The 1.8 L (1839 cc, 112 cu in) BP is a dual-overhead variant of the B8. It was first found in the 1989 Mazda Familia and American-market 1990 Mazda Protege LX. This engine was dubbed BP-ZE and featured a forged crankshaft, piston oil squirters, an aluminum baffled oil pan, and Variable Inertia Charging System (VICS). 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)
1990-1994 Mazda Protege LX (with VICS)
1990-1991 and 1993 Mazda Protege GT (Canadian Market)
1990-1993 Mazda 323 (European Market)
1992-1993 Ford Escort LX-E
1991-1996 Ford Escort GT
1991-1996 Mercury Tracer LTS
1994-1997 Kia Sephia GS
1997 Kia Sephia RS
1994-1998 Mazda Familia (Japanese Market)
1994-1997 Mazda MX-5/Miata (this did not have VICS until 1999)
There is also a non-performance 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.


[edit] BPT
The BPT is a turbocharged and intercooled variant of the BP. It produced 179 hp (134 kW) and 174 ft·lbf (237 N·m) of torque.

The most powerful version was named the BPD. It is commonly known as the 'big turbo' variant as it utilised a much larger IHI RHF6CB turbocharger. The BPT was used as the basis for the engine, with changes such as sodium filled exhaust valves, larger (and front mounted) intercooler, bigger fuel injectors and stronger engine internals helping to up the performance of the engine to produce 206 hp (154 kW) and 184 ft·lbf (250 N·m).The VICS system of the N/A BP has been removed. This engine was designed to power Mazda to a world rally championship win, and was thus used in the limited production Mazda Familia GT-R (2200 built) and GTAe (300 built).


Mazda BPT - Turbocharged 1.8LApplications:

1989-1994 Mazda Familia GT-X (Japan)
1992-1993 (BPD) Mazda Familia GT-R / GTAe (Japan)
1989-1994 Ford Laser TX3 turbo (Australia)
Ford Laser GT-X

[edit] BP-4W
The 1999 Miata uses a modified BP, the BP-4W, which replaces the old Hall Effect dual Cam Angle Sensor unit mounted at the back of the exhaust cam with two separate Hall Effect units at the front - one on the intake cam gear and one mounted on the oil pump, to the side of the crankshaft pulley. It also has an improved intake system (a better flowing engine head because of the angle of the intake ports being changed). The United States 2004-2005 Mazdaspeed MX-5 turbo is based on this engine rather than the newer BP-Z3 and produces 178 hp (133 kW) and 166 ft·lbf (225 N·m) with slightly-reduced compression. The Mazdaspeed turbo engine has no VICS, but does have VTCS which is often considered related, but is not.

Applications:

1998-2000 Mazda MX-5/Miata
2004-2005 Mazdaspeed MX-5 (turbo)

[edit] BP-Z3
In 2001, Mazda introduced the BP-Z3 (also called BP-VE) variant of the BP engine with S-VT variable valve timing on the intake side, no more VICS, but there is Variable Tumble Control System (VTCS)in the BP-Z3. A similar looking but effectively very different set of valves that restrict the intake on cold start for emissions purposes, rather than the torque enhancing set of partial butterflies that increase velocity that are used in VICS. This was found in the 2001+ Miata. The Z family is an evolution of this engine.

In Australia, a turbocharged version of this engine produced 210 hp (157 kW) and 206 ft·lbf (280 N·m) in the Mazda MX-5 SP. The United States 2004-2005 Mazdaspeed MX-5 turbo is a BP-4W, not a BP-Z3.

Applications:

2001-2005 Mazda MX-5/Miata
Mazda MX-5 SP (Australian turbo)