In early 1991, a 2.2 liter representative of the F-series was launched under the name F22. This motor was based on the F20 and used its aluminum cylinder block, 219.5 mm high. The cylinder diameter remained unchanged, but the crankshaft was replaced with a longer stroke, with a piston stroke of 95 mm, and the connecting rods were replaced with shorter ones of 141.5 mm. The pistons are 85 mm in diameter and their compression height is 30.5 mm. This set allowed to increase the working volume to 2.2 liters.
Characteristics of the Honda F22B/F22C engine
| Parameter | Value |
|---|---|
| Manufacturing | Honda Motor Company |
| Engine make | F22 |
| Years of production | 1991-2009 |
| Cylinder block material | Aluminum |
| Power system | Injector |
| Type | Ready |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 95 / 90.7 (F22C) |
| Cylinder bore, mm | 85 / 87 (F22C) |
| Compression ratio | 8.8 / 9.3 / 9.8 / 11.1 |
| Engine displacement, cc | 2156 / 2157 (F22C) |
| Engine power, hp/rpm | 125/5200, 130/5200, 130/5300, 135/5200, 140/5600, 145/5500, 150/5900, 160/6000, 240/7800 |
| Torque, Nm/rpm | 186/4000, 193/4000, 188/4200, 193/4500, 199/4500, 198/5000, 201/5000, 220/7000 |
| Fuel | AI-95, AI-98 |
| Engine weight, kg | 145 (F22A) |
| Fuel consumption, l/100 km (for Honda Accord 2.2) | City – 11.7, Highway – 6.8, Mixed – 8.5 |
| Oil consumption, gr./1000 km | Up to 500 |
| Recommended oil | 5W-20, 5W-30, 5W-40, 10W-30, 10W-40, 10W-50, 15W-40, 15W-50, 20W-20, 0W-40 (S2000), 5W-30 (S2000), 5W-40 (S2000), 5W-50 (S2000), 10W-30 (S2000) |
| Engine oil volume, liters | 3.8 / 4.8 (S2000) |
| Oil change is carried out, km | 10,000 (better 5,000) |
| Engine operating temperature, °C | 90-95 |
| Engine life, thousand km | 300+ |
| Tuning – potential, hp | 600+ (S2000) |
| Motor installed | Honda Accord, Honda Odyssey, Honda Prelude, Honda S2000 |
Design
The F22 block is covered with a single-shaft SOHC head, but with 4 valves per cylinder. These heads have no VTEC system, with few exceptions. The diameter of the intake valves is 34 mm, and the exhaust valves are 29 mm. F22 uses a belt, replacement of the timing belt is necessary every 90 thousand kilometers. In case of its breakage, the F22B motor bends valves.
One should not forget about valve adjustment, it is required after every 40-50 thousand kilometers. Valve clearances (cold engine) F22B/F22A: intake 0.23-0.28 mm, exhaust 0.28-0.33 mm. Clearances for F22B DOHC: intake 0.07-0.11 mm, exhaust 0.15-0.19 mm.
Along with the regular F22A and F22B there was also a sporty motor, which has little in common with the F-series – F22C1. This engine was developed on the basis of even more evil atmospheric F20C.
The F22C1 was fitted to the Honda S2000 for the North American market. Unlike the 2-liter engine, it uses a longer stroke crankshaft 90.7 mm, connecting rods 149.65 mm long and pistons 29 mm high, but slightly different from the F20C, the compression ratio is reduced to 11.1. The height of the cylinder block is 224 mm.
This increased displacement to 2.2 liters.
The F22C head is similar to the F20C, but new camshafts with 296/296 phase and 12.37/12.06 mm lift have been used. The F22C also has a heavier flywheel, weighing 9.5 kg. Otherwise, these motors are the same.
The F22 engine belongs to the F family and has related models with a different displacement: F18, F20 and F23. Together with F engines, Honda produced a very close technically sporty series H, which included H22 and H23.
The Honda F22 engine was produced until 2000, then it was replaced by the K20A. The S2000 F22C1 motor was produced until 2009.
Modifications of the Honda F22 engine
- F22A1 – motor for Accord and Prelude, compression ratio 8.8. Power is 125 hp at 5200 rpm for Accord and 10 hp more for American Prelude, which is achieved by adjusting the control unit.
- F22A3/F22A7 – version for the European market, compression ratio 9.8, camshafts from F22A6, exhaust from F22A4, 150 hp at 5900 rpm.
- F22A4 – F22A1 analog with a different exhaust, 130 hp at 5200 rpm.
- F22A6 – analog of F22A1, but with a different intake, exhaust, camshaft and corresponding control unit tuning. Power is increased to 140 hp at 5600 rpm.
- F22A9 – F22A6 analog for Australia.
- F22B – Analogous to the F22A and H23A, but with a twin-shaft cylinder head and a compression ratio of 9.3. These DOHC motors develop 160 hp at 6000 rpm.
- F22B1 – Analogous to the F22A, but the heads of these engines are equipped with a VTEC system tuned for fuel economy.
- F22C1 is the top-end variant of the F22 motor, which is described at the beginning of the article.
Honda F22B/F22C engine problems
F-series motors are similar to H-motors, so their problems are repeated. You can learn about them here.
The F22C engine problems from the S2000 are also written there, it’s slightly different from the F20C and doesn’t have the plate problems, but otherwise they are very close.
Honda F22B/F22C engine tuning
Atmospheric
You can increase the power of the F22A by installing a cold intake, intake manifold from the H23A, 68mm throttle, 4-2-1 manifold and 63mm exhaust. This will make ~15hp.
To get 200+ hp at the flywheel, you need a ported cylinder head with bronze guides, stiff springs, tuned valves and plates. You also need a Bisimoto level 2 (or worse) camshaft, split pinion, 11 compression pistons, lightweight connecting rods, lightweight flywheel, H22A injectors.
On the F22B you can put the head from H22A with all the attachments, but it is better to immediately weld H22A Euro R.
F22B / F22C ENGINE RATING: 4 / 5
0 Comments