How much HP does a Pontiac 455 have?

How much HP does a Pontiac 455 have?

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 the Pontiac 455 a good engine?

Despite only two years in production run, the 455 H.O. is regarded by many Poncho experts as the most versatile street engine Pontiac ever produced. Gobs of low-rpm torque make it quite responsive in normal driving conditions, and it can instantly turn tires into a smoky haze by standing on the throttle.

What Pontiacs came with a 455?

The 455 powered the Pontiac GTO and Firebird.

What is Pontiac’s biggest motor?

Big, Bigger, Biggest Pontiac’s 428 was found primarily in full-size sedans and coupes, and when the mid-size GTO was up for a replacement motor the company’s engineers created the 455 by boring the Super Duty engine to 4.1525 inches and using a crankshaft with a 4.21 inch stroke.

How much horsepower can you get out of a 455 big block?

Big-block Olds engines are famous for making torque, and this combination was no exception. Even at a mere 2,500 rpm, the Olds cranked out nearly 490 lb-ft, then went on to grunt out a solid 511 lb-ft at 3,700 rpm, and still managed to make a solid 445 hp at 5,000 rpm….

Average 474.5 358.7

What’s the difference between a Pontiac 400 and a Pontiac 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 is the difference between a Pontiac 400 and 455?

Did Pontiac make a 428 cubic inch 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 a 455 A big block?

Pontiac, Oldsmobile, and Buick each offered 455 cubic inch big block V8 engines in its muscle cars and full size models, but these engines didn’t share any attributes other than their displacement. Each of these 455 big blocks has become a legend in its own right.

Is Pontiac 455 a big block?

That’s right, the 455 was not a big block because Pontiac never had a big block. Or a small block. Throughout its entire existence, Pontiac only ever manufactured a single V8 engine family!

When did Pontiac stop making the 455 engine?

by Rob Wagner General Motors produced the Pontiac 455-cubic-inch V-8 engine from 1970 through 1976. The 455 wielded massive horsepower, but a new horsepower rating system and tighter emission controls drove the 455’s power lower each year until GM abandoned the engine in 1976.

Where is the engine code on a Pontiac 400 428 455?

Pontiac 400 428 455 Engine Codes. This is a quick block ID for junk yard hunting, etc. You must find the date code at the back LH side of the block first. The letter is the month, next 2 digits are the day and the last digit is the year.

What was the horsepower of a 1973 Pontiac 455?

In 1973, a 250-horsepower 455 with 370 foot-pounds of torque surfaced along with a 455 Super Duty, which provided 310 horsepower and 390 foot-pounds of torque.

Where is the casting code on a Pontiac?

Pontiac Block Casting Number 1955 to 1963 Casting code is located on the passenger side of the block. 1964 to 1967 Located on the back of the engine near the Distributor. 1968 to 1981 Located on the ledge at the rear of the block behind cylinder eight