A set of World Products forged...
A set of World Products forged aluminum pistons (with coated skirts) rounds out the rotating assembly and delivers an 11.1:1 compression ratio.
The camshaft is a hydraulic roller from Comp Cams, with big 0.669-inch/0.676-inch lift specs, along with 254/260-degrees duration and a 110-degree lobe separation angle.
Atop the block is a pair of World's own 18-degree aluminum cylinder heads, which boast large, 225cc intake runners that feed fast-burn-style 72cc combustion chambers (an upgrade to CNC-ported versions of the heads brings enormous 242cc intake runners, which is good for about another 50 horsepower). The tunnel-like intake paths are considerably larger than comparable Ford heads, which have 224cc runners. The valves are matched to the heads' tremendous flow, measuring 2.055 inches on the intake side and 1.600 inches on the exhaust. Make no mistake, these are huge-flowing heads, but very necessary for an engine with such a large displacement.
The next item in the block...
The next item in the block during the assembly is the camshaft. It is a hydraulic roller from Comp Cams, with specs that include 0.669/0.676-inch lift, 254/260-degrees duration, and a 110-degree lobe separation angle.
Not surprisingly, stiff, dual 125-pound per inch valvesprings (1.437-inch-diameter) complement the valvetrain, along with cus-tom aluminum roller-tip rocker arms with a 1.72:1 ratio. They're mounted on screw-in studs. Also, the Man O' War block can accept two additional head bolts per cylinder, which provide an extra measure of sealing for forced induction and nitrous applications-power adders were not in the plans for our project engine. To feed the 460's big passages, a 1,050-cfm AED-built Dominator carburetor is mounted to World Products' single-plane, high-rise intake manifold.
During our test, World's 460-inch Windsor-style engine's 632hp peak was achieved at 6,000 rpm. World says the engine's upper limit is about 6,500 rpm. Peak torque registered 618 lb-ft on our test, and was reached at 4,800 rpm. But there's definitely more to the numbers than the peak figures: The "little" 460 made more than 560 lb-ft at only 3,500 rpm and crossed the 600 lb-ft threshold by 4,400 rpm.
On the horsepower side, it hit 400 horses by 3,700 rpm and curved smoothly upward toward its peak, crossing 500 horsepower by 4,400 rpm and 600 horsepower by 5,200 rpm. Clearly, the deeper this big-volume engine breathes, the stronger it gets, but we were surprised by how well the engine idled and performed at low rpm.
With the crankshaft and camshaft...
With the crankshaft and camshaft installed, a double-row timing chain is installed and the camshaft is degreed. It's easier to make adjustments when only the crank and cam are in the block
With its big cam and high-rise single-plane intake, we frankly expected a bit of stumbling down low. We saw none. Of course, the dyno is a different environment than the street, but not enough to drastically alter the attributes we experienced during testing. There's a lope to the idle no doubt about it, but this engine shouldn't be a problem for cars with power brakes, and more.
For us, the prospect of popping the hood at cruise night and answering "460," when someone asks, "watcha' running?" and stares at an obvious small-block package will be worth it. Of course, there's something to be said for keeping mum about the displacement-especially for those forays to the track-and let the bystanders scratch their heads after viewing the Windsor package under the hood.
With this 460-inch combo, there's no reason to make compromises with the front-end weight penalty or tightly packed engine compartment that comes with a 385-family 460. And, frankly, for the World Products engine's approximate $15,000 price tag, you'd be hard-pressed to build a vintage 460 to make similar power for less, and it simply wouldn't have the lower-mass advantage. Indeed, for a pro-touring-style '68 Mustang fastback or a '71 street/strip car, this 460-cube package in a 351-inch wrapper has much to offer.
A Moroso deep, dual-sump oil...
A Moroso deep, dual-sump oil pan is standard and is designed for the typical Ford crossmember found in classic Mustangs and other vintage Fords. Beneath the pan is a Melling high-volume oil pump, pick-up, and more.
The Limited Edition 460 comes...
The Limited Edition 460 comes with aluminum versions of World Products' 18-degree cylinder heads. They're available in a variety of configurations, but for our mega-inch Windsor, they feature cavernous 225cc intake runners that flow about 300 cfm at 0.800-inch lift at 28 inches of water.
The Manley Severe Duty valves...
The Manley Severe Duty valves in the 18-degree heads are 2.080 inches in diameter on the intake side, and 1.600 inches across on the exhaust side. They're the big doors to 72cc fast-burn-style combustion chambers that promote a quick, more complete burn of the mixture.
Take a closer look at the...
Take a closer look at the installed cylinder heads and you'll see dual, 1.437-inch diameter springs with dampers. They are rated at 125 pounds per inch and can handle up to 0.700-inch lift. Locks and retainers are from Manley, while the springs and valve seals are World Products' own parts.
Custom 1.72:1-ratio aluminum...
Custom 1.72:1-ratio aluminum roller rocker arms from Scorpion are used in the 460. They mount to screw-in studs and complement custom 8.500-inch-long, 5/16-inch pushrods.
Another World Products-manufactured...
Another World Products-manufactured component of the assembly is the high-rise, single-plane intake manifold. It has a "spider"-type design, with individual intake runners that are excellent at increasing the mixture velocity as it is channeled into the heads.