How much horsepower can a Pontiac 455 make?
How much horsepower can a Pontiac 455 make?
A 455 High Output produces 335 horsepower and 480 foot-pounds of torque in each year from 1970 to 1971. A steadily decreasing force decreased the output beginning in 1972, which was at 300 horsepower with 415 foot-pounds as a result.
How much horsepower can you get out of a 455 big block?
Offering between 310 and 400hp, and pushing out a spectacular 500 lb-ft of torque, the 455 big block was most famously used in the 442 muscle car.
Is a 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.
How much horsepower does a 1973 Pontiac 455 have?
Horsepower and Torque 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.
How much can you bore a Pontiac 455?
So,for a 455 block (3.25″ mains): 4.250″ bore x 4.250″ stroke = 482 cid. 4.250″ bore x 4.500″ stroke = 511 cid.
What is the difference between a Pontiac 400 and 455?
In fact, the 400 actually has a slight advantage over the 455 for maximum performance applications because its smaller-diameter bearings offer less friction and its smaller main journal bore leaves more material in the bulkhead.
Is the Pontiac 455 considered a big block?
The Pontiac Version of the 455 Even the small displacement 326 CID motor is considered a big block.
What cubic inch is a 455 bored 60 over?
Pontiac Blocks- Bore and Stroke
| PONTIAC ENGINE CHART | ||
|---|---|---|
| ENGINE | BORE | |
| 455 CU. IN. | Stock Bore | 4.151 |
| 30 over | 4.181 | |
| 60 over | 4.211 |
Are the Pontiac 400 and 455 the same block?
We took the question to David Butler of Butler Performance in Lawrenceburg, Tennessee, for his professional opinion. 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.
What is a 455 HO motor?
The 455 HO designation made its debut in 1970; Rated at 360 or 370 hp (268 or 276 kW) (depending on which vehicle it was installed into) & 500 lb⋅ft (678 N⋅m) of torque, it differed from the regular full sized car 455 by large valve heads with smaller combustion chambers, and a larger camshaft.