How Much Horsepower Does A Oldsmobile 403 Have?

How much HP does a 455 olds have?

Factory horsepower ratings ranged from

310 all the way up to 400 ponies

, with 500 lb-ft the most common torque figure. The Cutlass would benefit from the hottest versions of the 455, starting right out of the gate with 1968’s Hurst/Olds, a 390hp special model with a more aggressive camshaft and carb setup.

Is a Olds 455 a big block?

The 455 big block Olds V8 was replaced in 1977 with the 403 cu in

(6.6 L) small

block, which used a 4.351 in (110.5 mm) bore, the largest ever used in a small-block V8, with the Olds small-block standard deck and 3.385 in (86.0 mm) stroke.

How do I identify a 403 Oldsmobile engine?

The 403 V8 is easily identified by

the oil fill spout growing out of the front of the engine

. Easy way to ID a 403: The Block casting number is found behind the timing cover between the oil fill tube and the oil sending unit. All 403’s have 1/2′′ Head bolt holes.

How much horsepower does a 1972 Oldsmobile 455 have?

Its 455-cu.in. engine, which was introduced in 1968 and featured in the Hurst Olds, Toronado and full-size models, became the standard 4-4-2 powerplant, rated at

365 hp

.

What is the most powerful small block engine?

The most powerful small block ever produced is

the LS9 engine used in the current Corvette ZR1

. It is rated at 638 horsepower, making it the most powerful engine ever produced by GM for a regular-production car. The lowest-output small block was the 1975-76 262 V-8 rated at 110 horsepower.

Did Oldsmobile make a 455 engine?

Oldsmobile’s 455

was produced from 1968 to 1976 as

the Rocket 455. It featured a 4.126-inch bore and 4.25-inch stroke. Oldsmobile had cheated the 400-cubic-inch GM ban in 1968-1969 by offering it as an underpublicized Hurst/Olds option on the 4-4-2 models.

What is the difference between a Pontiac 400 and 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′′

.

Is the Olds 455 a good engine?

Very good motor

. Huge torque and power wth very little tweaking. A mild cam a decent carb and a set of headers will give more street power than most can use. It will run forever too.

Is Pontiac 455 and 400 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.

Is the Oldsmobile 403 a good engine?

Overall, the Olds

403 is a good motor

. It’s reliable when maintained, and has a surprising amount of torque for a stock smog small block.

How do I identify my Oldsmobile engine block?

Facing the front of the engine, at the top surface of the timing chain area, to the left of the oil fill tube, there is a code

about 1.5′′ high followed by the casting number

. A letter indicates a big block, a number indicates a small block.

How much does a 403 engine weigh?

How do I identify an old 455 engine?

Casting Numbers

The numbers cast on the lower left corner of the engine block — or on the cylinder head — indicate the year the engine was manufactured. The casting numbers for a 455 include

395021F, 396021Fa and 231788L

.

What does the W 30 on a 442 mean?

This Oldsmobile 442 is equipped with the W-30 option package, which added the “Select-

Fit

” engine components, a W25 fiberglass hood which provides outside air induction through functional air scoops, a low-restriction air cleaner, a Winters aluminum intake manifold as well as a longer-duration, higher-lift cam.

How much horsepower does a 454 big block have?

The 454 EFI version was rated from

230 hp (172 kW) to 255 hp (190 kW)

and from 385 lb⋅ft (522 N⋅m) to 405 lb⋅ft (549 N⋅m) of torque.