The 4A-GZE (produced in various forms from August 1986 through 1995) was a supercharged version of the 4A-GE. Based on the same block and cylinder head, the 4A-GZE engine was equipped with a Roots type supercharger producing 8 psi (0.55 bar) peak manifold pressure, and the compression ratio was lowered to 8:1 with the use of forged and dished pistons. Although fitted with upgraded pistons, they still had the same ports, valve timing, and head gasket as the naturally aspirated 4A-GE engine, although T-VIS was omitted. It was used in the supercharged MR2, rated at 145 PS (107 kW; 143 bhp) at 6400 rpm and 19.4 kg⋅m (190 N⋅m; 140 lbf⋅ft) at 4400. In 1990 it was updated with the "smallport" cylinder head, 8.9:1 compression, and MAP D-Jetronic load sensing and a smaller supercharger pulley producing 10 psi (0.69 bar). These updated 4A-GZE engines were rated at 121 kW (163 hp; 165 PS) and 21.4 kg⋅m (210 N⋅m; 155 lbf⋅ft) for the 1990/1991 AE92 Corolla and 173 PS (127 kW) for the AE101. The 4A-GZE is also popular for turbo conversions, as many parts do not need to be modified to support the extra boost.[23] Applications: AE92 Corolla 1987–1991 (Japan only) AE101 Corolla 1991–1995 (Japan only) AW11 MR2 1986–1989 (Japan, 1988-1989 North America) AE92 Sprinter 1987–1991 (Japan only) AE101 Sprinter 1991–1995 (Japan only)
Racing Applications
Due to its durability, performance and relatively low cost, 4A-GE and 4A-GZE engines and their derivatives have been popular for both professional and amateur racing since their introduction. The most notable application of the 4A-GE in racing was as in the Formula Atlantic series, where in full race trim the engine will produce 179 kW (240 hp; 243 PS) at 10,000 rpm.
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