Mazda BP8 Engine

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Mazda BP8 Engine

Post by MrFamilia on Fri Jan 27, 2012 6:16 am

The 1839cc or 1.8 BP is a DOHC (dual-overhead camshaft) variant of the B8, featuring a 83mm bore and 85mm stroke and 4 valves per cylinder. This engine was called 'BP-ZE by Mazda engineers' and featured a forged crankshaft, piston oil squirters, a structural aluminum oil pan with cooling fins, a 7,000 rpm redline, and Variable Intertia Charging System VICS which is activated by a control solenoid at high rpm to increase horsepower in the upper rev range. The engine in base form on 91RON fuel produces 96KW @ 6000RPM and 165Nm @ 4000 RPM. The engine is a favourite for both N/A and turbo motoring enthusiasts for its robust design, materials and construction. This particular variant can be found in the following vehicles:

1989-1994 Mazda Familia GT (European & Australian Market)
1989-1994 Ford Laser TX3 (Australian Market)
1994-1998 [Ford Laser KJ GLXi] (Australian Market)
1990-1994 Mazda Protege LX (with VICS)
1995-1998 Mazda Protege ES (Australian Market: 1994-1998 323 Protege SE)
1990 Mazda Infini
1990-1991 and 1993 Mazda Protege GT (Canadian Market)
1990-1993 Mazda 323 (European Market)
1991-1996 Ford Escort GT and LX-E
1991-1996 Mercury Tracer LTS
1995-1997 Kia Sephia RS, LS, GS
1994-1998 Mazda Familia (Japanese Market)
1994-1997 Mazda MX-5/Miata (did not have VICS until 1999)
There is also a non-performance SOHC version that is most easily recognized by its black stamped-steel oil pan. It also features a cast crankshaft, no oil squirters, a plastic oil pickup tube and less aggressive camshafts. It is found in the 1995-1998 Mazda Protege ES.

Turbo Varient

The BPT is a turbocharged and intercooled variant of the BP. It produced 180 PS (132 kW) at 6,000 rpm and 24.2 kg·m (237 N·m; 175 lb·ft) of torque at 4,000 rpm in JDM-spec. 95 octane rated European models only claimed 166 PS (122 kW) at 5,500 rpm and 219 N·m (162 lb·ft) at 3,000 rpm.[4]

It featured an IHI RHB5 VJ20 turbocharger, sidemount intercooler, 330 cc blacktop injectors (high impedance). The standard BPT ecu had a boost cut at 14.7psi (calculated based on the air flow). The BPT versions of the Familia and Laser were only available in 4WD models, and featured an open front differential along with viscous LSD centre and rear differentials. This engine is rumoured to have been installed in some Mazda MX-5 Miata models. Applications:

1989-1994 Mazda Familia GT-X (Japan)
1989-1994 Ford Laser TX3 turbo (Australia)
Ford Laser GT-X

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MrFamilia
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