Toyota Car Parts - A Series Engines

In between, many interesting variations were produced, including one of the first 5-valve engines (the 4A) and the 170 hp (127 kW) supercharged 4A-GZE Numerous variations of the basic 4A design were produced, from SOHC 2-valve all the way to DOHC 5-valve versions Only the AE86 version carried the 4A-GE engine and GT-S designations in the US In other markets, other designations were used The A Series engines are a family of straight-4 internal combustion engines with displacement from 1·3 L to 1·8 L produced by Toyota Motor Corporation. Torque was less spread from 75 ft·lbf (101 N·m) at 2800 rpm to 89 ft·lbf (120 N·m) at 4000 rpm The engine was retired from North American Corollas in 1991, although it continued to be available in the Geo Prizm GSi (sold through Chevrolet dealerships) from 1990 to 1992 The second is that it employed a 'slave cam system', the camshafts being geared together and driven off one camshaft's sprocket (both camshafts' sprockets on the G-Engine are rotated by the timing belt) Toyota engineers had skillfully optimized the power and torque from the company's relatively low-displacement engines This raised the airspeed which caused better cylender filling and also better fuel atomisation The next major modification was the high-performance 4A-G, with the fuel injected version, the 4A-GE, being the most powerful Clarification: In the US market, the 4A-GE engine was first used in the 1985 model year Corolla GT-S only, which is identified as an 'AE88' in the VIN but uses the AE86 chassis code on the firewall as the AE88 is a 'sub' version of the AE86 Production of the various models of this version lasted for five generations, from 1983 through 1991 for 16-valve versions and the 5-valve 4A-GE lasted through 1998 The 1·3 L (1295 cc) 2A was produced from 1979 through 1986. During rising engine speed, a slight lurch can occur at the crossover point and an experienced driver will be able to detect the shift in performance This version, although from the same series and the same generation as the 4A-GE, is different from its 'brother' in terms of performance and power 3° apart (compared to 50° in the G-Engines) The 4A-GE was first introduced in the 1983 Sprinter Trueno AE86 and the Corolla Levin AE86 sports version The second generation engine was produced from 1992 until 1998 The 1987–1998 4A-FE is the descendant of the carbureted 4A-F. The difference between the two generations of this engine can be identified by the external shape of the engine, the first generation (1987–1993) have a more rugged look, a plate on the head which read '16valve EFI', and the fuel injectors in the head The 4A-FE is basically the same as the 4A-F (introduced in the previous generation of Corollas), the most apparent difference being the fuel delivery system The plus side of this design is that it improved fuel efficiency and torque, the down side is that it compromises power The 4A-F used a carburetor, while the 4A-FE used electronic fuel injection system (notice the 'E') Toyota models that had this engine:
Corolla AE85 (JDM)
Carina AA60The 4A was produced from 1980 through 1998. It was a 2-valve SOHC design like its predecessor. The 4A-GE engines for the 1985 model year are referred to as 'blue top' as opposed to the later 'red top' engines, because the paint color on the valve covers is different, to show the different engine revision, using different port sizes, different airflow metering, and other minor differences on the engine It was a 2-valve SOHC engine. The third-generation appeared in 1989 and was in production until 1991 Cylinder bore was 76 mm (2·99 in) and stroke was 71·4 mm (2·81 in). To compansate for the reduced air speed the first-generation engines included the TVIS feature, in which dual intake runners are fitted with butterfly valves that opened at approximetly 4200 RPM This engine has the silver cam covers with the words only written in red, hence the nickname 'red top' Toyota designed this engine with fuel economy in mind. The TVIS feature is maintained The AE86 marked the end of the 4A-GE as a rear wheel drive (RWD or FR) mounted engine, alongside the RWD AE86/AE85 coupes a front wheel drive (FWD or FF) corolla (the AE82) was produced and future Corollas/Sprinters were all based around the FF layout Toyota joint venture partner Tianjin FAW Xiali still produces 1·3 L 8A and recently restarted production of the 5A. 5 L. The series has cast iron engine blocks and aluminum cylinder heads. Toyota increased the compression ratios from 9·4:1 to 10·3:1 Production of the first-generation engine model lasted through 1987 This change in the intlet ports negated the need to have the need for the earlier twin runner manifold and was replaced with a single runner manifold This engine was identifiable via silver cam covers with the lettering on the upper cover painted black and blue, as well as the presence of three reinforcement ribs on the back side of the block. This enabled the the torque curve to still be intact at lower engine speeds, allowing for better performance across the entire speed band and a broad, flat torque curve around the crossover point. Some of the less directly visible differences were poorly shaped ports in the earlier versions, a slow burning combustion chamber with heavily shrouded valves, less aggressive camshaft profiles, ports of a small cross sectional area, a very restrictive intake manifold with long runners joined to a small displacement plenum and other changes. While the port cross section was suitable for a very highly modified engine at very high revs it caused a considerable drop in low down torque due to the decreased air speeds at those revs. The second-generation 4A-GE produced from 1987 to 1989 featured larger diameter bearings for the con-rod big ends (42mm) and added four additional reinforcement ribs on the back of the engine block, for a total of seven. New performance parts are still available for sale even today because of its strong fan base. To correct the air-speed problems of the earlier genrations of engine the heads inlet ports were redesigned to have smaller cross section inlet ports, and hence has been nickanmed as the 'smallport head' The engine was succeeded by the 3ZZ-FE, a 1·6-liter engine with VVT-i technology. The series began in the late 1970s with the 1A, an SOHC engine with a displacement of 1. Power was also extremely varied, from 70 hp (52 kW) at 4800 rpm in the basic California-spec 4A-C to 170 hp (127 kW) at 6400 rpm in the supercharged 4A-GZE. The effect was that at lower revs where the airspeed would normally be slow, four of the eight runners were closed, this forced all the engine to draw in all its air through half the runners in the manifold. The first obvious difference are the valves, the engine's intake and exhaust valves were placed 22. This engine used a modified 16-valve head and produced approximately 240 horsepower at 8400 rpm The only exception was the US-market 1990-91 Geo Prizm GSi, which was equipped with the MAP. The 1·5 L (1452 cc) 1A was produced in 1978 and 1979. Even though the valve angle is closer to what is considered in some racing circles to be ideal for power (approximately 25 degrees), its other design differences and the intake which is tuned for a primary harmonic resonance at low revs means that it has about 20% less power compared to the 4A-GE. The first generation 4AGE is nicknamed the 'bigport' engine because it had inlet ports of a very large cross sectional area.

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