What is a 351m400?
What is a 351m400?
A 351m is just a modified 400 due to back in the late 70s ford was trying to reduce emmisions, so they took a 400 made some internal changes, like crank shaft, timming etc., it is still called a big block, and loves the gas.
Is the 351C the same as the 400?
Most Ford enthusiasts are well aware of the 351 Cleveland engine, and its short, but well known, history. However there is confusion regarding the 351M and 400 engines. The 351M and 400 engines were derived from the 351C, and are all considered part of Fords “335 series” of engines.
What kind of engine does a Ford 351 Cleveland have?
When the 351 Cleveland was discontinued after the 1974 model year, Ford needed another engine in that size range, since the production of the 351 Windsor was not sufficient. Ford took the 400 engine’s tall-deck block and de-stroked it with a shorter 3.5 in (89 mm) stroke crankshaft to produce a 351 cubic inch (5.8 L) engine.
Where did the 351M engine get its name?
It appears that Ford decided to tack a letter suffix on to the cubic inch, and that letter was taken from the foundry where the engines were, for the most part, cast – Cleveland and Windsor.
Are there exhaust ports on a 351M engine?
Similar plates are available for the exhaust ports on the 4V heads. For a 351M or 400 motor, the 4V heads offer a double edged sword. If they are closed chamber, they can raise compression significantly, however this comes at the expense of large ports and poor atomization and velocity.
Most Ford enthusiasts are well aware of the 351 Cleveland engine, and its short, but well known, history. However there is confusion regarding the 351M and 400 engines. The 351M and 400 engines were derived from the 351C, and are all considered part of Fords “335 series” of engines.
Is the Ford 351M the same as the Cleveland?
Interestingly, the 351 Cleveland built such a strong performance reputation and market appeal that Ford referred to the 351M as a “351 Cleveland” in their own marketing literature for at least the first couple years after the 351M was introduced.
It appears that Ford decided to tack a letter suffix on to the cubic inch, and that letter was taken from the foundry where the engines were, for the most part, cast – Cleveland and Windsor.
Similar plates are available for the exhaust ports on the 4V heads. For a 351M or 400 motor, the 4V heads offer a double edged sword. If they are closed chamber, they can raise compression significantly, however this comes at the expense of large ports and poor atomization and velocity.
