Discussion in '1947-1954' started by wokri, Aug 11, 2020.
how much Rpm should the engine idle run?
You didn't say what year your 235 is, but this page 1954 Chevrolet Truck Shop Manual
from the 1954 Chevrolet Truck Shop Manual says 450-500 RPM.
which side in the manual?
In general, as long as there's oil weeping from the holes in the rockers you have sufficient idle speed .
Slow idle uses far less ful and gives far better engine braking if you're actually driving your old truck .
If not, up to 1,000 RPM's but I prefer 450~500 RPM unless the engine is work out enough to foul the spark plugs ~ then you have to tune it more sharply and will be wanting at least 700RPM....
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