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Toyota 1JZ-GTE Engine

 

1JZ-GTE was introduced in 1990 to be used in Toyota Supra GT, Toyota, Toyota Chaser, Toyota Cresta, and Toyota Mark II models. In 1991 Soarer GT also received 1JZ-GTE engine. The engine was longitudinally mounted in all models because of inline 6 piston configuration. 1JZ-GTE was displacing 2491cc with 86mm bore x 71.5mm stroke. Cast iron block was housing aluminum alloy pistons that had 8.5:1 compression ratio. Aluminium alloy head utilized pent roof combustion chambers and direct fire ignition for increased combustion efficiency. Belt driven dual head cams were running four valves per cylinder. 380cc/min high impedance injectors were used to feed the engine with necessary amount of fuel. 1JZ-GTE’s produced until 1996 were equipped with parallel mounted twin CT12A turbochargers and were breathing through a front-mount air-to-air intercooler. CT12A turbochargers employed ceramic turbine wheels which were prone to delamination, however this problem was solved in later models. Toyota declared that the 1JZ-GTE delivered was 280hp at 6200 RPM and 363Nm of torque at 4800 rpm.

 

 

 

Toyota 1JZ-GTE

 

In 1996 1JZ-GTE received major revisions. Both cam shafts were now featuring Toyota’s variable valve timing mechanism, VVT-i. Water jackets were modified for improved cylinder cooling and cam friction was reduced with titanium nitride coating. Twin CT12A turbochargers were replaced by a single CT15B unit. To suit the new turbocharger, exhaust manifold and head design were also revised. These improvements did not increase the power output of since 1jz-GTE was already putting out 280hp -which was the limit according to a gentleman’s agreement among Japanese automobile manufacturers- however the torque was increased to 379Nm at 2400rpm. Engine efficiency was also affected from these changes. Reworked 1JZ-GTE was consuming 10% less fuel compared to earlier version.

 

Toyota placed updated 1JZ-GTE engine in Chaser, Mark II, Cresta, Verossa Crown Athlete V, and Soarer models. The production of 1JZ-GTE ceased in 2007.

 

Model

1JZ-GTE

Displacement (cc)

2491

Power Output (hp)

280

Compression Ratio

8.5:1 - 9.0:1

Bore (mm)

86.0

Stroke (mm)

71.5

Years Produced

1990 - 2007

 

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