The J30 displaces 2,997 cc (2.997 L; 182.9 cu in) and is a SOHCVTEC design. Output for
the light weight 250 lb (110 kg) J30A1
was 200 hp (150 kW) and 195 lb·ft (264 N·m) of torque. The J30A4 pushed output to 240 hp (180 kW) and 212 lb·ft (287 N·m) using a three-way VTEC system, higher (10:1) compression ratio, and a novel exhaust manifold cast as one piece with the cylinder head.
It weighs nearly 20 lb (9.1 kg) lighter and is an inch shorter than J30A1. This version was on the
Ward's 10 Best Engines list for 2003 and 2004. The IMAhybrid version was on the list for 2005. In 2006 to mark the 30th anniversary of the Accord, Honda created the J30A5, which boosted output to 244 hp (SAE Net 08/04) and 211 ft·lbf (SAE Net 08/04) of torque. According to Honda, horsepower gains were achieved with extensive improvements to the airflow of the intake and exhaust system.
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