|Crane Roller Hydraulic Camshaft Specifications|
|Cam Specifications at .050-inch|
|Lift at Valve:||.517/.546-inch intake/exhaust, with 1.76 rocker arms|
|Lift at Cam lobe:||.294/.310-inch intake/exhaust|
|Advertised Duration:||268.0 degrees intake, 278.0 degrees exhaust|
|Facts:||The Crane Hydraulic Roller Special has an operating range of 2,000 to 5,500 rpm. Valve float happens at 6,500 rpm. This is a good street/strip camshaft with a broad torque curve. Torque comes on strong around 3,500 rpm and continues through 5,500 rpm.|
You might be inclined to think the 428 head is the best head we could top this engine with. But, you'd be wrong. Garrett has not chosen the 428 head or the 428 Cobra Jet head. He has chosen the '61 390 High Performance head casting for his 428 project. The 390 High Performance has the same 2.02/1.55-inch valves and, virtually, the same port sizes. However, the 390 Hi-Po head has smaller chambers for greater compression. We're going to have Valley Head Service work these heads and make them better with some mild port work, new guides and valves, and hardened valve seats for greater reliability.
If you are ever in doubt about head gasket installation after cylinder heads have been installed, remember this: properly installed head gaskets always stick out at the outer, front corners of the heads and block. If they're backwards, the gasket won't be visible here.
|428ci FE 6V Expected Performance Levels|
What We Would Do Differently
Quite frankly, our 428 FE buildup is capable of greater levels of power than we have shown you here. We have built a rather conservative 428-inch mill. What does our FE big-block need to push power levels beyond 393 hp and 466 lb-ft of torque?
First, we would remove the tri-power setup. It looks terrific and, properly tuned for a racing environment, will make brute power in an FE big-block. All our 428 needs is an Edelbrock Performer 390 intake manifold and 750-cfm Holley, Edelbrock or Demon carburetor to improve horsepower and torque figures considerably. If we want to push the numbers closer to 450-500 hp and, at least, 500 lb-ft of torque, we opt for Edelbrock Performer heads, which offer us greater port and valve size for better performance. We would also step up our camshaft specs to something a pinch more radical, with more valve overlap and greater duration from Crane. Finally, we fit the 428 with an MSD ignition system and a 6A box for maximum ignition performance. These are all simple bolt-on modifications that will make a difference.
Fortunately, the typo doesn't affect rod integrity. Valley Head is reconditioning each rod
Garrett's 428 is remarkably healthy, with a standard crank that needs nothing more than a
The 428 is externally balanced, which makes it different than the 332, 352, 360, 390 and 4
Forged Federal-Mogul TRW pistons are ready for anything Garrett decides to throw at them.
A Crane dual-roller timing set and roller hydraulic camshaft are installed in the 428. We
Crane roller lifters are linked together like this. Roller tappets breathe new life into a
Steve Dragus of Valley Head Service in Northridge, California, dials in the FE's cam-timin
We're installing a Sealed Power high-volume oil pump for improved oil flow. We have chambe
Steve is using Permatex's Right Stuff between the oil pan gasket and block for better seal