|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...
Fortunately, the typo doesn't affect rod integrity. Valley Head is reconditioning each rod by machining the large end to a perfect circle again.
Garrett's 428 is remarkably...
Garrett's 428 is remarkably healthy, with a standard crank that needs nothing more than a journal polishing. Standard main and rod bearings will work fine for this application.
The 428 is externally balanced,...
The 428 is externally balanced, which makes it different than the 332, 352, 360, 390 and 427 engines, which are internally balanced. The 428 needs its flexplate (or flywheel) and harmonic balancer for proper dynamic balancing.
Forged Federal-Mogul TRW pistons...
Forged Federal-Mogul TRW pistons are ready for anything Garrett decides to throw at them. Sealed power piston rings keep hot gasses and oil where they belong.
A Crane dual-roller timing...
A Crane dual-roller timing set and roller hydraulic camshaft are installed in the 428. We're going for enough lift and the right amount of duration to give the 428 abundant low-end torque. This FE will give Garrett "grunt!" thanks to Crane's cam profiling. Remember this camshaft is compatible only with hydraulic lifter FE blocks. It will not work in a mechanical lifter block, which doesn't have the oil gallerys to support hydraulic lifters.
Crane roller lifters are linked...
Crane roller lifters are linked together like this. Roller tappets breathe new life into an FE because they reduce internal friction and drag. They also allow us to run a more aggressive profile.
Steve Dragus of Valley Head...
Steve Dragus of Valley Head Service in Northridge, California, dials in the FE's cam-timing events. Here, he checks cam timing with a degree wheel and TDC piston stop.
We're installing a Sealed...
We're installing a Sealed Power high-volume oil pump for improved oil flow. We have chambered the crankshaft-journal oiling holes, and opened up the oil gallery between the oil pump and main bearings. We're installing a Milodon deep-sump oil pan for added capacity. Remember, engine oil not only lubricates-it cools.
Steve is using Permatex's...
Steve is using Permatex's Right Stuff between the oil pan gasket and block for better sealing. He has already properly handled the rear main seals, which tend to leak with FE engines.