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The Toyota UR engine family is a 32-valve dual overhead camshaft V8 piston engine series which was first introduced in 2006, as the UZ series it replaced began phasing out. Production started with the 1UR-FSE engine with D-4S direct injection for the 2007 Lexus LS .
Toyota Racing Development offered a bolt-on supercharger kit for the 2000–2003 Tundra/Sequoia and the 1998–2003 LX 470. Another 2UZ-FE variation adds VVT-i, electronic throttle control, and a plastic intake manifold. Applications (calendar years): [7] 2004–2009 Lexus GX 470; 2005–2007 Lexus LX 470; 2005–2009 Toyota 4Runner
Valvematic variable lift intake head B: Before 2000 indicates twin SU-style side-draft carburetors After 2000 indicates E85 Ethanol fuel. [citation needed] C: Carbureted/California Emissions Controlled D: Twin downdraft carburetors or Toyota engines manufactured by Daihatsu without VVT-i (e.g., 1KR-DE) E: Multi-point fuel injection: F: Normal ...
SOHC design (for a 1973 Triumph Dolomite Sprint) . The oldest configuration of overhead camshaft engine is the single overhead camshaft (SOHC) design. [1] A SOHC engine has one camshaft per bank of cylinders, therefore a straight engine has a total of one camshaft and a V engine or flat engine has a total of two camshafts (one for each cylinder bank).
It also features higher flowing cylinder heads sourced from the L92, a more aggressive camshaft with 0.551 in (14 mm) lift, a 10.7:1 compression ratio, a revised valvetrain with 0.236 in (6 mm) offset intake rocker arms, a high-flow intake manifold, and 47 lb (21 kg)/hour fuel injectors from the LS7 engine.
The intake charge was cooled by a water-to-air intercooler and the intake manifold design is Toyota's T-VIS. It has 8 independent ports and benefits from the inertia build up to improve engine torque at low and medium speeds by closing 4 ports below a certain RPM and throttle position to increase air speed and maximize fuel atomization and ...
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