Quick Answer: How Much Does A Pontiac 400 Block Weigh?

What Pontiacs came with a 455?


The Pontiac 455 V-8 was actually a bored out 428-cubic-inch V-8 with a bore and stroke of 4 inches by 4 inches.

For the 455, Pontiac expanded the cylinder bore to 4.152 inches and the stroke to 4.21 inches.

The 455 powered the Pontiac GTO and Firebird..

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.

How much does it cost to rebuild a Pontiac 400 engine?

There are those of us who have rebuilt a 400 or 455 from an engine core, so we know what a quality rebuild costs- you’re going to spend $1500-2000 on parts alone and another $750-1000 on machine work (figure another $800-1500 for professional assembly).

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.

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.

Are all Pontiac blocks the same?

The blocks of all Pontiac V-8s from the 287 to the 455 are the same size and very close to the same weight, which can make it more difficult to identify the 11 different engine displacements produced from 1955–79. Adding to the confusion, multiple block codes were used, and date codes can overlap up to three decades.

What does GTO stand for in the Pontiac?

Gran Turismo OmologatoThis ritual is summarized by the three most famous letters ever worn by an automobile: “GTO” stands for “Gran Turismo Omologato,” which, loosely translated from the Italian, means homologated (recognized for competition) grand-touring car.

Is a Pontiac 400 considered a big block?

Ford 332 (5.4 litre) Interceptor big block V8. A Chevrolet Camaro 396 had a big block, but a Pontiac Firebird 400 did not. Buick and Oldsmobile 455s were big blocks, but a Pontiac 455 was not.

Is Pontiac 455 and 400 the same block?

The 400 and 455 blocks share the same size externally, but they are two different blocks internally. The 400 has a 4.12″ bore and the 455 has a 4.151″ bore, but the most you can go is 4.18″ on the 400- also a good idea not to go beyond .

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!

How much does a Chevy 350 motor weigh?

Depending on how many accessories you leave on the engine, it should weigh about 575 pounds.

How much horsepower does a Pontiac 400 have?

360 horsepowerThe 389 posted numbers in the 330 horsepower range with a single spread-bore, four-barrel carburetor. The 400 pushed this number up to 360 horsepower, with the same Quadrajet single four-barrel. What sets this engine apart in the history books is the factory-installed high-performance Ram Air systems.

How much does a Pontiac 400 engine weigh?

630 lbsA complete 400 dry weighs approx 630 lbs.

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.

Did Pontiac make a 428 engine?

The Pontiac 428 cubic inch engine was used only from 1967-69. It was one of the largest engines Pontiac produced, but it was used more to power big cars such as the Bonneville, and not as much for performance cars such as the Firebird.

Is Pontiac and Chevy the same?

Established in 1926 as a companion brand to General Motors’ Oakland, Pontiac quickly outgrew its companion to become the sister brand of Chevrolet. For most of its existence, Pontiac was marketed as the performance division of GM for many years, selling performance-oriented vehicles for the mainstream.

Did Pontiac make a small block?

Pontiac did not have the customary “small-block” and “big-block” engine families common to other GM divisions as well as Ford and Chrysler.

Is a Pontiac 389 a big block?

There is no Pontiac big block or small block. they have the same physical demensions. You can take a 455 and drop it right into that 60 pontiac.