How much horsepower does a Pontiac 400 have?

360 horsepower
They found that the engine provided massive amounts of low-end torque and rock steady high RPM power output. The 389 posted numbers in the 330 horsepower range with a single spread-bore, four-barrel carburetor. The 400 pushed this number up to 360 horsepower, with the same Quadrajet single four-barrel.

How much power can a Pontiac 400 make?

Back in the day, the most powerful 400 (Ram Air IV) made by Pontiac put out 370 hp (GTO), so 512 hp is certainly a ton more performance; all in, it’s a package that looks deceptively stock.

Is a Pontiac 400 a good motor?

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.

Is Pontiac 400 a big block?

Chevrolet 400 (6.6 litre) Turbo-Fire small block V8: larger displacement than many big blocks. The only time the distinction needs to be made is in the case of Chevrolet’s “400” V8. That’s right, the 455 was not a big block because Pontiac never had a big block. Or a small block.

Are all Pontiac 400 the same?

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.

How much horsepower can you get out of a Pontiac 455 engine?

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 most powerful Pontiac engine?

At over 3,300 horsepower, it is regarded as the most powerful Pontiac engine known to exist. Youmans debuted the GTO at Middle Georgia Motorsports Park in late summer and then, at the urging of many in the Pontiac brotherhood, attended the Pontiac Nationals.

Did Pontiac make a 326 engine?

The 326 subsequently became the optional V8 engine for Tempests, and later the Pontiac Firebird, through 1967 and maintained the 17 degree cylinder head valve angle for its entire production run. A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output).

How much horsepower does a Pontiac 326 engine have?

280 horsepower
The high-output engine produced 280 horsepower at 4800 RPMs. It also supplied 355 ft-lb of torque at 3200 RPMs.