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Nissan 240SX - Basics



KA24E Specifications
Displacement: 2.4 L
Type: SOHC Inline 4-cylinder
3 valves per cylinder
Materials: Cast Iron Block
Cast Aluminum Heads
Cast Aluminum Intake Manifold
Bore x Stroke: 89.0 mm x 96.0 mm
Compression Ratio: 8.6:1 (9.1:1 for early 1989 240SX)
Power: 140 hp @ 5600 RPM
Torque: 152 lb. ft. @ 4400 RPM
Redline: 6500 RPM
KA24E Valvetrain
KA24E Valvetrain

240SX models made before February of 1989 utilized the KA24E with a 9.1:1 compression ratio, outputting approximately 150 hp. After February of 1989, however, the compression ratio was reduced to 8.6:1 causing the KA24E to produce the advertised 140 hp.

The KA24E uses Sequential Electronic Fuel Injection (SEFI). The ECM controls each injector individually, releasing fuel into each cylinder on its intake stroke.

The KA24E is a reliable engine that can withstand substantial power increases on stock internals. This is due to the use of forged connecting rods and an internally balanced one-piece cast crankshaft.