What is the difference between a Ford 390 and a 428?

As referenced earlier, the 390 was a 4.050 bore and a 3.781 crank. The 428 was a 4.130 bore and a 3.984 crank. Ford 428s had a different water jacket core which can often be identified by the “428” cast in the bottom of the inner water jacket right under the center freeze plug.

How much horsepower does a 428 Pontiac motor have?

The first 428 was rated at 375 horsepower, while the second was the 390-horse 428 HO. As the most powerful motor in the Pontiac stable (at least on paper), the HO consisted of a high-performance camshaft, special exhaust manifolds, and chrome air cleaner, rocker covers, and oil cap, among other things.

What is the difference between a 427 and 428?

the 427 is a large bore short stroke motor (4.23″ bore x 3.78″ stroke) made to produce horsepower at high rpms. By 1965 Ford had a 427 motor that could run 7500 rpms for 24 hours. The 428 (4.13″ bore x 3.98″ stroke) is a low rpm torque motor for the street. Both can make the same horsepower.

How can you tell if a cobra is a 428?

If you have access to the rear of the block, the most definitive method for verifying that you are looking at a reinforced 428 block (as used in most 428 PI, 428 CJ, and 428 SCJ applications) is to check the rear face of the block for a scratch mark manually installed at the foundry which roughly reads “C”; see the …

What cubic-inch is a 428 bored 30 over?

Pontiac Blocks- Bore and Stroke

PONTIAC ENGINE CHART
ENGINE		BORE
428 CU. IN.	Stock Bore	4.120
	30 over	4.150
	60 over	4.180

What is the horsepower on a Pontiac 428?

While the 428 was a rather short-lived power plant in terms of production, it was no slouch. Rated at 360 horsepower or more depending on the induction configuration, it was a torque making slugger designed to get the barge sized big cars down the roads and highways happily. It is kind of a forgotten hero.

How much horsepower does a Pontiac 428 have?

What can a 454 be stroked to?

Best of all, they’re ripe for the stroker treatment. Take a 454, add a 4.250-inch stroke crank along with some 6.385-inch rods and your displacement shoots up to 489 cubes. Now bore those cylinders out a touch, to say . 060-inch over and you end up with the venerable 496.