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131 1302 03 Plain Red Wrapper Chevy 502 Big Block Engine

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A “plain Jane” 502 big-block with nothing fancy bolted on. The engine is fed by a 770-cfm Holley through a GM dual-plane aluminum intake, and well-used premium fuel is expelled thru Patriot 17⁄8-inch tube headers and out 3-inch pipes through a pair of 40-series Flowmasters. The stock-sized valves in the rectangular port heads are popped by 1.7:1 roller rockers via a GM 544-inch lift, 234 degree duration hydraulic roller cam. The 118cc combustion chambers and GM forged pistons make a 9.6:1 compression ratio. On paper, the engine is rated for 500 hp and 550 lb-ft of torque. Fuel economy? You don’t want to know.

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