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Toyota 7M engine
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| Toyota 7M | |
|---|---|
| Engine | |
| Manufacturer | Toyota |
| aka | Type aka here, not up there |
| Type | Petrol |
| Production/Introduction | 1986 - 1992 |
| Status | Discontinued |
| Displacement | 3.0 litre |
| Aspiration | Normally Aspirated (7M-GE) Turbocharged (7M-GTE & 7M-GTEU) |
| Configuration | Inline |
| Cylinders | 6 |
| Fuel System | TCCS Fuel Injection |
| Lubrification | Wet Sump |
| Output | 204 hp @ 6000 rpm 196 lb-ft. of torque @ 4800 rpm (7M-GE) 232 hp @ 5600 rpm 240 lb-ft. of torque @ 4000 rpm (7M-GTE) 267 hp @ 5600 rpm 264 lb-ft. of torque @ 4400 rpm (7M-GTEU) |
| Bore | 83 mm/3.27 in |
| Stroke | 91 mm/3.58 in |
| Compression | 9.1:1 (7M-GE) 8.4:1 (7M-GTE & 7M-GTEU) |
| In. Valves | 32mm/1.26 in |
| Ex. Valves | 27.5mm/1.08 in |
| Firing Order | 1-5-3-6-2-4 |
| Left Bank | N/A |
| Right Bank | (same as above) |
| Length | in inches |
| Diameter | in inches |
| Width | in inches |
| Height | in inches |
| Dry Weight | 210 kg/463 lbs |
| Fuel Consumption | city/highway (mpg & km/L) |
| Emission/s | CO: g/km CO2: g/km NOx: g/km Hydrocarbon: g/km Particulate: g/km |
| Chief Engineer | Yukihiko Yaguchi |
The 7M, first released in 1986, is the final evolutionary step of the M series engine, which originally debuted in 1965. They were installed in the Toyota Supra, Toyota Soarer and the Toyota Cressida. All 7M engines use a DOHC valvetrain (solid shim-over-bucket lifters), with valves spaced at a performance-oriented 50° angle. Both camshafts are driven by a single cambelt from the crankshaft. Three derivatives exist; the 7M-GE, 7M-GTE and a 7M-GTEU. The 7M was finally discontinued in 1992, supplanted by the JZ series engines in all applications.
7M-GE
Originally released in the new MkIII Toyota Supra (A70 Chassis) midway through 1986, the engine remained largely unchanged throughout it's 6 year lifespan. It used Toyota's improved TCCS EFI system, using a flapper style airflow meter and a distributor. Power was fed to the wheels via either the W58 Manual transmission used in the previous MkII Toyota Supra (A60 Chassis) or an A340E 4-speed Automatic .
7M-GTE
Introduced in 1987, the 7M-GTE block differed from its normally aspirated brother by its lower compression pistons, and included oil squirters in the block to cool the underside of the pistons, due to the increased combustion temperatures. The intake cam also differed from the 7M-GE, although the exhaust cam remained the same. A single CT-26 turbocharger was installed, and set from 4.8 to 7psi (dependant on the fitment of either an R154 Manual transmission or toughened A340E Automatic transmission). Management wise, it also used TCCS, but instead of a flapper style airflow meter, it used a Karmann Vortex style airflow meter. Likewise, instead of a distributor, a camshaft position sensor and three wasted spark ignition coils were installed.
7M-GTEU
This was a special run of the 7M, intended solely for the MkIII Toyota Supra Turbo-A in late 1988. A customised CT-26 turbocharger was installed, different inlet & exhaust camshafts with 10 degrees more duration and marginally more lift, and the management was altered again, so rather than either the flapper style airflow meter, or Karmann Vortex airflow meter, the ECU sensed manifold pressure instead. All other specifications remained unchanged from the 7M-GTE.
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