jhmek4 dohc vtec

Honda S2000
F20C
Displacement: 1,997 cc (121.9 cu in)
Compression: 11.7:1 (Japan), 11.0:1 (North America, Europe)
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) @ 9,200rpm & 22.2kgm (217.71 Nm) @ 7,500 rpm
USDM 240 HP @ 8,300 rpm; 153 ft lb, 207 Nm @ 7,500 rpm
Redline: 8900 rpm
VTEC: "around 6000 rpm" [3]
The F20C was designed with high maximum rpm capability in mind, for increased power output; redline is at 8900 rpm, with VTEC engagement at 6000 rpm. Its relatively long stroke of 84mm results in a mean piston speed of 4965 ft/m, or 25 m/s, second highest than any other production car to date.[4] It is only beaten by the B7 Audi RS4 (2006-2008). 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 homologation version of 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 mass production naturally aspirated piston engine until Ferrari released the 458 Italia and Porsche the GT3 RS 4.0 in 2010/2011, which produce 124.5 HP/L / 125 HP/L, respectively.

F22C1

F22C1
Displacement: 2,157 cc (131.6 cu in)
Compression: 11.1:1 (North America, Europe)
Bore: 87 mm (3.4 in)
Stroke: 90.7 mm (3.57 in)
Power:
USDM 240 HP @ 7,800 rpm; 162 ft lb @ 6,500 rpm[5] (revised to 237 hp (177 kW) @7800 rpm in 2005 per SAE Certified Power standard)[6]
Redline: 8200 rpm
VTEC: "around 6000 rpm" [7]
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 lb·ft (207 N·m) at 7500 rpm for the F20C to 162 lb·ft (220 N·m) at 6500 rpm for the F22C. The redline was reduced from 8900 rpm to 8200 rpm, mandated by the longer travel distance of the pistons. Peak horsepower output was originally rated identical to the F20C, with "overall powerband characteristics strengthened 4% to 10% between 1000 -8000 rpm".[8]

The F22C1 was used exclusively in the North American market for 2004 and 2005 with the F20C being used in all other markets. 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:

2004–2009 Honda S2000 (F22C1)(North America)
2006–2009 Honda S2000 (Japan)