburetor also has a new vacuum
actuated economizer. This mechanism enriches the
fuel mixture whenever power is required, even though
the throttle is not fully open. Also, this improved design
makes possible a leaner mixture for greater fuel
economy.
Cadillac
Carburetor and
Electric Choke
Another feature of efficient Cadillac carburetion is the
concentric design of the fuel chamber. This design eliminates
tendencies toward vapor lock, common to many
carburetors, by utilizing the cooling action caused by
the evaporation of gasoline in the air stream passing
down the carburetor throat. Fuel stored in the carburetor
completely encircles the carburetor throat. By
keeping this fuel constantly cool, rapid evaporation
in the carburetor mixing chamber is avoided. Smoother,
faster performance and more economical operation is
attained in hot weather driving. The pronounced cooling
effect resulting from evaporating gasoline may be
easily demonstrated by placing a small amount of
gasoline in the palm of the hand.
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