Mazda B engine
Encyclopedia
The Mazda
B-series engine is a small-sized, iron-block, inline four-cylinder
with belt-driven
SOHC and DOHC valvetrain ranging in displacement from 1.1L to 1.8L. It was used from front-wheel drive economy applications to the turbocharged full-time 4WD
323 GTX and rear-wheel drive Miata as well as numerous other models. The Mazda B-series is a "non-interference" design, meaning that breakage of its timing belt
does not result in damage to valves or pistons, because the opening of the valves, the depth of the combustion chamber
and (in some variants) the shaping of the piston crown allow sufficient clearance for the open valves in any possible piston position.
and later model Kia Pride in European and Asian markets. A fuel-injected variant was used in select European market 1991-1995 Mazda 121
s
GT-X and GT-A (1989.03-1993.01, GT-A from March 1991). It developed 88 PS at 7,000 rpm and was equipped with Mazda's "EGi" single-point fuel injection. It was a short-stroke version of the B5/B6 engines.
, the 1987–1989 Mazda Familia
and its derivatives, as well as the Mazda 121 (also known as Autozam Revue) (54 hp and 72 hp version), and the 1987–1989 Ford Laser
, and 1994–1997 Ford Aspire. Later variants were used in the Mazda Demio
microcar as late as 1999.
Horsepower: Fuel-injected 63 hp @ 5000 rpm torque: 73 ft.lbf @ 3000 rpm carburated 58 hp
Later versions (Mazda 323 91-98 etc.) produced 73 hp at 5,500 rpm, and 80 ft.lbf of torque at 4,000 rpm
, the 1987-1989 Ford Laser
. It was also fitted to the Mazda Étude
coupé and fifth-generation BF-series Familia Wagon, as it continued in production until 1994 along the new BG. Dog
for several of their cars as well as in the Mazda Demio
.
S. Power output is 120 PS at 6,500 rpm and 13.5 kgm at 5,500 rpm. The Timor S515i also used a B5D, with 110 PS at 5,500 rpm and 145 Nm at 4,400 rpm without variable valve timing and with a 9.2:1 compression ratio. The B5D was also found in the Autozam AZ-3, a Japanese market version of the Mazda MX-3
, where it produced 120 PS.
, the 1992 Mazda MX-3
, and the 1985-1990 Ford Laser
.
In Japan, the United Kingdom, and Australia a fuel-injected version called the B6F was available. Kia's version of the B6 had a marginally shorter stroke (at 83.4 mm), for a total displacement of 1,594 cc. This engine was used in the Rio
, Sephia II
, and Shuma.
. The B6-ME produced 88 hp
(66 kW) and 96 ft·lbf
(130 N·m). A carburetted version was used in 4WD versions of Japanese market BG Familias, where it produced 91 PS at 6,500 rpm and 13 kgm at 3,000 rpm.
BFMR/BFMP (turbo), 1985-1989 Ford Laser
TX3 turbo, and 1991-1994 Mercury Capri
XR2. This engine was most commonly found mated to a 4WD drivetrain although FWD models were also available.
Power and torque outputs varied across markets due to emission and fuel standards. The B6T available in North America came with 132 hp and 136 lbft. The Japanese version was slightly more powerful, producing 140 PS and 19 kgm due to better intake manifold design and its ability to run 100 octane fuel. For the special rally homologation BFMR Familia GT-Ae model released in 1987, power and torque were raised to 150 PS and 20 kgm respectively through the use of a slightly different turbocharger; engine internals remained otherwise identical.
1597 cc B6D - (78.0x83.6 mm) - The same strengthened and fuel-injected 16-valve DOHC B6 but with higher compression, no turbo, and the first Mazda engine to feature VICS (Variable Inertia Charge System). Most commonly found in the 1985-1988 Japanese market Familias, Études
and Lasers, this engine was updated in 1989 with revised compression, heads and intake system (in a similar vein to the B5 DOHC) for the 1989-1991 Familia and Laser, then further refined for the 1991-1994 Mercury Capri
and 1994 to 1996, second Generation Mazda MX-3
RS. The third-generation B6D features an alloy cam cover, a VLIM (VICS) intake, had a 9:1 compression ratio and produced 107 hp (79 kW).
It came with 4 valves per cylinder (B8-ME).
