Honda F20C engine

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The Honda F20C and F22C engine is unrelated to the F-series found in the Honda Accord. It shares many properties with the K-series. This engine, unlike most F-series engines, has two counter-rotating overhead cams, a VTEC system for both the intake and exhaust camshaft, carbon-fiber reinforced cylinder liners, moly-coated piston skirts for reduced friction, and uses a cam chain insted of a rubber belt. It is the only Honda engine that is designed to sit longitudinally for rear wheel drive, with exceptions to the Acura Vigor G25A1(92-94) & the Acura TL G25A4(96-98). Even though these are branded Acura, Honda manufactured them in Japan for the North American market. These engines were longitudinally mounted even though they were front wheel drive vehicles. The transmissions were effectively folded in half, so to speak, and the differential was mounted on the left/drivers side of the car.

The F20C was designed with high maximum RPM in mind, for increased power output; redline is at 8900 rpm, with VTEC engagement at 6000 rpm. Power output is 240 hp ECE (176 kW) at 8300 rpm in Europe or 240 hp SAE (179 kW) at 8300 rpm in North America. The Japanese version, which has a higher compression ratio, is capable of 250 hp JIS (184 kW) at 8300 rpm. Honda's F20C Engine won a spot on Ward's 10 Best Engines List two times, in 2000 and 2001.

The engine displaces 1997 cubic centimeters, lending to the Honda S2000's name (1997 rounded to 2000). This method of naming follows suit with the rest of the Honda S-series.

The F20C's bore is 87 mm and stroke is 84 mm.

Applications:

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

[edit] F22C1

In 2003, Honda produced a stroked (to 90.7 mm) version of the F20C, increasing displacement by 160 cc to (nominally) 2.2 L. Dubbed F22C1, it was originally designed for the North American market, and introduced for the 2004 model year. Rated torque increased from 153 lb·ft at 7500 rpm for the F20C to 162 lb·ft at 6200 rpm for the F22C. However, redline was reduced to 8000 rpm and power output is rated identical to the F20C. Despite the displacement increase, the car to which the F22C1 is mated retains the name of S2000. In 2006, the engine fully replaced F20 engines in the Japanese market as well, taming rumors that Honda was interested in a dual-engine option, or that the torque/redline tradeoff was only intended for the North American market. The UK/European market is currently the only one in which the S2000 retains the 2.0 L F20C.

Applications: