427 FE Aluminum Block BB
redesigned, the Shelby 427 Alloy FE block is 45 percent lighter,
yet stronger than the factory cast iron version. It retains original
factory engine mounting bosses and bell housing bolt pattern,
making it a bolt-in replacement for 390/427/428 cast iron Fe blocks.
The Shelby FE block is fully CNC machined and comes ready for
block offers these premium performance features:
lifter valley reinforcing webs combined with thick oil pan rails
and main webs maximize block strength.
Thick 0.750-inch deck delivers the foundation needed for maximum
head gasket sealing and retention.
Priority main oiling system. With the oil gallery raised adjacent
to the camshaft bore, oil flow is directed to main bearings
first, before going to the cam bearing. Crank life is maximized.
Strong enough to support over 1500 horsepower outputs.
Shelby's FE alloy block delivers superior bottom end stability
at high rpm.
2,3,4 main caps are cross bolted with 4 cross bolts. Main caps
are billet steel and cap alignment is further enhanced by integral
dowel section in the main studs.
Steel caps allow moderate bearing cleances for cold starts.
cast duplicate iron. cylinder sleeves are fitted in the block,
with an interference step fit that creates precise, non shift
sleeves positioning. Cylinder walls are stained and revised cooling
passages make street or race track cooling problems a thing of
requires special Shelby head studs, available separately. Unlike
a stock block, where the head bolt threads start at the deck surface,
the Shelby stud threads are positioned adjacent to the cylinder
bore bottom. This configuration delivers maximum gasket seal/retention
and minimum cylinder bore distortion when the head is torqued
to the block.
427 FE Aluminum Block Technical Features
Block Material: A356,T6 aluminum Blocks is CNC machined
Deck Height: 10.150-inch
Deck Thickness: 0.750-inch
Cylinder bore range: 4.375 - 4.400 inch
Maximum Stroke: 4.500-inch
Displacements up to an easy 525 cubic inches
Centrifugally cast ductile iron
Cylinder wall: Siamese with dry liners
Main bearing cap: Billet steel
Main bearing cap bolt configuration: studs;4cross bolts on 2-3-4
Accommodates wet or dry sump oiling systems
Head stud diameter: 0.500-inch
Bare block weight: 125 pounds, approximately
Horsepower range: 1,500 plus