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 was the last year Pontiac made the 455?
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.
How do I know if my Pontiac engine is a 455?
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. There is no displacement stamp for 421, 389 or 326 blocks. To further identify the year and application, move to the top and rear of the block, where the distributor is mounted.
Which Pontiac had a 455 engine?
1970 Pontiac GTO 455
In 1970, General Motors removed the limit altogether. The result was the 1970 Pontiac GTO 455, which was stuffed with a beefy 455 HO V8 long-stroke engine.
How many liters is a Pontiac 455?
Displacement began at 287-cubic-inch (4.7 L) and grew as large as 455-cubic-inch (7.5 L) by 1970. Pontiac continued to manufacture its own engines, distinct from Buick, Cadillac, Chevrolet, or Oldsmobile, until 1981.
How much horsepower did the Pontiac 455 have?
360 horsepower
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.
How much horsepower does a 455 engine have?
The standard 455 wielded 350 horsepower and the performance Stage 1 version developed 370, although testing on many Buick 455s put the horsepower rating closer to 425. However, what made the 455 special was its torque rating of 510 foot-pounds, more than any other engine on the road in 1970.
How much horsepower can a Pontiac 455 make?
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 is the horsepower of a 455 engine?
Engine Displacement: 455 ci. Horsepower: 550. Torque: 575 lb-ft. Bore/Stroke: 4.155/4.21. Block/Crank Combo: Pontiac 400 block, Eagle cast crankshaft.
What kind of engine is a 400 stroked to 455?
DCI Pontiac 400 Stroked to 455 Crate Engine DCI 400-455 is DCI’s most popular crate engine. Featuring a Pontiac 400 cubic inch block stroked to 455 cubic inches, this authentic Pontiac stroker is perfect for street and strip use. The 400-455 is pump gas friendly for the mild daily driver.
What size is a 455 Pontiac Stroker?
Featuring a Pontiac 400 cubic inch block stroked to 455 cubic inches, this authentic Pontiac stroker is perfect for street and strip use. The 400-455 is pump gas friendly for the mild daily driver.
What kind of engine does a Pontiac 462 have?
Our 462-inch hydraulic flat-tappet stroker engine offers significantly more power than any factory-installed Pontiac engine, yet is convenient enough for street-driven use — even in a daily-driver.
