The 1JZ-GTE engine is a high-performance version used in sporty models. As you can see, the most common 1JZ version is a straight forward six-cylinder engine with a minimum of expensive and unreliable electronic components. 1JZ-GE VVT-i engines have a 10.5:1 compression ratio. After updating in 1995, they were equipped with DIS-3 distributorless ignition and variable valve timing technology VVT-i for the intake only. Later 1JZ-GE engines had an ignition system with distributor and 10:1 compression ratio. All 1JZs have a cast iron cylinder block, aluminum cylinder head with four valves per cylinder (24 valves total) and solid shimless buckets (no hydraulic lifters), double overhead camshafts driven by a toothed timing belt, and two-stage variable length intake manifold (Toyota's ACIS).
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