It features hydraulic lash adjusters, a belt-driven cam, an 8.9:1 compression ratio, a 6,000 rpm redline, and multi-port fuel injection. Power outputs are:
, 111 lb-ft (U.S./Canadian market) at 5,300 rpm, 151 newton metre at 4,000 rpm (European markets)
and American-market 1990 Mazda Protege LX. This engine was dubbed BP-ZE and featured a forged crankshaft, piston oil squirters, a structural aluminum oil pan with cooling fins, a 7,000 rpm redline, and the Variable Inertia Charging System (VICS)
. This particular variant can be found in the following vehicles:
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.
The BPT is a turbocharged and intercooled variant of the BP. It produced 180 PS at 6,000 rpm and 24.2 kgm of torque at 4,000 rpm in JDM-spec. 95 octane rated European models only claimed 166 PS at 5,500 rpm and 219 newton metre at 3,000 rpm.
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:
GT-R (2,200 built) and GTAe (300 built).
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 cylinder head
because of the angle of the intake ports being changed). There was also a switch from the earlier problematic hydralic lifters to solid lifters. 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 mistaken to be related to VICS.
Applications:
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:
Mazda
is a Japanese automotive manufacturer based in Fuchū, Aki District, Hiroshima Prefecture, Japan.In 2007, Mazda produced almost 1.3 million vehicles for global sales...
B-series engine is a small-sized, iron-block, inline four-cylinder
Straight-4
The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....
with belt-driven
Timing belt
A timing belt, or cam belt , is a part of an internal combustion engine that controls the timing of the engine's valves. Some engines, such as the flat-4 Volkswagen air-cooled engine, and the straight-6 Toyota F engine use timing gears...
SOHC and DOHC valvetrain ranging in displacement from 1.1L to 1.8L. It was used from front-wheel drive economy applications to the turbocharged full-time 4WD
Four-wheel drive
Four-wheel drive, 4WD, or 4×4 is a four-wheeled vehicle with a drivetrain that allows all four wheels to receive torque from the engine simultaneously...
323 GTX and rear-wheel drive Miata as well as numerous other models. The Mazda B-series is a "non-interference" design, meaning that breakage of its timing belt
Timing belt
A timing belt, or cam belt , is a part of an internal combustion engine that controls the timing of the engine's valves. Some engines, such as the flat-4 Volkswagen air-cooled engine, and the straight-6 Toyota F engine use timing gears...
does not result in damage to valves or pistons, because the opening of the valves, the depth of the combustion chamber
Combustion chamber
A combustion chamber is the part of an engine in which fuel is burned.-Internal combustion engine:The hot gases produced by the combustion occupy a far greater volume than the original fuel, thus creating an increase in pressure within the limited volume of the chamber...
and (in some variants) the shaping of the piston crown allow sufficient clearance for the open valves in any possible piston position.
B1
1138 cc B1 - (68.0x78.4 mm) - came only as a SOHC 8-valve. It was available in the 1987-1989 Mazda 121Mazda 121
The Mazda 121 name has been used on a variety of Mazda automobiles for various export markets from 1975 until 2002:* 1975–1981 — Piston engined variants of the second generation Mazda Cosmo sports car...
and later model Kia Pride in European and Asian markets. A fuel-injected variant was used in select European market 1991-1995 Mazda 121
Mazda 121
The Mazda 121 name has been used on a variety of Mazda automobiles for various export markets from 1975 until 2002:* 1975–1981 — Piston engined variants of the second generation Mazda Cosmo sports car...
s
BJ
The 1290 cc BJ engine (78.0x67.5 mm) was a DOHC 16-valve engine, used only in the Japanese market Ford FestivaFord Festiva
The Ford Festiva is a subcompact car that was marketed by the Ford Motor Company between 1986 and 2002. Built by Mazda in Japan and Kia Motors in South Korea, the Festiva was sold in Japan, the Americas, and Australasia...
GT-X and GT-A (1989.03-1993.01, GT-A from March 1991). It developed 88 PS at 7,000 rpm and was equipped with Mazda's "EGi" single-point fuel injection. It was a short-stroke version of the B5/B6 engines.
B3
1324 cc B3 – (71.0×83.6 mm). It was available in SOHC and DOHC variants and was found in the Kia-built 1988–1993 Ford FestivaFord Festiva
The Ford Festiva is a subcompact car that was marketed by the Ford Motor Company between 1986 and 2002. Built by Mazda in Japan and Kia Motors in South Korea, the Festiva was sold in Japan, the Americas, and Australasia...
, the 1987–1989 Mazda Familia
Mazda Familia
Mazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
and its derivatives, as well as the Mazda 121 (also known as Autozam Revue) (54 hp and 72 hp version), and the 1987–1989 Ford Laser
Ford Laser
The 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
, and 1994–1997 Ford Aspire. Later variants were used in the Mazda Demio
Mazda Demio
The Mazda Demio is a subcompact car manufactured by Mazda introduced in 1996, now in its third generation, marketed globally also as the Mazda2 — and previously marketed under nameplates including Mazda 121, Mazda Metro and Ford Festiva Mini Wagon.The third generation Demio earned the 2008...
microcar as late as 1999.
Horsepower: Fuel-injected 63 hp @ 5000 rpm torque: 73 ft.lbf @ 3000 rpm carburated 58 hp
Later versions (Mazda 323 91-98 etc.) produced 73 hp at 5,500 rpm, and 80 ft.lbf of torque at 4,000 rpm
- 1988–1993 Ford FestivaFord FestivaThe Ford Festiva is a subcompact car that was marketed by the Ford Motor Company between 1986 and 2002. Built by Mazda in Japan and Kia Motors in South Korea, the Festiva was sold in Japan, the Americas, and Australasia...
/Mazda 121Mazda 121The Mazda 121 name has been used on a variety of Mazda automobiles for various export markets from 1975 until 2002:* 1975–1981 — Piston engined variants of the second generation Mazda Cosmo sports car... - 1985– Kia Pride
- Autozam RevueAutozam RevueThe Autozam Revue/mazda 121 was a subcompact car from Mazda's Autozam marque, introduced in 1988. The demise of that marque led to the cars being renamed the Mazda Revue in some markets...
/Mazda 121 - 1986-1989 Mazda FamiliaMazda FamiliaMazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
/323 - 1995-1999 Mazda DemioMazda DemioThe Mazda Demio is a subcompact car manufactured by Mazda introduced in 1996, now in its third generation, marketed globally also as the Mazda2 — and previously marketed under nameplates including Mazda 121, Mazda Metro and Ford Festiva Mini Wagon.The third generation Demio earned the 2008...
- 1994-1997 Ford Aspire/Kia Avella
- 1987-1989 Ford LaserFord LaserThe 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
- 1991-1993 Sao PenzaSao PenzaThe Sao Penza was a car sold in the United Kingdom between 1991 and 1993 by Automotive Holdings, a subsidiary of Mazda Cars Ltd, the official UK importer. It was simply a rebadged version of the Mazda 323, imported from South Africa, where the 1985 model was still assembled by Samcor...
B5
| Power | Torque | Norm | Fuel system |
Fitment | Markets | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| PS | kW | at rpm | kgm | Nm | lbft | at rpm | ||||
| 8V SOHC |
B5 | 76 PS | 6,000 | 11.4 kgm | 3,500 | JIS net | carb | 1987-1989 Familia BF/Ford Laser KE, 1987-1994 Familia BF Wagon, 1988.07-1989.02 Mazda Étude Mazda Étude The Mazda Étude was originally a luxurious three door hatchback coupé version of the BF Mazda Familia/323, only ever marketed in Japan... |
JDM, NZ | |
| 73 PS | 5,700 | 11.4 kgm | 3,200 | ECE | Familia BF Wagon | EU | ||||
| 82 PS | 5,500 | 12.2 kgm | 2,500 | Timor S515 | RI Indonesia Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an... |
|||||
| 88 PS | 5,000 | 13.8 kgm | 4,000 | DIN | EGI | 1992-1997 2nd gen. Ford Festiva | Aus Australia Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area... |
|||
| 16V SOHC |
B5-M | 91 PS | 6,500 | 12.4 kgm | 4,000 | JIS net | carb | 1989.02-1991.01 Familia BG, 1989-1994 Ford Laser Ford Laser The 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the... KF/KH |
