Honda F20C engine: Difference between revisions
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Revision as of 17:47, 5 October 2010
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 H-series. These engines, unlike most F-series engines, have two overhead cams, a VTEC system for both the intake and exhaust camshaft, Fiber-Reinforced Metal cylinder liners (FRM), molybdenum disulfide-coated piston skirts for reduced friction, and uses a timing chain.
F20C
- Displacement: 1,997 cc (121.9 cu in)
- Compression: 11.7:1
- Bore: 87 mm (3.4 in)
- Stroke: 84 mm (3.3 in)
- Rod Length: 153 mm
- Rod/stroke ratio: 1.82
- Power: JDM 250 PS (183.88 kW) @ 8,300rpm & 22.2kgm (217.71 Nm) @ 7,500 rpm
- USDM 237 HP @ 8,300 rpm; 153 ft lb , 207 Nm @ 7,500 rpm
- Redline: 9000 rpm
- VTEC: 6100 rpm
The F20C was designed with high maximum rpm capability in mind, for increased power output; redline is at 9000 rpm, with VTEC engagement at 6000 rpm. Its relatively long stroke of 84mm results in a mean piston speed of 4965 ft/m or 25m/s, higher than any other production car to date.[1] 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 (i.e. Honda S500, S600, and S800).
Applications:
- 1999-2005 Honda S2000 (Japan)
- 2000-2003 Honda S2000 (F20C1) (North America)
- 1999–2009 Honda S2000 (United Kingdom, Europe, Australia)
The F20C produces the highest specific power output for any naturally-aspirated 2.0L piston engine in a car priced under US$100,000, at 123.5 hp (92.1 kW) per liter, ahead of the SR16VE N1 found in the JDM Nissan Pulsar producing 197 bhp (147 kW) for a specific power of 123.45 bhp (92.06 kW) per liter. The F20C held the record for producing the highest specific power output for any production naturally aspirated engine until Ferrari released the 458 Italia in 2010, which produces 124.5 HP/L.
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. Maximum power output was maintained at 240 hp (180 kW) @7800 rpm. Rated torque increased from 153 ft⋅lbf (207 N⋅m) at 7500 rpm for the F20C to 162 ft⋅lbf (220 N⋅m) at 6500 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 F20C 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). Outside of Japan and the United States, the F20C continued to be the only available engine.
Applications:
- 2004–present Honda S2000 (F22C1)(North America)
- 2006–present Honda S2000 (Japan)
See also
References
External links
