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.
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.
Toyota 1JZ engine specs
| Manufacturer | Tahara Plant |
| Also called | Toyota 1JZ |
| Production | 1990-2007 |
| Cylinder block alloy | Cast-iron |
| Configuration | Straight-6 |
| Valvetrain | DOHC 4 valves per cylinder |
| Piston stroke, mm (inch) | 71.5 (2.81) |
| Cylinder bore, mm (inch) | 86 (3.39) |
| Compression ratio | 8.5 9 10 10.5 11 |
| Displacement | 2492 cc (152.1 cu in) |
| Power output | 125 kW (170 HP) at 6,000 rpm 147 kW (200 HP) at 6,000 rpm 205 kW (280 HP) at 6,200 rpm 205 kW (280 HP) at 6,200 rpm |
| Torque output | 235 Nm (173 lb·ft) at 4,800 rpm 251 Nm (185 lb·ft) at 4,000 rpm 363 Nm (268 lb·ft) at 4,800 rpm 379 Nm (280 lb·ft) at 2,400 rpm |
| Redline | 7,000 (VVTi) 7,500 |
| HP per liter | 68.2 80.3 112.4 112.4 |
| Fuel type | Gasoline |
| Weight, kg (lbs) | 207 (455) |
| Fuel consumption, L/100 km (mpg) -City -Highway -Combined | for Supra Mk 3 15.0 (15) 9.8 (24) 12.5 (18) |
| Turbocharger | Naturally aspirated 2x Toyota CT12A 1x Toyota CT15B |
| Oil consumption , L/1000 km (qt. per miles) | up to 1.0 (1 qt. per 750 miles) |
| Recommended engine oil | 0W-30 5W-20 5W-30 10W-30 |
| Engine oil capacity, L (qt.) | 4.8 (5.1) |
| Oil change interval, km (miles) | 5,000-10,000 (3,000-6,000) |
| Normal engine operating temperature, °C (F) | ~90 (195) |
| Engine lifespan, km (miles) -Official information -Real | – 400,000+ (250,000) |
| Tuning, HP -Max HP -No life span loss | 1000+ ~400 |
| The engine is installed in | Toyota Crown Toyota Mark II Toyota Supra Toyota Brevis Toyota Chaser Toyota Cresta Toyota Mark II Blit Toyota Progres Toyota Soarer Toyota Tourer V Toyota Verossa |
Toyota 2JZ-GTE Engine
The most powerfull version of all JZ series, 2JZ GTE is best known for powering MK IV Toyota Supra. However originally it was built to homologate Toyota Aristo for the Japanese Grand Touring Car Championship (JGTC). 2JZ-GTE was based on the non-turbo inline-6 engine, 2JZ-GE. Same cast iron block and connecting rods were used, but 2JZ-GTE was updated with forged pistons that have 8.5:1 compression, a forged crankshaft , oil spray bars to increase cooling abilities of the pistons and most importantly sequential twin turbos. DOHC Aluminum alloy head was completely redesigned with bigger inlet and outlet ports, bigger valves, wilder cams. For better combustion efficiency at higher engine speeds, distributor was replaced with coil over plugs.
The sequential structure of the 2JZ-GTE’s twin turbos had great effect on the engine response. Traditional parallel structured twin turbos do nothing to compensate the lag created by adding not one but two turbos onto a naturally aspirated power plant. By running sequential turbos, 2JZ-GTE could produce power earlier and with more linearity than a similar parallel structure. As power increases from idle all the exhaust gases flow through the turbine of the first turbo. This creates enhanced power by as early as 1800 RPM and greatly reduces turbo lag. As engine speed increases towards 4000 RPM some exhaust begins to split from the first turbo towards the turbine of the second turbo. At this stage the second turbo enters a ‘pre-spool’ stage as it the blades begin to spin but do not add any additional power. When engine speed hits 4500 RPM exhaust begins to fully divide into an even flow between the two turbos as they both approach full spool.
With sequential twin turbos and an intercooler JDM spec 2JZ-GTE was easily reaching 280hp. North American and European spec engines were equipped with bigger injectors and different turbos. These changes enabled the engine to deliver an output of 320hp. The differences between two versions are as follows.
JDM
CT12B turbos with ceramic blades
440 cc/min fuel injectors
Camshaft construction
North American & European
CT20A turbos with stainless steel blades
550 cc/min fuel injectors
Camshaft construction
Toyota's variable valve timing, VVT-i was introduced in 1997. Introduction of VVT-i did not have any effect on power output, but the engine efficiency was improved. Production of 2JZ-GTE ended in 2001 along with MK IV Toyota Supra.
2JZ-GTE is famous for its power potential. Both the crankshaft and connecting rods come forged from the factory. With forged internals and a robust cast iron block 2JZ-GTE engine is capable of outputs over 400hp with stock internals.
Toyota 2JZ engine specs
| Manufacturer | Tahara Plant |
| Also called | Toyota 2JZ |
| Production | 1991-2007 |
| Cylinder block alloy | Cast-iron |
| Configuration | Straight-6 |
| Valvetrain | DOHC 4 valves per cylinder |
| Piston stroke, mm (inch) | 86 (3.39) |
| Cylinder bore, mm (inch) | 86 (3.39) |
| Compression ratio | 8.5 10.5 11.3 |
| Displacement | 2997 cc (182.9 cu in) |
| Power output | 162 kW (220 HP) at 5,600 rpm 162 kW (220 HP) at 5,800 rpm 164 kW (223 HP) at 5,800 rpm 169 kW (230 HP) at 6,000 rpm 206 kW (280 HP) at 5,600 rpm 239 kW (325 HP) at 5,600 rpm |
| Torque output | ,294 Nm (216 lb·ft) at 3,600 rpm 280 Nm (206 lb·ft) at 4,800 rpm 280 Nm (206 lb·ft) at 4,800 rpm 304 Nm (224 lb·ft) at 4,000 rpm 435 Nm (321 lb·ft) at 4,000 rpm 440 Nm (324 lb·ft) at 4,800 rpm |
| Redline | 6,800 7,200 VVTi |
| HP per liter | 73.4 73.4 74.4 76.7 93.4 108.4 |
| Fuel type | Gasoline |
| Weight, kg (lbs) | 230 (507) |
| Fuel consumption, L/100 km (mpg) -City -Highway -Combined | for Supra Mk 4 18.0 (13) 10.0 (23) 12.5 (18) |
| Turbocharger | Naturally aspirated 2x Toyota CT20A 2x Toyota CT12B |
| Oil consumption , L/1000 km (qt. per miles) | up to 1.0 (1 qt. per 750 miles) |
| Recommended engine oil | 0W-30 5W-20 5W-30 10W-30 |
| Engine oil capacity, L (qt.) | 5.5 (5.8) |
| Oil change interval, km (miles) | 5,000-10,000 (3,000-6,000) |
| Normal engine operating temperature, °C (F) | ~90 (195) |
| Engine lifespan, km (miles) -Official information -Real | – 400,000+ (250,000) |
| Tuning, HP -Max HP -No life span loss | 1500+ 400-500 |
| The engine is installed in | Toyota Crown Toyota Mark II Toyota Supra Toyota Altezza RS300 Toyota Aristo Toyota Brevis Toyota Chaser Toyota Cresta Toyota Progres Toyota Soarer Lexus IS300 Lexus GS300 Lexus SC 300 |
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