What is a Ford 351M engine?
351M production began for the 1975 model year and blocks were cast in the Michigan Casting Center or the Cleveland Foundry. The 351M was the last pushrod V8 block designed by Ford until the introduction of the 7.3-liter “Godzilla” engine for the Super Duty trucks in model year 2020.
What was the last year of the 351M engine?
The 351M was essentially a destroked version of the 400 c.i.d. engine. The 351M and 400 were available in cars until 1979. They were also offered in trucks until 1982.
Is a Ford 351M a big block?
The 351 Windsor is a small block. If memory serves it has a taller deck height than the 302 but is otherwise very similar. So a couple things: There is no set of rules for what constitutes a small block or big block.
What does 351M mean?
351 Modified 351 Modified Engine. The 351M is part of the same Ford 335 V8 engine series as the 351 Cleveland. It’s based on the 400 Modified engine (see note on nomenclature in the opening paragraph), which was essentially a 351C with a longer stroke.
How do I identify a Ford 351M engine?
The 351M and almost all 400’s have the large bell housing pattern like the 429/460. The only 100% positive way to tell if you have a 351M or 400 is to drop the oil pan and check the casting numbers on the crank. They should be on the side of the first counterweight. A 400 crank will have 5M, 5MA or 5MAB casting code.
How do I get more power out of my 351M?
TRW use to make a flat top piston for the 351 M. The easiest way to make power is to replace the crank and pistons to a 400M. I believe the connecting rods are the same for both motors, but verify with a second source just to make sure. Any 351C aftermarket cylinder heads will work on the 351/400M motor.
What liter is a 351 modified?
The 351 cubic inch engines (both 351 Windsor and 351M) were referred to as 5.8 liters, and the 400 cubic inch engine was referred to as 6.6 liters.
What did the 351M come in?
The 351M was introduced in passenger cars in MY 1975. The 351M uses the same block and heads as the 400, with a shorter stroke crankshaft (3.50″), the same connecting rods, and a unique piston with a taller compression height to compensate for shorter stroke with the same rods in the same block.
What years did Ford make the 351M?
351M production began for the 1975 model year and blocks were cast in the Michigan Casting Center or the Cleveland Foundry. The 351M was the last pushrod V8 block designed by Ford until the introduction of the 7.3-liter “Godzilla” engine for the Super Duty trucks in the model year 2020.
How much horsepower does a Ford 400 have?
What is the difference between a Ford 427 428 and 429?…How much HP does a 400 Ford have?
| Model Year | Engine | Horsepower @ RPM (SAE net, except ’71) |
|---|---|---|
| 1978 | 351M (car/truck) | 152 @ 3400 / 156 @ 4000 |
| 1978 | 400 (car/truck) | 160 @ 3800 / 158 @ 3800 |
| 1979 | 351M (car/truck) | 151 @ 3400 / 156 @ 4000 |
| 1979 | 400 (car/truck) | 159 @ 3800 / 159 @ 3800 |