Toyota Car Parts - A Series Engines

The plus side of this design is that it improved fuel efficiency and torque, the down side is that it compromises power Also, the 4A-FE had extra power 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 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 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 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. Toyota designed this engine with fuel economy in mind 5 L. 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 The series began in the late 1970s with the 1A, an SOHC engine with a displacement of 1. The 1·5 L (1452 cc) 3A was produced from 1979 through 1988 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 Toyota models that had this engine:
Corolla AE85 (JDM)
Carina AA60The 4A was produced from 1980 through 1998 The next major modification was the high-performance 4A-G, with the fuel injected version, the 4A-GE, being the most powerful This engine has the silver cam covers with the words only written in red, hence the nickname 'red top' Toyota increased the compression ratios from 9·4:1 to 10·3:1 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. 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 Additional engine modifications to extend life and the reliability included under piston cooling oil squirters, thicker connecting rods and other components The third-generation appeared in 1989 and was in production until 1991 It was a 2-valve SOHC design like its predecessor. 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 Also of note the pistons were changed to accept a 20mm fully floating gudgen pin unlike the 18mm pressed in pins of the earlier versions The engine was succeeded by the 3ZZ-FE, a 1·6-liter engine with VVT-i technology 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 New performance parts are still available for sale even today because of its strong fan base 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 Production of the first-generation engine model lasted through 1987 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 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 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 All non-US market 4A-GEs continued to use a MAP sensor, while all of the US-market Toyota 4A-GE came with a MAF sensor Numerous variations of the basic 4A design were produced, from SOHC 2-valve all the way to DOHC 5-valve versions. 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. Although not as powerful as the 4A-GE, both engines are renowned for the power they produce from such a low displacement (relative to other engines). This engine used a modified 16-valve head and produced approximately 240 horsepower at 8400 rpm It is speculated that the 4A-GE is actually a road-going version of the Ford Cosworth BDA racing engine, reverse engineered by Toyota as the bore and stroke dimensions are similar and there are many similarities in the engine design, making it a reliable engine for motorsports applications. This raised the airspeed which caused better cylender filling and also better fuel atomisation It was extremely light and strong for a production engine using an all-iron block, and produced 112 hp (84 kW) at 6600 rpm and 97 ft·lbf (131N·m) of torque at 4800 rpm in the American market. The series has cast iron engine blocks and aluminum cylinder heads. It is visually similar to the first-generation engine and the power output is unchanged, but the upper cam cover now featured red and black lettering 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 Cylinder bore was 77·5 mm (3·05 in) and stroke was 77 mm (3·03 in). All 4A engines have a displacement of 1·6 L (1587 cc). Toyota designed the engine for performance; the valve angle was a relatively wide 50 degrees, which at the time was believed to be ideal for high power production. The first generation 4AGE is nicknamed the 'bigport' engine because it had inlet ports of a very large cross sectional area. The first-generation 4A-GE which was introduced in 1983 replaced the 2T-G in most applications. Cylinder bore was 76 mm (2·99 in) and stroke was 71·4 mm (2·81 in). It was a 2-valve SOHC engine. 3° apart (compared to 50° in the G-Engines).
Other models equipped with the 4A-GE:
Chevrolet Nova (based on Toyota AE82 chassis; 1984–1988—these 4A-GE cars were exceptionally rare)
Geo Prizm GSi (based on Toyota AE92 chassis; 1990–1992) The only exception was the US-market 1990-91 Geo Prizm GSi, which was equipped with the MAP Power rating varies during certain generations that had the engine. 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 second generation engine was produced from 1992 until 1998. There were California-spec (3A-C), Japan-spec (3A-U), transverse (3A-L), and swirl-intake (3A-S) versions of the same basic design. The TVIS feature is maintained. The engine was used in the Toyota Corolla Sedan from 1988 to 1998 and in the 5th Generation Celica ST models from 1989 to 1993 both in North America and Europe, as well as the Camry from '87 to '91. Toyota joint venture partner Tianjin FAW Xiali still produces 1·3 L 8A and recently restarted production of the 5A.

Visit Toyrolla's Toyota Car Parts