JDM LEGENDARY ENGINES
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.
CT12B turbos with ceramic blades
440 cc/min fuel injectors
North American & European
CT20A turbos with stainless steel blades
550 cc/min fuel injectors
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.
Displacement (cc): 2997
Power Output (hp): 280 – 320
Compression Ratio: 8.5:1
Bore (mm): 86.0
Stroke (mm): 86.0
Years Produced: 1991 – 200