Crate Engine, GM, ZZ427 GM # 19331572

A MODERN TAKE ON THE CLASSIC L88

The L88 427 was the ultimate expression of Chevy’s production Big-Block power, combining a rigid iron cylinder block with lightweight aluminum cylinder heads and a single, four-barrel carburetor. Our engineers have recreated that classic, raspy rat engine, but with updated components that enhance drivability – and performance! The engine assembly features the latest-generation block casting with four-bolt main caps, an all-forged rotating assembly for exceptional strength and durability, and a hydraulic roller camshaft instead of the original L88’s flattappet cam, for greater drivability and a broader performance range. It also features aluminum oval-port cylinder heads with 2.19/1.88-inch valves and a pump-gas-friendly 10.0:1 compression ratio.

TECH SPECS: Max Recommended rpm: 6,400 Compression Ratio: 10.1:1 Block: 4-bolt main, cast-iron Crankshaft: 19171620, forged steel Connecting Rods: 19211226, Forged steel Pistons: 19171618, forged aluminum Camshaft Type: 12366543, hydraulic roller Valve Lift (in): .527 intake / .544 exhaust Camshaft Duration (@.050 in): 224° intake / 234° exhaust Cylinder Heads: 19331423, aluminum oval port, 110cc chambers Valve Size (in): 2.190 intake / 1.880 exhaust Rocker Arms: 19210726, aluminum roller style Rocker Arm Ratio: 1.7:1 Distributor: 88961867, HEI Carburetor: 19170093, 770-cfm Flexplate: 12561217), 14" Fuel: 92 Octane Ignition Timing: 10-12° BTDC @ 1,000 rpm Balanced: Internal Intake Manifold: 12363406, dual plane