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ZL1 A Chevy Big-Block Legend - ZL1 At A Time

Crate Ram Jet Zl1 Stud Adjuster Crate Ram Jet Zl1 Injectors Crate Ram Jet Zl1 Manifold Shelf
Crate Ram Jet Zl1 Upper Intake Crate Ram Jet Zl1 Fuel Pump Crate Ram Jet Zl1 Partially Complete Engine
RAM JET ZL1 TECH SPECS
Block 356-T6M aluminum alloy
Bore 4.250 in.
Stroke 4.000 in.
Displacement 454 ci (7.5L)
Main caps 4-bolt splayed (steel)
Crankshaft 1053 forged steel, nitride treated
Connecting rods 4340 forged steel, shotpeened
Pistons forged aluminum, pressed pin
Compression ratio 10.0:1
Camshaft Mechanical roller tappet
Cam lift .640 inches (intake),
.598 inches (exhaust)
Cam duration 236 degrees (intake),
232 degrees (exhaust)
Lifters Mechanical roller tappet
Timing chain Single roller
Balancer 8 inches
Cylinder heads Aluminum oval port, 110cc chamber
Valves stainless; 2.25 inches
(intake), 1.88 inches
(exhaust)
Rocker arms 1.7 ratio, aluminum roller
Distributor HEI with melonized cam drive gear
Ignition timing Base 10 degrees
Fuel 93 octane
Horsepower 510 at 5,750 rpm
Torque (ft-lb) 493 at 4,250 rpm

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