JDM, NZ | |
| B5-MI | 88 PS | 6,500 | 12 kgm | 4,000 | JIS net | EGI-S | 1991-1998 Autozam Revue Autozam Revue The Autozam Revue/mazda 121 was a subcompact car from Mazda's Autozam marque, introduced in 1988. The demise of that marque led to the cars being renamed the Mazda Revue in some markets... |
JDM | ||
| 94 PS | 6,500 | 12.5 kgm | 4,000 | JIS net | 1990.02-1994.06 Familia BG | JDM | ||||
| B5-ME | 80 PS | 5,500 | 12.2 kgm | 2,500 | ECE | EFI Fuel injection Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s.... |
1992-1997 Kia Sephia | EU | ||
| 88 PS | 5,500 | 13.5 | 132 | 98 | 2,500 | JIS net KS |
1992-1994 Kia Sephia | RoK South Korea The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south... , others |
||
| 92 PS | ||||||||||
| 100 PS | 6,300 | 12.1 kgm | 5,000 | JIS net KS |
1993-2000 Ford Festiva/Kia Avella | JDM, RoK, others |
||||
| 100 PS | 6,000 | 13 kgm | 4,500 | JIS net | 1996-2002 Demio Mazda Demio The Mazda Demio is a subcompact car manufactured by Mazda introduced in 1996, now in its third generation, marketed globally also as the Mazda2 — and previously marketed under nameplates including Mazda 121, Mazda Metro and Ford Festiva Mini Wagon.The third generation Demio earned the 2008... /Ford Festiva Mini Wagon |
JDM | ||||
| 16V DOHC |
B5-DE | 105 PS | 5,500 | 15 kgm | 4,000 | KS | EFI | 1992-1997 Kia Sephia, Timor S515i DOHC | RoK, RI, others |
|
| 110 PS | 6,500 | 12.9 kgm | 5,500 | JIS net | 1989-1994 Familia BG and Astina, 1989-1994 Ford Laser Ford Laser The 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the... KF/KH |
JDM | ||||
8-valve
1498 cc B5 - (78.0x78.4 mm) - The SOHC 8-valve B5 upped the displacement to 1.5 L and was found in the 1987-1989 Mazda FamiliaMazda Familia
Mazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
, the 1987-1989 Ford Laser
Ford Laser
The 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
. It was also fitted to the Mazda Étude
Mazda Étude
The Mazda Étude was originally a luxurious three door hatchback coupé version of the BF Mazda Familia/323, only ever marketed in Japan...
coupé and fifth-generation BF-series Familia Wagon, as it continued in production until 1994 along the new BG. Dog
16-valve SOHC
There was also a 16-valve, SOHC B5-MI version of the B5, usually fitted with single-point fuel injection ("EGi"). This engine was mainly used in the Japanese domestic market. The B5-ME, equipped with electronic fuel injection, was used by KiaKia Motors
Kia Motors , headquartered in Seoul, is South Korea's second-largest automobile manufacturer, following the Hyundai Motor Company, with sales of over 1.4 million vehicles in 2010...
for several of their cars as well as in the Mazda Demio
Mazda Demio
The Mazda Demio is a subcompact car manufactured by Mazda introduced in 1996, now in its third generation, marketed globally also as the Mazda2 — and previously marketed under nameplates including Mazda 121, Mazda Metro and Ford Festiva Mini Wagon.The third generation Demio earned the 2008...
.
16-valve DOHC
1498 cc B5D - (78.0x78.4 mm) - A Japanese-only variant of the B5 with fuel injection and revised head/intake system. Found in the 1989-1994 BG Familia and Ford LaserFord Laser
The 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
S. Power output is 120 PS at 6,500 rpm and 13.5 kgm at 5,500 rpm. The Timor S515i also used a B5D, with 110 PS at 5,500 rpm and 145 Nm at 4,400 rpm without variable valve timing and with a 9.2:1 compression ratio. The B5D was also found in the Autozam AZ-3, a Japanese market version of the Mazda MX-3
Mazda MX-3
The Mazda MX-3 is a four-seat hatchback coupé first introduced at the Geneva Motor Show in March 1991. The MX-3 was marketed as the Mazda MX-3 Precidia in Canada, the Eunos 30X in Australia, and as the Eunos Presso, Autozam AZ-3 and Mazda AZ-3 in Japan.The MX-3 is quite popular for modification...
, where it produced 120 PS.
- Later Familia 'Interplay X' versions (1994 on) have a B5-ZE engine which produces 125 PS at 7,000 rpm and 13.2 kgm at 6,000 rpm This was also installed in the Japanese market "Ford Laser"-badged versions of the Familia.
B6
1597 cc B6 — (78.0x83.6 mm) — This was a bored-out version of the B3. The 8-valve SOHC B6 was found in the 1985-1989 and 1990-1994 Mazda 323, the 1987-1990 Mercury TracerMercury Tracer
The Mercury Tracer is a compact car that was sold by the Mercury division of Ford Motor Company. It was based on the platform of the Mazda 323, replacing the European-derived Mercury Lynx. The 1991 and newer car is the Mercury version of the Ford Escort....
, the 1992 Mazda MX-3
Mazda MX-3
The Mazda MX-3 is a four-seat hatchback coupé first introduced at the Geneva Motor Show in March 1991. The MX-3 was marketed as the Mazda MX-3 Precidia in Canada, the Eunos 30X in Australia, and as the Eunos Presso, Autozam AZ-3 and Mazda AZ-3 in Japan.The MX-3 is quite popular for modification...
, and the 1985-1990 Ford Laser
Ford Laser
The 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
.
In Japan, the United Kingdom, and Australia a fuel-injected version called the B6F was available. Kia's version of the B6 had a marginally shorter stroke (at 83.4 mm), for a total displacement of 1,594 cc. This engine was used in the Rio
Kia Rio
The Kia Rio is a series of subcompact automobiles produced by Kia Motors since August 2000. Two generations have been produced, both in five-door hatchback and four-door sedan body styles, all equipped with inline-four gasoline and diesel engines, and front-wheel drive...
, Sephia II
Kia Sephia
The Kia Sephia is a compact car that was manufactured by the South Korean automaker Kia Motors from September 1992 to 2003. The name "Sephia" is an acronym of these words: "style", "elegant", "powerful", "hi-tech", "ideal", and "auto"....
, and Shuma.
B6-2E
1597 cc B6-2E - (78.0x83.6 mm), also known as B6-ME - This was a variant of the B6-E with a SOHC 16-valve cylinder head. It is found in the 1992-1994 California-spec Mazda 323 and 1991-1994 Mazda MX-3Mazda MX-3
The Mazda MX-3 is a four-seat hatchback coupé first introduced at the Geneva Motor Show in March 1991. The MX-3 was marketed as the Mazda MX-3 Precidia in Canada, the Eunos 30X in Australia, and as the Eunos Presso, Autozam AZ-3 and Mazda AZ-3 in Japan.The MX-3 is quite popular for modification...
. The B6-ME produced 88 hp
Horsepower
Horsepower is the name of several units of measurement of power. The most common definitions equal between 735.5 and 750 watts.Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation. The unit was widely adopted to measure the...
(66 kW) and 96 ft·lbf
Foot-pound force
The foot-pound force, or simply foot-pound is a unit of work or energy in the Engineering and Gravitational Systems in United States customary and Imperial units of measure. It is the energy transferred on applying a force of 1 pound-force through a displacement of 1 foot...
(130 N·m). A carburetted version was used in 4WD versions of Japanese market BG Familias, where it produced 91 PS at 6,500 rpm and 13 kgm at 3,000 rpm.
B6T
1597 cc B6T - (78.0x83.6 mm) - The ubiquitous turbocharged, fuel-injected and intercooled 16-valve DOHC B6, released in 1985 and used in numerous models worldwide including the 1985-1989 Mazda FamiliaMazda Familia
Mazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
BFMR/BFMP (turbo), 1985-1989 Ford Laser
Ford Laser
The 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
TX3 turbo, and 1991-1994 Mercury Capri
Mercury Capri
-First Generation :See also Ford CapriThe Mercury Capri was built in Cologne, Germany, and was sold through Lincoln-Mercury dealers in North America. The European Capri was first sold in the US in April 1970 and carried the Mercury marque identification as Ford already had a Mustang for the same...
XR2. This engine was most commonly found mated to a 4WD drivetrain although FWD models were also available.
Power and torque outputs varied across markets due to emission and fuel standards. The B6T available in North America came with 132 hp and 136 lbft. The Japanese version was slightly more powerful, producing 140 PS and 19 kgm due to better intake manifold design and its ability to run 100 octane fuel. For the special rally homologation BFMR Familia GT-Ae model released in 1987, power and torque were raised to 150 PS and 20 kgm respectively through the use of a slightly different turbocharger; engine internals remained otherwise identical.
B6D
Mazda Étude
The Mazda Étude was originally a luxurious three door hatchback coupé version of the BF Mazda Familia/323, only ever marketed in Japan...
and Lasers, this engine was updated in 1989 with revised compression, heads and intake system (in a similar vein to the B5 DOHC) for the 1989-1991 Familia and Laser, then further refined for the 1991-1994 Mercury Capri
Mercury Capri
-First Generation :See also Ford CapriThe Mercury Capri was built in Cologne, Germany, and was sold through Lincoln-Mercury dealers in North America. The European Capri was first sold in the US in April 1970 and carried the Mercury marque identification as Ford already had a Mustang for the same...
and 1994 to 1996, second Generation Mazda MX-3
Mazda MX-3
The Mazda MX-3 is a four-seat hatchback coupé first introduced at the Geneva Motor Show in March 1991. The MX-3 was marketed as the Mazda MX-3 Precidia in Canada, the Eunos 30X in Australia, and as the Eunos Presso, Autozam AZ-3 and Mazda AZ-3 in Japan.The MX-3 is quite popular for modification...
RS. The third-generation B6D features an alloy cam cover, a VLIM (VICS) intake, had a 9:1 compression ratio and produced 107 hp (79 kW).
B6ZE(RS)
1597 cc B6ZE(RS) - (78x83.6 mm) - Developed for the Mazda Miata (1989–93). The engine uses a DOHC 16-valve alloy head with a lightened crankshaft and flywheel to allow a 7,200 rpm redline. An aluminum sump with cooling fins is an unusual feature of this engine. The Japanese version of the engine had a 9.4:1 compression ratio and produced 120 hp (90 kW) and 100 ft·lbf (136 N·m).B8
The 1839 cc B8 is not just a bored and stroked B6. Rather, it uses a new block with widened cylinder spacing. The bore is 83 mm and the stroke is 85 mm. This SOHC engine was used in various Australian Mazda 323s, the American 1990-1994 Mazda Protege, and in Canadian variants of the 323 hatchback.It came with 4 valves per cylinder (B8-ME).
It features hydraulic lash adjusters, a belt-driven cam, an 8.9:1 compression ratio, a 6,000 rpm redline, and multi-port fuel injection. Power outputs are:
, 111 lb-ft (U.S./Canadian market) at 5,300 rpm, 151 newton metre at 4,000 rpm (European markets)
BP
The 1839 cc BP is a dual-overhead variant of the B8. It was first found in the 1989 Mazda FamiliaMazda Familia
Mazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
and American-market 1990 Mazda Protege LX. This engine was dubbed BP-ZE and featured a forged crankshaft, piston oil squirters, a structural aluminum oil pan with cooling fins, a 7,000 rpm redline, and the Variable Inertia Charging System (VICS)
Variable Length Intake Manifold
In internal combustion engines, a variable length intake manifold , or variable intake manifold is an automobile internal combustion engine manifold technology...
. 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)
- 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 TracerMercury TracerThe Mercury Tracer is a compact car that was sold by the Mercury division of Ford Motor Company. It was based on the platform of the Mazda 323, replacing the European-derived Mercury Lynx. The 1991 and newer car is the Mercury version of the Ford Escort....
LTS - 1995-1997 Kia SephiaKia SephiaThe Kia Sephia is a compact car that was manufactured by the South Korean automaker Kia Motors from September 1992 to 2003. The name "Sephia" is an acronym of these words: "style", "elegant", "powerful", "hi-tech", "ideal", and "auto"....
RS, LS, GS - 1994-1998 Mazda FamiliaMazda FamiliaMazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
(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.
BPT
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
Mazda MX-5
The MX-5, also known as Miata in North America and Eunos Roadster in Japan, is a lightweight two-seater roadster, of front-engine, rear-wheel drive layout, built by Mazda in Hiroshima, Japan. The model was introduced in 1989 at the Chicago Auto Show...
Miata models.
Applications:
- 1989-1994 Mazda FamiliaMazda FamiliaMazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
GT-X (Japan) - 1989-1994 Ford LaserFord LaserThe 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
TX3 turbo (Australia) - Ford LaserFord LaserThe 1985 KC Laser/GC Meteor was the model's first major redesign. All body styles were carried over, with the addition of a station wagon from 1986. A new "TX3" variant, which was half-way between "GL" & "Ghia" in specification level, replaced the "Sport" variant from the KB series. Unlike the...
GT-X
BPD
The mazda BPD engine (also commonly referred to as a BP2) was a revamp of the original BP engine (sometimes called BP1 for clarity's sake). It featured a larger crank nose, larger piston oil squirters, a main bearing support plate, better flowing inlet and exhaust ports. This was also the base engine for the Mazda Familia GT-R and GT-Ae. It is commonly known as the 'big turbo' variant as it utilised a much larger IHI RHF6CB watercooled turbocharger(vj23). The BPD was used as the basis for the engine, with changes such as sodium filled exhaust valves, larger (and front-mounted) intercooler, larger (440 cc) low impedance fuel injectors and stronger engine internals helping to up the performance of the engine to produce 209 hp (156 kW) and 184 ft·lbf (255 N·m).The VICS system of the N/A BP has been removed, as well as the boost cut from the ecu. This engine was designed to power Mazda to a world rally championship win, and was thus used in the limited production Mazda FamiliaMazda Familia
Mazda's automotive plans for the early sixties consisted of growing alongside the Japanese economy. To achieve this goal, they began by building an extremely cheap Kei car, the R360 in 1960, planning on introducing gradually larger and pricier cars as the Japanese customers became able to afford them...
GT-R (2,200 built) and GTAe (300 built).
BP-4W
The 1999 Miata uses a modified BP, the BP-4W, which replaces the old Hall EffectHall effect
The Hall effect is the production of a voltage difference across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current...
dual Cam Angle Sensor unit mounted at the back of the exhaust cam with two separate Hall Effect
Hall effect
The Hall effect is the production of a voltage difference across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current...
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 cylinder head
Cylinder head
In an internal combustion engine, the cylinder head sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket...
because of the angle of the intake ports being changed). There was also a switch from the earlier problematic hydralic lifters to solid lifters. 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 mistaken to be related to VICS.
Applications:
- 1999-2000 Mazda MX-5/Miata
- 2004-2005 Mazdaspeed MX-5 (turbo)
BP-Z3
In 2001, Mazda introduced the still 1839 cc BP-Z3 (also called BP-VE) variant of the BP engine. It features S-VTS-VT
S-VT, or Sequential Valve Timing, is an automobile variable valve timing technology developed by Mazda. S-VT varies the timing of the intake valves by using hydraulic pressure to rotate the camshaft. S-VT was introduced in 1998 on the ZL-DE engine and is used in the B-, Z-, MZR- and J-families of...
variable valve timing
Variable valve timing
In internal combustion engines, variable valve timing , also known as Variable valve actuation , is a generalized term used to describe any mechanism or method that can alter the shape or timing of a valve lift event within an internal combustion engine...
on the intake side, no more VICS
VICS
VICS or Vics may stand for:* Variable Inertia Charging System, a variant of variable length intake manifold* Vehicle Information and Communication System* Northwich Victoria F.C., nicknamed "The 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
Mazda Z engine
The Mazda Z-series is a smaller inline 4-cylinder gasoline engine ranging in displacements from 1.3L to 1.6L. They are the evolution of the cast-iron block B-engine....
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
Mazda MX-5
The MX-5, also known as Miata in North America and Eunos Roadster in Japan, is a lightweight two-seater roadster, of front-engine, rear-wheel drive layout, built by Mazda in Hiroshima, Japan. The model was introduced in 1989 at the Chicago Auto Show...
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-5Mazda MX-5The MX-5, also known as Miata in North America and Eunos Roadster in Japan, is a lightweight two-seater roadster, of front-engine, rear-wheel drive layout, built by Mazda in Hiroshima, Japan. The model was introduced in 1989 at the Chicago Auto Show...
SP (Australian turbo)