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The F20C and F22C1 are inline-4 engines produced by Honda. They are the only Honda 4-cylinder engines that are designed to sit longitudinally for rear wheel drive.

These engines are unrelated to the F-series engines found in the mid 90s Honda Accord and Prelude. They share many properties with the K-series. These engines, unlike most F-series engines, have two counter-rotating overhead cams, a VTEC system for both the intake and exhaust camshaft, carbon-fiber reinforced cylinder liners (FRM), molybdenum disulfide-coated piston skirts for reduced friction, and uses a more modern chain driven valvetrain as opposed to a belt driven system.

[edit] F20C

The F20C was designed with high maximum rpm in mind, for increased power output; redline is at 9000 rpm, with VTEC engagement at 6000 rpm. Power output is 240 bhp (179 kW) at 8300 rpm in North America and Europe. The Japanese version, which has a higher compression ratio, is capable of 250 PS (247 bhp) at 8600 rpm. Honda's F20C Engine won a spot on Wards' 10 Best Engines List four times, in 2000, 2001, 2002 and 2003.

The engine displaces 1,997 cc (121.9 cu in), lending to the Honda S2000's name. This method of naming follows suit with the rest of the Honda S roadsters (ie. Honda S500, S600, and S800).

The F20C's bore is 87 mm (3.4 in) and stroke is 84 mm (3.3 in).

Applications:

• 1999-2003 Honda S2000 (North America)
• 1999-2005 Honda S2000 (Japan)
• 1999-present Honda S2000 (United Kingdom, Europe, Australia)

The F20C produces the highest specific power for any naturally aspirated piston engine in a car worth less than US$100,000, at 120 bhp (89 kW) per liter, ahead of the 1.6 L (98 cu in) Honda B16B engine found in the 1996-2000 Honda Civic Type R producing 185 bhp (138 kW) for a specific power of 115.8 bhp (86.4 kW) per liter.

[edit] F22C1

F22C

In 2004, Honda produced a stroked 90.7 mm (3.57 in) version of the F20C, increasing displacement by 160 cc (9.8 cu in) to 2,157 cc (131.6 cu in). Dubbed the F22C1, it was originally designed for the North American market being introduced for the 2004 model year. Rated torque increased from 153 ft·lbf (207 N·m) at 7500 rpm for the F20C to 162 ft·lbf (220 N·m) at 6200 rpm for the F22C. The redline was reduced from 9000 rpm to 8000 rpm, mandated by the longer travel distance of the pistons. Peak horsepower output is rated identical to the F20C.

The F22C1 was used exclusively in the North American market for 2004 and 2005 with the F20C being used in all other markets. Despite the displacement increase, the car to which the F22C1 is mated retains the name of Honda S2000. In 2006, the engine fully replaced F20 engines in the Japanese market as well which resulted in a drop in rated power output from 250 PS (247 bhp) to 242 PS (239 bhp) due to compression being reduced from 11.7:1 to 11.0:1. The UK, European, and Australian markets are currently the only areas in which the S2000 retains the F20C.

Applications:

• 2004-present Honda S2000 (North America)
• 2006-present Honda S2000 (Japan)

[edit] See also

• List of Honda engines

[edit] External links

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