Mazda FE-DOHC Engine

Mazda FE-DOHC Engine

The Mazda FE-DOHC was the DOHC variant of the FE. The official Mazda engine codes are FE-DE and FE-ZE, depending on output level. It is still commonly called the FE3 because of its head castings. The FE-DOHC shares the same dimensions as the original FE-SOHC, including the square 86 mm bore × stroke and it has an ideal 1.74 rod/stroke ratio. The FE-DOHC is usually identified by a gold-coloured cam cover, however not always. There were at least five different FE-DOHC engines available with various compression ratio, camshaft and ECU tuning combinations, however none were fitted with a turbocharger from the factory. Despite this, the FE-DOHC is already built for turbo with large forged connecting rods, large journal dimensions, oil cooler, piston oilers, web-stiffened block with main girdles (and braceplate where equipped). This robust engine design is a favourite of tuners who are aware of its capability because it already has a high-power capacity perfect for custom turbo jobs. As much as 600 whp has been seen on a stock engine. The common FE-DOHC crankshaft is cast while the forged crankshaft is fitted to the aluminum sump engines with both the main bearing braces and the main bearing girdle plate. In European 10.0:1 compression, non-catalytic trim, the FE-DOHC produces 148 ps (108 kW) at 6000 rpm and 133 lb/ft (182 Nm) at 4000 rpm. The 9.2:1 compression, catalytic converter version produces 140 ps. The Japanese domestic market variants produce anywhere between 145 ps and 170 ps, with the late manual 4WD GV Wagon having 165 ps in certain years.