B18C Engine


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Honda B-series, first presented in 1988, are inline 4-cylinder automotive motors with dual overhead camshafts. They were for sale contemporaneously with economical D-line motors, featuring single overhead camshaft, but B-lineup had better performance thanks to double overhead camshafts and the brand’s VTEC system, which was applied for the first time. Along with letter B, the names of these motors denote engine’s displacement and have one more letter. The American versions also keep one more number in the title.

Actually, motors for Japanese market consist of 4 character alphanumeric denomination. B-lineup, and B20B model particularly, shouldn’t be confused with B20A motor, released in 1985 and employed for Prelude and Accord automobiles from 1985 to 1991. These two types of engines keep absolutely different architecture though they have some common features in styling and both are multivalve 4-cylinders.

Having a look at B18C1 motor’s name, we know that it features 1.8L displacement (as 18 signifies it). Letter C indicates the application of VTEC system, the brand’s variable valve timing. Meanwhile, the line’s motors with letter A or B after numbers don’t have this option.

Keeping an aluminum alloy cylinder head as well as the one of aluminum, B18C1 uses steel cylinder liners to increase the strength.

On the aftermarket, you may also find some other variants, featuring enhanced cylinder liners for better durability. Restyled liners may contribute to the bore increase and, consequently, assist in adding energy.

Featuring a double overhead camshaft, the motor keeps 2 intake and 2 exhausts valves per each of 4 cylinders. This is one of the most distinguishing characteristics of B-lineup, which is also the key element of its great performance.

honda b18c engine specs

B18C Specs

Manufacturer Honda Motor Company
Also called Honda B18
Production 1990-2001
Cylinder block alloy Aluminum
Configuration Inline-4
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 89 (3.50)
87.2 (3.43) – B18C
Cylinder bore, mm (inch) 81 (3.19)
Compression ratio 9.2
10.0
10.6
10.8
11.1
Displacement 1834 cc (111.9 cu in)
1797 cc (109.7 ci in) – B18C
Power output 95 kW (130 HP) at 6,000 rpm
96 kW (132 HP) at 6,000 rpm
101 kW (138 HP) at 6,200 rpm
104 kW (142 HP) at 6,500 rpm
104 kW (142 HP) at 6,300 rpm
105 kW (143 HP) at 6,300 rpm
125 kW (170 HP) at 7,600 rpm
132 kW (180 HP) at 7,200 rpm
132 kW (180 HP) at 7,300 rpm
139 kW (190 HP) at 7,900 rpm
143 kW (195 HP) at 7,800 rpm
147 kW (200 HP) at 8,000 rpm
147 kW (200 HP) at 8,200 rpm
Torque output 167 Nm (123 lb·ft) at 5,000 rpm
164 Nm (120 lb·ft) at 5,000 rpm
171 Nm (126 lb·ft) at 4,900 rpm
178 Nm (131 lb·ft) at 6,100 rpm
172 Nm (126 lb·ft) at 5,200 rpm
172 Nm (126 lb·ft) at 5,200 rpm
174 Nm (128 lb·ft) at 6,200 rpm
171 Nm (126 lb·ft) at 6,200 rpm
174 Nm (128 lb·ft) at 6,200 rpm
178 Nm (131 lb·ft) at 7,300 rpm
176 Nm (129 lb·ft) at 7,500 rpm
186 Nm (137 lb·ft) at 7,200 rpm
176 Nm (129 lb·ft) at 7,500 rpm
Redline 6,500 (B18A)
6,800 (B18B)
8,000 (B18C2)
8,100 (B18C1)
8,300 (B18C5 Type R)
8,400 (B18C6/B18C7 Type R)
HP per liter 71
72
75
78
78
94
100
105
108
111
Fuel type Gasoline
Weight, kg (lbs) 179 (394)
183 (403)
Fuel consumption, L/100 km (mpg)
-City
-Highway
-Combined
Acura Integra
9.4 (25)
7.6 (31)
8.5 (28)
Turbocharger  Naturally aspirated
Oil consumption , L/1000 km
(qt. per miles)
up to 1.0
(1 qt. per 600 miles)
Recommended engine oil 5W-30
5W-40
10W-30
10W-40
Engine oil capacity, L (qt.) 4.0 (4.2)
Oil change interval, km (miles) 5,000-10,000
(3,000-6,000)
Normal engine operating temperature, °C (F)
Engine lifespan, km (miles)
-Official information
-Real

300,000+ (180,000)
Tuning, HP
-Max HP
-No life span loss
250+

Applications

  • Honda Civic
  • Honda Integra/Acura Integra
  • Honda Domani
  • Honda Orthia

Though B18C1’s displacement is marketed as 1.8L, it actually equals to 1.797 liters (or 109.7 cu in).

The motor reaches output of 178 hp at 7,600 rpm and torque of 128 lb/ft at 6,200 rpm. These numbers really impress as they give outstanding power to weight ratio if to take into account that the engine doesn’t have a turbocharger. The revolutions limiter is launched at 8,000 rpm, but fuel may cut off at 8,000 rpm.

With the compression index of 10.1, B18C1 is supplied with VTC for the optimal opening for valves.

Additionally, the motor keeps secondary runners, opening at 5,700 rpm. The bore diameter is 3.2 inches while the stroke is 3.4 inches.

B18C Engine Problems and Reliability

Clearly, as the motor is pretty old, it fails to be perfect. At the moment of its release, it was a really durable and reliable motor, but in the course of time, the situation has changed.

Now, B18 motors have a great level of weariness and it signifies that any detail may start to malfunction. The only solution is to service your motor on time along with using high quality motor oil and fuel.

 

B18C Tuning And Upgrade Potential

If you aspire to add energy to your B18C, we have some pieces of advice for you. The easiest way to add about 10-15 hp is to substitute some performance elements. By leaving your old engine control unit, you may acquire cold air intake system, B18C 98 Spec R 4-1 header (or the aftermarket one) plus 2.5-inch exhaust system.

Seeking for higher performance, consider purchasing Skunk2 intake manifold, throttle body of 65 mm, Type R camshafts, regulable cam gears, TODA lightweight flywheel plus Hondata engine control unit. By adding all these elements, you will reach output of 210 hp.

If 210 hp isn’t enough, apply Type R pistons, ACL bearings, create port and polish along with adding ARP head studs, bigger throttle body, Skunk2 Stage 2 camshafts, Supertech valves, valve guides plus retainers. Compression index may increase more thanks to high compression pistons (CR 12+), 340 cc fuel injectors plus NGK 7 spark plugs. Thus, output will be enhanced to 230-240 hp with no turbochargers utilized.

The real performance enthusiasts won’t miss an opportunity to reach 250 hp by substituting the original cylinder block with a sleeved B20 block, installing oil jets, performance pistons and connecting rods, oil cooler plus Type R oil pump. Clearly, this job demands much time and efforts. The alternative is to purchase a Jackson Racing supercharger kit, allowing your automobile to run 0.25 mile in 13-15.5 seconds.

Dan Hoffman

Dan is a co-founder of Engineswork. He knows everything about internal combustion engines. Ask your questions in comments down below this article - he will be glad to help you anytime.

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