How much horsepower does a ford 400 big block have?

Factory Power Ratings

History of the Ford 400 Engine

The 400 was used in many applications over the years. The 400 replaced the Ford 390, and It was designed for good acceleration for medium to heavy vehicles. The 400 is basically a stroked 351– it had the longest stroke in pushrod engines at the time.

The 400 was designed as High torque, low RPM engine That was a smaller, more efficient, and lighter alternative for the big Ford 385 engines, the 429 and 460, for use in Ford’s medium and large size cars.

The 400 was intended as a replacement for Ford’s aging Big-block Designs. The block’s architecture borrowed heavily from the Cleveland, including the bore spacing, but 1.09 inches of additional deck height were added to allow a 4.00-inch stroke and the potential for plenty of torque.

The 400 was intended as a replacement for Ford’s aging Big-block Designs. The block’s architecture borrowed heavily from the Cleveland, including the bore spacing, but 1.09 inches of additional deck height were added to allow a 4.00-inch stroke and the potential for plenty of torque.

Located on the passenger side of the block near the bell housing end of the block is the casting number.
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351M & 400 Identification

1. 1st number is the year.
2. 2nd letter is the month.
3. 3rd & 4th number is the day of the month.

Breaking in the Ford 400M Engine

Equipped with the stock two-barrel intake and Holley carb, the 400M produced peak numbers of 265 hp at 4,100 rpm and 412 lb-ft at 2,900 rpm. Torque production from the 400M exceeded 400 lb-ft from below 2,000 rpm (we didn’t load it lower than 2,000 rpm) to 3,200 rpm.

Factory Power Ratings

Ford called the engine 400 cu in but it actually displaced 402 cu in (6.6 L). To accommodate the longer stroke, Ford engineers increase the block deck height to 10.297 inches compared to the 351C’s 9.206 inches.

With 575 horsepower And 575 Lb. Ft. of torque, Z460 packs a pump gas fueled punch that works well on the street and on the track. The foundation of Z460 is the legendary Ford Performance Boss block topped off with high port/high flow Z-Heads.

400. The largest version of the Generation I small-block was the 400 (6.6 liter). It was the only engine available with both the 4.125-inch bore and the 3.75-inch stroke crankshaft. It debuted in 1970 and was produced for 10 years.

Big block engines are larger in size and weigh more, but they produce more consistent power and torque to overcome the weight. Small block engines are smaller for better acceleration and handling, but More recently built models can be just as powerful as big block engines.

The Pontiac Motor Division Built the 400 from 1967 through 1978. Although it found its way into many 1979 automobiles, those were actually purpose-built leftovers manufactured in 1978. Nevertheless, this is an amazing 12-year run at a time when car makers changed an engine’s displacement every few years.

The Ford Motor Company has built nearly every kind of V8 engine we can imagine over the past century, but the biggest was the 1100 CID GAA tank engine of World War II.

The all-new 2020 Mustang Shelby GT500 Will boast the most powerful Ford engine. This formidable supercharged engine will generate 760 horsepower and 625 pound-feet of torque. That means the revolutionary 2020 Mustang GT500 will be the most powerful street-legal Ford in history.

The 400 was introduced in 1971 As a longer-stroke variant of the 351 Cleveland, and it would be the last pushrod V8 engine ever designed by the Ford Motor Company.

The 351M/400 used the “Big Block” bellhousing bolt pattern.

In fact, the only functional difference between the 351M and 400 is the Crankshaft and pistons. Ford did use slightly different components in the 351M and 400, such as harmonic balancers, camshafts, and valve springs, but functionally, the engines were identical except for the crankshaft and pistons.

While the latest generation of 351 Windsors typically generated around 180-220 horsepower From the factory, adding a new set of heads, a larger cam, and some other aftermarket parts can get a Windsor with the stock stroke to around 350-400 horsepower easily.

351 Modified

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. Unlike the 351C however, the 400 blocks had the bellhousing bolt pattern of 385-series big blocks. It also had a higher deck height to accommodate the longer stroke.

Note that Heads are interchangeable between all Cleveland and 400, 351M engines.

What Are the Specs of the Ford 460 Crate Engine? The Ford 460 crate engine – the Z460 – makes 575 horsepower And 575 lb. -ft. of torque.

The Ford 400 engine was based on the 351 Cleveland. It had a half-inch (12.7 mm) longer stroke than the 351 Cleveland, making it the longest-stroke Ford pushrod V8 engine. The 400 had “square” proportions, with a 4.0 in (102 mm) bore and stroke.

This Ranchero was black with a green interior. 351 V8 was powerful and reliable. It handled well for a truck, and the disc brakes worked very good.
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General Comments:

“The 351W is a basic 302-type engine. The 351C engine got all the hype, but what we race today is the basic W or a combination of the two. The W is a better engine for long-lived low RPM power. It needs proper preparation to race, and, as it has the better torque curve on the low end, it is not a high rpm engine.