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Toyota GR engine
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The Toyota GR engine family is an open-deck, V6 piston engine series. The GR series has a 60° die-cast aluminum block and aluminum DOHC cylinder heads. This engine series also features 4 valves per cylinder, forged steel connecting rods, one-piece cast camshafts, and a cast aluminum lower intake manifold. Some variants use multi-port fuel injection, some have D-4 direct injection others have a combination of direct injection and multi-port fuel injection or D-4S.
The GR series replaces the previous MZ V6 and JZ I6 engines.
Note: power ratings have changed due to SAE measurement changes.
1GR-FE is the 4.0 L version.
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Encyclopedia
The Toyota GR engine family is an open-deck, V6 piston engine series. The GR series has a 60° die-cast aluminum block and aluminum DOHC cylinder heads. This engine series also features 4 valves per cylinder, forged steel connecting rods, one-piece cast camshafts, and a cast aluminum lower intake manifold. Some variants use multi-port fuel injection, some have D-4 direct injection others have a combination of direct injection and multi-port fuel injection or D-4S.
The GR series replaces the previous MZ V6 and JZ I6 engines.
Note: power ratings have changed due to SAE measurement changes.
1GR-FE
The 1GR-FE is the 4.0 L version. Bore is 94 mm and stroke is 95 mm. Output is at 5200 rpm with of torque at 4000 rpm on 87 octane, and at 5200 rpm with at 3700 rpm on 91 octane. This engine features Toyota's VVT-i, variable valve timing system on the intake cam and a compression ratio of 10.0:1. Inside, the 1GR uses a taper-squish combustion chamber design with matching pistons to improve anti-knocking and engine performance, while also improving intake and fuel efficiency. Toyota adopted a siamese-type intake port, which reduces the surface area of the port walls and prevents fuel from adhering to such walls. This engine has special cast-iron cylinder liners cast into the block, which are a spiny type to improve adhesion between the liner and cylinder block. With these special thin liners it is impossible to bore the block. In the event of cylinder wall damage (scoring, deep protrusions, etc), the entire cylinder block must be replaced. For increased block rigidity, the 1GR also receives a high temperature plastic insulator/protector, which fills the empty space between the outer portion of the cylinders and block material common to open deck engines. For increased cooling efficiency, the 1GR employs water passages between the bores of the engine. There are such two passages for each bank for a total of four. This reduces cylinder hot-spotting and keeps combustion chamber temperatures more uniform.
Applications:
2GR-FE
The 2GR-FE is a 3.5 L (3456 cc) version. Bore remains at 94 mm but stroke is reduced to 83 mm. Reported output varies depending on the vehicle application, but is approximately at 6200 rpm with of torque at 4700 rpm on 87 octane (R+M/2). This version features Toyota's Dual VVT-i, variable valve timing on both the intake and exhaust cams. Valves are driven by roller-follower rocker arms with low friction roller bearings, and a unique, concave cam lobe design to increase valve lift over the traditional shimless lifter type system of the 1GR-FE. This increases overall cylinder head height to accommodate the slightly taller roller rocker system. Moreover, the cylinder head is segmented into 3 parts: valve cover, camshaft sub-assembly housing, and cylinder head sub-assembly. As such, this valvetrain is used across all other GR engines with Dual VVT-i.
Applications:
2GR-FSE
The 2GR-FSE engine used in the Lexus IS 350 incorporates Toyota's latest D-4S twin injection fuel system. This system combines direct injection with traditional port injection. Using direct injection and port injection simultaneously facilitates more precise mixing of air and fuel under low and medium load conditions for greater efficiency, while high load conditions dictate the use of direct injection alone for maximum power. The 2GR-FSE engine is rated at at 6,400 RPM and at 4,800 RPM.
The 2GR-FSE was on the Ward's 10 Best Engines list for 2006, 2007, 2008 and 2009.
Applications:
3GR-FE
The 3GR-FE is a 3.0 L (2994 cc) version with Dual VVT-i. Bore is 87.5 mm while stroke is shared with the 2GR at 83 mm, with a compression ratio of 10.5:1. Output is at 6,400 RPM, and at 4,800 RPM.
Applications:
3GR-FSE
The 3GR-FSE adds gasoline direct injection, referred to by Toyota as D-4. The 3GR-FSE engine is rated at at 6,200 RPM and at 3,600 RPM.
Applications:
4GR-FSE
The 4GR-FSE is a 2.5 L (2499 cc) version. Bore is 83.1 mm while stroke is reduced to 76.9 mm. Output is at 6,400 RPM and at 3,800 RPM. This version also features Dual VVT-i", variable valve timing on both the intake and exhaust cams and an improved D4-S gasoline direct injection system.
Applications:
5GR-FE
The 5GR-FE is a 2.5 L (2497 cc) version. