Mazda F engine

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The F engine family from Mazda is a straight-4 piston engine. This motor was found in the Mazda B-Series truck and 1984-2002 Mazda 626 families. These are entirely different engines than the Mazda B engine family.

There were four basic head types within the F range, the diesel SOHC 8-valve, the petrol SOHC 8-valve, petrol SOHC 12-valve, and the petrol DOHC 16-valve. These heads came attached to multiple variations of the different blocks and strokes. Only the petrol 8-valve and 12-valve shared the same gasket pattern.

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[edit] MA

This engine is only a predecessor to the F series engines, in no other way related.

This 2.0L (1970 cm³) was designated MA. Bore was 80 mm and stroke was 98 mm. This SOHC engine with a 2 barrel carburettor produced 103 hp (76 kW) and 123 ft·lbf (167 N m). A more fuel-efficient 1 barrel version produced 90 hp (66 kW). Fuel injection was available in 81-82. Other capacities were available in some markets, such as the F/NA 1.6L.

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[edit] F6

The smallest of the second generation of F family engines was the F6, a destroked and debored version of the base FE 2.0. It replaces the F/NA 1.6 from the previous generation. It was an 8-valve SOHC engine with an 81 mm bore and 77 mm stroke, with a compression ratio of 8.6:1. Output was 73 hp (53 kW) @ 5500 rpm and 89 ft·lbf (121 N m) @ 3500 rpm.

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[edit] F8

A destroked FE, the F8 had a capacity of 1.8 litres, and came in several configurations including a 12-valve head and fuel injection later in its life. It had a bore of 86 mm and a stroke of 77 mm, with a compression ratio of 8.6:1. Power output was 80 hp (60 kW) @ 5500 rpm and 98 ft·lbf (133 N m) @ 2500 for the 8-valve SOHC carburetted versions.

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[edit] F8-DOHC

The F8-DOHC is a destroked version of the FE-DOHC displacing 1789 cc - 1.8L. It shares the common bore of 86 mm with other F-blocks and has a shortened stroke of 77 mm. It uses the same exhaust cam, but a different intake cam with less lift and a long, single-runner intake manifold. The F8 is usually identified by its unpainted cam cover. Output was 113 hp (84 kW) @ 6000 rpm and 115 ft·lbf (156 N m) @ 5000 rpm. It is usually found in wagon variants. sup

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[edit] FE

The 2.0 L (1998 cm³) FE was very different with a square 86 mm bore and stroke. It was an 8-valve SOHC engine for front-wheel drive and rear wheel drive pickup use. Output was 90 hp (66 kW) for the 1 barrel carburetor version, 100 hp (74 kW) @ 5600 rpm & 156 N m @ 3700 rpm for the 2 barrel carburetor version, or 118 hp (88 kW) @ 5300 rpm & 178 N m @ 3700 rpm with fuel injection and higher compression (10:1 vs 8.6:1).

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[edit] FET

The 2.0 L (1998 cm³) Fuel Injected, turbocharged FET version of the FE produced 135 hp (101 kW) @ 5250 rpm and 175 ft·lbf (237 N m) @ 2800 rpm. It was a variant of the 8-valve SOHC FE Featuring a small turbocharger and no intercooler producing 7 psi of boost. As such it features the same 86 mm bore and stroke of the FE. The Japanese variant of this engine was dubbed the Magnum Turbo. Given that the peak power for the naturally aspirated, fuel injected FE is 118 hp (88 kW), the rated power for the FET is said to be conservative.

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[edit] FE-DOHC

Main article: Mazda FE-DOHC engine

The FE-DOHC was the DOHC variant of the FE. Commonly called the FE3 because of its head castings, it was used in some 626s from Europe, New Zealand and Japan; but not the U.S. or Australia. After the GD platform stopped production in 1992, FE-DOHCs continued production until the end of the GV wagon in 1997. The FE-DOHC was also produced under license by Kia for the 1995+ Kia Sportage.

The FE-DOHC shares some dimensions with the original FE, including the 86 mm bore and stroke. The FE-DOHC is usually identified by a gold cam cover, however this is not a guarantee. There were at least six different FE-DOHC engines available with various compression ratios and camshafts. Sadly, due to a lack of information in non-destined markets, some believe that the FE-DOHC is fitted with forged internals, however this is not the case. In 10.0:1 compression, non-catalytic trim, the FE-DOHC produces 148 hp (109 kW) @ 6000 rpm and 133 ft·lbf (182 N m) @ 4000 rpm. The 9.2:1 compression, catalytic converter version produces 138 hp (103 kW).

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[edit] F2

The F2 is a stroked version of the FE, introduced for the 1988-1992 GD platform cars, it can also be found in the B2200 pickup. Although available as an 8-valve SOHC in the B2200, this car is most commonly a 12-valve SOHC, with an 86 mm bore and 94 mm stroke with an 8.6:1 compression ratio. It generates 110 hp (82 kW) @ 4700 rpm and 130 ft·lbf (176 N m).

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[edit] F2T

The F2T is a turbocharged version of the F2 equipped with an IHI-supplied RHB5 VJ11 turbocharger and an air-to-air intercooler. Internally the engine retains its 86 mm bore and 94 mm stroke, but has a lower compression ratio of 7.8:1. It produces 145 hp (108 kW) @ 4300 rpm and 190 ft·lbf (257 N m)at the drive wheels. Crank shaft figures were never released. Due to the increased torque output, Mazda were forced to increase the strength of the transmission for the F2T, producing the H-type, the strongest FWD gearbox Mazda produced at the time.

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[edit] R series

The R series engines are diesel variants that are very closely related to the F series sharing the same bell housing patterns and other block fixtures and dimensions.

[edit] RF

A diesel variation of the FE which shares its 86 mm bore and stroke. It was also available with a pressure wave supercharger.

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[edit] R2

A diesel variation of the F2 which shares its 86 mm bore and 94 mm stroke.

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[edit] Later engines with 'F' nomenclature

[edit] FS

The 2.0L (1991 cm³) FS was one of the last F-family engines. With an 83 mm bore and 92 mm stroke, it produced up to 130 hp (97 kW) and 135 ft·lbf (183 N m). In 1998 the engine underwent several changes, most notably a distributorless ignition version known as the FS-DE. Japan also received a higher-performance version, known as the FS-ZE. A special version of the FS was produced in 2003 for the Mazdaspeed Protegé which was turbocharged, and generated 170 hp (127 kW) and 160 ft·lbf (217 N m).

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[edit] FP

It should be noted that the FP engine is totally unrelated to the earlier F series engines with the exception of a similar name and capacity.

The 1.8 L (1839 cm³) FP is a destroked version of the FS, with an 83 mm bore and 85 mm stroke. It produces 122 hp (91 kW) and 120 ft·lbf (163 N m). This engine is often incorrectly called the F8, which is the earlier destroked engine based on the FE. The FP enjoys a much better power band vs the FS due to slightly different camshafts and a better rod ratio over the regular FS-DE.

The FP is very close to the FS in many ways and shares a large percentage of parts but has its own FP specific block crank, rods, pistons and timing belt. The pistons for the FS produce a compression ratio of 9.1:1 (USDM) but when FP pistons are used in the FS they yield 9.7:1 compression ratio.

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