The Toyota FZ engine was a 24-valve, 4477 cc DOHC straight-6 internal combustion engine manufactured by Toyota to replace the F-series engine. It was used primarily in SUVs because of its large displacement, smoothness, ruggedness and torque.

Technical data

The engine displaced 4477 cc with a bore and stroke measuring 100x95 mm, respectively and a 9.0:1 compression ratio; the head used Toyota's narrow-angle overhead camshafts for better fuel economy. The 1FZ had only two variants available: the 1FZ-F and the 1FZ-FE. The only significant difference between the two was the inclusion of electronic fuel injection on the 1FZ-FE, whereas the 1FZ-F used a carburetor. The 1FZ-F produced 188 hp at 4400 rpm and 268 lbft at 2800 rpm; its fuel injected counterpart produced 212 hp at 4600 rpm and 275 lbft at 3200 rpm. Starting in 1998, the fuel injected version (1FZ-FE) was updated in certain non-US markets. This version of the engine received many updates over the previous version such as a redesigned head, more compact pistons, updated throttle body, an improved intake manifold with longer intake runners, 4 nozzle fuel injectors to improve fuel atomization and direct ignition (via a wasted spark set-up with three dual outlet coils); the engine pictured here is that variant discernible by the intake manifold and lack of distributor. This version of the 1FZ-FE produced 240 hp at 4600 rpm and 300 lbft at 3600 rpm on 91 Octane Fuel (RON) without a catalytic converter. Also, a de-rated LPG version was built for the 7FG/7FZ series forklifts. Called 1FZ-E it produced 63 kW at 2350 rpm and 294 Nm at 1200 rpm

Usage

The 1FZ-F and -FE were used in the following vehicles: