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Toyota 3S-GTE Engine

 

3S-GTE was Toyota's 2 litre inline 4 turbocharged performance engine mainly used to power most powerfull version of Toyota Celica and MR2 models between 1986 to 1999. 3S-GTE was also used on Toyota Caldina GT-4 and GT-T models between 1997 to 2002. 3S-GTE shared the same block cast iron block with its non-turbo sister 3S-GE. The only exceptions were turbocharger oil passages and piston oil coolers present on 3S-GTE. 86mm bore and 86 mm stroke swept a total displacement of 1998cc. The aluminum alloy head featured dual over head cams and 4 valves per cylinder that measured 33.5mm for intake and 29.0mm for exhaust. To increase combustion efficiency, cross flow intake and exhaust layout was coupled with pent-roof combustion chambers. Fuel injectors were placed on the side of the head as opposed to 3S-GE which had the injectors on its top. Toyota continued developing 3S-GTE through out its life span. Although there is no such official classification from Toyota, 3S-GTE engines are generally collected under four generations.

 

 

First Generation

 

First generation of 3S-GTE was released in late 1986 with Toyota Celica ST165. It was equipped with a top mounted air to air intercooler, and single entry CT26 turbocharger that generated 12psi of boost. Intake manifold was featuring Toyota variable induction system (T-VIS) which had dual intake runners per cylinder. This system was used to increase low end torque of the engine. The compression ratio was set at 8.5:1 and the valve lift was 7.15mm both for intake and exhaust cams. First generation 3S-GTE was delivering 182hp in JDM and European model and 190hp in US model.

 

Toyota 3S-GTE

 

Second Generation

 

Second generation 3S-GTE was first used in ST185 Celica's which were introduced in 1989. Single entry CT26 turbocharger was replaced with a twin entry version and the valve lift was increased to 8.2mm on both cams. Compression ratio was increased to 8.8:1. Second generation 3S-GTE was using a hydraulic belt tensioner instead of the spring type tensioner used in first generation. Second model to recieve the 3S-GTE was SW20 MR2 released in December 1989. The main difference between the engines used in these models was the location of air to air intercoolers. Celica had a top mounted intercooler whereas MR2 had front mounted intercoolers. US and European versions of second generation 3S-GTE were rated at 200hp. JDM version of second generation 3S-GTE was delivering 220hp through use of ceramic turbine instead of the steel one found in export models. In the end of 1991 Toyota has released a rally homologation version of Celica GT-4 known as Group A Rallye in Australia, RC in Japan and Carlos Sainz Limited Edition in Europe. The engine used in these models had a top mounted water to air intercooler and the output was rised to 230hp by increasing the maximum boost to 16psi.

 

Third Generation

 

Toyota introduced the third generation 3S-GTE in late 1993 with Series III Toyota MR2, just a few months before the launch of  Celica ST205 which also used the same engine. Third generation had some major enhancements compared to first two generations. The head was almost redesigned; intake ports were not featuring T-VIS any more and the exhaust ports were widened about 10mm. Third generation 3S-GTE was using CT20B turbocharger which was generating 18psi of boost. Bigger turbocharger needed more air and more fuel. Injector size was increased to 540cc from 430cc. Intake cam lift was raised to 8.7mm and throttle size was now 60mm opposed to 55mm found on previous versions. Map sensor was also revised to cope with the remaining changes. MR2 models were breathing through a front mounted air to air intercooler and making 245 hp where Celica models, equipped with top mounted water-to-air intercoolers, were making 255hp. In late 1997, block casting was revised with added support around the head to prevent block cracking problems

 

 

Fourth Generation

 

Fourth generation was the last and the most powerful generation of 3S-GTE. This engine was only used in Toyota Caldina ST215 and Caldina GT-T models (which is also known as Caldina ST256). Fourth generation was using a new intake manifold. Turbocharger turbine housing was integrated to exhaust manifold. Direct ignition system was used to increase combustion efficiency. Engine internals were also revised for better engine reliability. The final version was delivering 260hp. Production of 3S-GTE ended in 2002 along with Caldina GT-T

 

Model

3S-GTE

Displacement (cc)

1998

Power Output (hp)

182- 260

Compression Ratio

8.5:1 - 8.8:1

Bore (mm)

86.0

Stroke (mm)

 86.0

Years Produced

1986 - 2002

 

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