How Much HP Does A Pontiac 400 Have?

How much horsepower can a Pontiac 400 make?

The major components of the build up include a ’67 GTO 400 block previously freshened up by Kevin.

It was punched 0.035-over and stuffed with a 4.210-inch stroke crank….Engine Buildup WorksheetEngine Displacement463Horsepower650Torque596 lb-ftBore/Stroke4.185/4.21-in4 more rows•Sep 1, 2008.

Is a Pontiac 400 the same as a Chevy 400?

Ehhhhhhhhhhhh, the Pontiac 400 has the same bore and stroke as the 400 chevy. It has 3 inch mains that soak up 80hp from the overall flywheel horsepower figure, not!

What is the difference between a Pontiac 400 and 455?

The significant difference internally between the 400 and the 455, as you probably know, is the diameter of the main bearing journal on the crank – the 400 being 3.000″ and the 455 being 3.250″.

What did a 400 small block come in?

The 400 small block Chevy was produced from 1970 until 1977. It was originally installed in big sedans and wagons, but later found its way into some trucks. I don’t believe it was ever put in the Chevelle or Camaro. A co-worker has a very healthy 400 in his ’88 Corvette.

How much horsepower does a Pontiac 455 have?

The result was the 1970 Pontiac GTO 455, which was stuffed with a beefy 455 HO V8 long-stroke engine. Rated conservatively at 360 horsepower and producing a tremendous 500 pound-feet of torque, the 455 HO gave the GTO the powerful aggression needed to appeal to performance-minded buyers.

Is a Pontiac 400 a good engine?

Because of its place in Pontiac’s most brutal and outlandish muscle cars as well as fighting the good fight into the era of smog-choked, low-compression lameness, the Pontiac 400 remains one of our favorite V-8 engines.

Is a Pontiac 400 a big block?

Then there are the big blocks which is an entirely different casting and is bigger in physical size when compared to the “small” blocks. Some big block sizes are 396, 427, 454, 502, etc. Notice the “Small” block family has a 400 and the “Big” block family has a 396. Again cubic inch is NOT the deciding factor.

Is Pontiac 455 and 400 the same block?

He advises, “With the exception of the mid- to late-1970s PN 500557 casting, we consider all Pontiac 400 blocks functionally identical. The 455 blocks from 1970 to 1976 are also functionally identical.

Is a 400 small block better than a 350?

A small block 350 and a 400 have an identical block design. Most accessories will fit either engine. The major difference is found in the casting numbers and the way they are balanced. Most 350 cubic inch engines are internally balanced whereas the 400 engines are not.

How much is a 1968 Firebird 400 worth?

Pontiac ModelsEnginesMedian Sale400 CID | 330 HP$23,500428 CID | 375 HP$30,875350 CID | 320 HP$18,750400 CID | 335 HP3 more rows

What is the best Pontiac?

A Tribute to the Best of Pontiac1958 Bonneville. A child of the Atomic Age, the ’58 Bonneville brought real engineering substance (fuel injection, air suspension, four-speed automatic) along with its spacecraft looks. … 1964 GTO. … 1977 Firebird Trans Am. … 1987 Bonneville SE. … 2008 G8 GXP.

What is the biggest Pontiac engine?

The 455-cu.in. V-8 debuted in 1970 and was the largest displacement Pontiac engine ever built for the street.