Is the Pontiac 400 a good engine?

Is the Pontiac 400 a good engine?

Performance. The Pontiac 400 engine was used as a high performance engine in sports cars, and it was used in large cars as a workhorse type engine, strong on power, though not as speedy as the higher performance engines. This was accomplished to a large extent by the use of carburetors.

What liter is a 400 Pontiac motor?

The Pontiac 400 6.6 Liter engine was first introduced in 1967. This version of the Pontiac V8 engine was used in the GTO, Firebird, and the Trans-Am Firebird. The 400 was inspired by the Pontiac 389 V8 and proved to be the last Pontiac engine with closed chambered heads.

How do I identify a Pontiac 400 engine?

As you look there you may find a pretty simple clue that will end your engine identifying search. On 1968–69 428 blocks you will find “428” stamped between the freeze plugs. On blocks produced in 1970 and after, you will find 350, 400, or 455 stamped towards the left side of the front of the block.

How much horsepower can you get out of a 400 small block?

With timing and jetting maximized, the 400 managed to produce 458 lb-ft of torque at a still low 4,000 rpm, while kicking up the peak horsepower to just 401 at 5,400 rpm.

Is Pontiac 428 a good engine?

The 428 was Pontiacs top engine for 3 short years- 1967-9. The bore is the same as the 400 at 4.12″. The stroke is 4″, the main journals are 3.25″. The 428 has remained one of the favorite Pontiac engines for racers and hot rodders and, are always one of the most sought after for a build up.

Did Pontiac make a 421?

Immediately Pontiac was back on top. It was offering an over-the-counter motorsport weapon system that would come to be known as the 421 Super Duty package. Engine production started in 1961. At first it was a race-only drag car upgrade, but it grew into a complete car for buyers in the know.

How do you rebuild a Pontiac 400?

Insert Rear Seal. With the engine back on an engine stand,install the rear main seal.

  • Pack the Seal. A number of tools can be used to pack a rope rear main seal into the groove,including a large socket,a length of steel
  • Install RTV Sealer.
  • Reinstall Formed Rope Seal.
  • Cut Rope Seal.
  • Apply RTV Sealer.
  • What year did GM stop making the 400 engine?

    The 400 CID Chevy small block engine was produced from 1970 until 1980 and was the largest displacement engine made in that platform. It was intended as a low performance, high-torque engine primarily used in Chevy’s heavier passenger cars and light-duty trucks.

    Is a Pontiac 400 a big block?

    Speaking of which, this Trans Am no longer relies on a Malaise-Era engine for oomph. Instead, it packs a Chevrolet 427-cubic-inch (7.0-liter) big-block V8 with a ton of upgrades. Bored .030-inch over, it sports a forged-steel crankshaft, forged rods, and a Cam Dynamics hydraulic roller camshaft.

    What is horsepower rating on a Pontiac 400?

    The 400 was inspired by the Pontiac 389 V8 and proved to be the last Pontiac engine with closed chambered heads. At the start of the 1970s, the 400 V8 generated more than 300 horsepower, but decreased to 180 horsepower by the time the last 400 engine was produced in 1978.