1938 LaSalle Production - GM Heritage Center

order, and the other supplies those with odd firing
numbers. Since no two successively firing cylinders
receive fuel from the same manifold, there is no chance
of one cylinder starving another. Manifold distances
from the centrally located carburetor are equal to all
cylinders improving fuel distribution and reducing the
possibility of condensation of gasoline in the manifold,
such as occurs in the long straight eight manifolds.
Equalized
Manifolds
A further precaution for complete vaporization and
fullest possible use of fuel is the "hot plate." Exhaust
gases are led under the intake so that these hot gases
are applied to the under side of the manifold. This
direct heat immediately vaporizes any raw gasoline
that may have dropped through to the manifold.
Exhaust
Manifold
Each cylinder block has three exhaust ports. The end
cylinders each have an individual port and the two
center cylinders of each block are siamesed into a
single port to supply heat to the hot plate in the intake
manifold. Passages from the two center ports are so
divided that part of the hot exhaust gases surge back
arid forth from block to block across the center of the
engine, thus heating the intake manifolds. The balance,
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