How much horsepower does a 428 Pontiac motor have?
How much horsepower does a 428 Pontiac motor have?
The 428 was rated with 260 horsepower at 4,600 rpm, and that could be boosted to 270 with some factory modifications. The engine had 472 foot-pounds of torque, or pulling power, at 3,200 rpm.
Is the Pontiac 428 a big block?
That was pretty much it for the block work on this one; the block really just didn’t need anything more.” The bore and stroke combination comes to 428 ci, a displacement identical to some of the most powerful factory Pontiac engines….By The Numbers: 428ci Pontiac.
| Bore: | 4.350 inches |
|---|---|
| Oil | AMSOIL 5w20 |
When did Pontiac make the 428 engine?
1967
428 HO. This engine was first offered in 1967 as the top engine option in full-size Pontiacs. It was rated at 376 bhp in 1967 and 390 bhp in 1968 and 1969. For 1967 only Pontiac called this engine the Quadra-Power 428.
What is a Pontiac 6.6 engine?
Pontiac Firebird II Trans Am 400cu 6.6L Specs With a curb weight of 3666 lbs (1663 kgs), the Firebird II Trans Am 400cu 6.6L has a naturally-aspirated V 8 cylinder engine, Petrol motor. This engine produces a maximum power of 350 PS (345 bhp – 257 kW) at 5000 rpm and a maximum torque of 583.0 Nm (429 lb.
What is a 428 Pontiac engine?
The 428 was Pontiacs top engine for 3 short years- 1967-9. The bore is the same as the 400 at 4.12″. The stroke is 4″, the main journals are 3.25″. The 428 has remained one of the favorite Pontiac engines for racers and hot rodders and, are always one of the most sought after for a build up.
What kind of horsepower does a 428 Pontiac have?
The 428’s extra displacement brought extra power, with 360- and 376-hp variants in 1967 supplanted by 375- and 390-hp variants for 1968 and ’69. A contemporary Pontiac 400 V-8 Ram Air III in the GTO was rated at 366 hp in 1969, and the elusive Ram Air IV was rated at 370 hp.
What year did Pontiac replace the 428 with 455?
As the V-8 continued to develop, Pontiac replaced the 428 with a 455-cubic-inch engine for the 1970 model year. In 1967 the engine was used to power the 121-inch wheelbase Bonneville.
How much horsepower does a 428 Mustang have?
The 428 was rated with 260 horsepower at 4,600 rpm, and that could be boosted to 270 with some factory modifications. The engine had 472 foot-pounds of torque, or pulling power, at 3,200 rpm. By the 1969 model year, power had reached 290 horsepower.
What are the specs of a 428 Grand Prix?
Pontiac Grand Prix 428 HO specs Car type Coupe Curb weight 1820 kg (4012 lbs) Dimensions 5.28 m (208 in) long, 1.95 m (77 in) wid Wheelbase 2.97 m (117 in) Introduced 1967
