Eagle 104283980 Ford FE 390 and 427 cast steel crankshaft.
Recommended in applications up to 700 horsepower.
Features 3.980" stroke with 2300 bobweight to create your stroker engine.
Rod journals are 2.438.
Main journals are 2.749.
Minimum rod length is 6.490.
Internally balanced in the front and externally balanced in the rear with stock rod journals.
Approximate weight is 69 pounds.
Standard oiling design.
Two piece rear seal design.
Has 6 flywheel bolt holes.
TECH NOTE: Recommend MS445P main bearings and CB760P rod bearings.
TECH NOTE: Stock 390 bore is 4.052. Stock 427 bore size is 4.232. Stock 390/427 stroke is 3.78. Stock 390/427 rod length is 6.488.
Eagle cast steel crankshafts offer an excellent alternative to reworking a factory cast crankshaft.
They are manufactured with a 0.092" radius on all journals, rear seal and snout for added strength while still using OE style bearings.
Each crankshaft is inspected for dimension, size and stroke accuracy.
Target bobweight is +/- 2%.
Lightening holes in each rod throw for reduced weight.
Based on a Ford 3Y design.
The Eagle 104283980 Ford FE 390 427 cast steel crankshaft makes building a reliable engine easier.
Eagle CRS6490F3D Ford 390 427 connecting rods.
These are matching connecting rods for the Eagle 104283980 crankshaft shown above.
Features 6.490" length.
Weighs in at 805 grams.
2.200" stock rod journals and 2.749 main journals.
Eagle ESP H-Beam connecting rods are forged from 4340 steel.
7/16" ARP 8740 bolts with precision alignment sleeves that locate the rod cap to help maintain big end bore size and eliminate cap walk.
Packaged in a weight-matched set (+or- 1 gram).
Sizing is done on the state of the art Sunnen Krossgrinding system.
All Eagle ESP Connecting Rods are multi-stage heat treated, magna-fluxed, and sonic tested.
The Eagle ESP series connecting rods are manufactured from a two-piece forging.
The forging process forces the grain into the shape of a connecting rod, resulting in a superior fatigue life.
The rod cap is forged separately so that the grain runs perpendicular to the load forces, which strengthens the rod.
Also, a higher content of nickel and chrome is used, which increases the strength and fatigue life without making the rod brittle.
Extensive testing has proven the Eagle two-piece forging to be superior to any one-piece forging on the market!
Eagle ESP connecting rods are the perfect choice for engines up to 850 horsepower.
Sold as a set of 8 Eagle ESP H-Beam connecting rods.
We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page.
We will not ship to freight forwarding - expediting companies.
PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.