If you're diving into the world of performance engines, you might want to take a closer look at the Eagle Forged 4340 Crankshaft. This isn’t just any crankshaft; it’s built tough and designed to handle some serious power—up to 1500 horsepower, to be exact. Whether you’re building a street beast or a track monster, this crank’s got your back.

What sets the Eagle crank apart is the craftsmanship. Each one is forged from high-quality SAE 4340 steel, which means it’s not just strong but also reliable. The non-twist forging process they use ensures that the integrity of the metal is top-notch. Plus, it goes through a multi-stage heat treatment that includes stress relieving, shot peening, and nitriding. This isn’t just for show; these processes enhance strength and durability, making it suitable for the most demanding applications.

Every journal on the crank is micropolished to a 3 R.A. or better. That’s not just a fancy number—this level of polish means less friction and better performance. And with a .125” radius on all journals, you’ll need to use chamfered bearings, but this design choice boosts strength where it counts. It’s all about keeping things running smoothly, especially when you’re pushing your engine to its limits.

Now, if you’re looking for something a bit lighter, check out the lightweight versions of these cranks. They’ve got knife-edged counterweights that shave off about 5-6 lbs. That’s a noticeable difference when you’re trying to reduce windage and improve your engine’s response.

For those who might be considering a cast option, Eagle also offers a cast steel crankshaft. It’s a solid alternative to factory options, with all radii set at .092”, which means you can stick with OE style bearings. This one’s good for setups up to 500 hp, and it’s designed for a balanced setup, so you won’t have to worry about any surprises when you hit the gas.

Features:

• Material: Forged 4340 steel
• Intended balance: Internal
• Target bobweight: 1600g
• Stroke: 3.750"
• Rod journal: 1.889"
• Rod journal width: 1.900"
• Main journals: 2.657"
• Minimum rod length: 5.950"
• Typical weight: 47 lbs.
• Flywheel bolts: 8

Fitment:

• Ford Crown Victoria 1992-2009
• Ford E-150 1997-2008
• Ford Expedition 1997-2004
• Ford Explorer 2002-2009
• Ford F-150 1997-2000
• Ford Mustang Bullitt 2008-2009
• Ford Thunderbird 1994-1997

Note:

• Crankshaft must be balanced to match your specific rods and pistons.

So, if you’re ready to take your build to the next level, you can’t go wrong with the Eagle Forged 4340 Crankshaft. It’s built for performance, and it’s ready to handle whatever you throw at it.