How much horsepower does a 428 Pontiac 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.
Is Pontiac 428 a good 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 Pontiacs came with a 428?
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 |
|---|---|
| Displacement | 428 ci |
| Compression ratio: | 11.48:1 |
| Camshaft: | custom Lunati hydraulic roller |
| Valve lift: | .840/.772 inch |
Did Pontiac make a 428 motor?
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.
Did GM make a 428?
Intended for full-size cars, Pontiac’s 428 has plenty of muscle car history, even if it took some aftermarket wrenching to make it so. GM had an internal policy that limited mid-size cars to engines no larger than 330 cubic inches.
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.
What kind of transmission does a Ford 428 have?
A three-speed automatic transmission was standard and a three-speed manual was an option. The engine used six quarts of oil and 17 quarts of coolant. The larger cars had 26 gallon gas tanks in 1967. The 428 was rated with 260 horsepower at 4,600 rpm, and that could be boosted to 270 with some factory modifications.
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.
