Engine Specifications

427 Chevy Big Block - Radical Rat

Shaver Specialty Service
434-inch big-block Chevrolet
Bore:	4.285-inch
Stroke:	3.750-inch
CID:	434 cubic inches
Compression ratio:	10.5:1
Camshaft:	Crane solid roller
Cam duration:	256/260 degrees @ 0.050-inch tappet rise
Valve lift:	.820/.780-inch
Rocker ratio:	1.8:1
Lobe separation:	110 degrees
Installed centerline:	106 degrees
Top ring:	.043-inch Total Seal
Top ring gap:	.016-inch
Second ring:	1/16-inch Total Seal
Second ring gap:	.012-inch
Oil ring:	3/16-inch (9-lb drag)
Piston:	Mahle
Quench clearance:	.042-inch
Block:	World
Crankshaft:	Bryant, billet
Rods:	Eagle 6.800-inch
Main journal:	standard BBC
Rod journal:	2.100-inch
Cylinder head:	300cc Brodix oval raised port; Weldtech CNC; HVH
Peak intake flow:	375 cfm at .700 inch lift
Intake valve diameter:	2.300-inch
Exhaust valve diameter:	1.86-inch
Intake manifold:	Brodix, Ported by HVH
Carburetor:	Carb Shop Holley 4150
Carb spacer:	HVH
Header:	Hooker 2-inch primary
Ignition:	MSD

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427 Chevy Big Block - Radical Rat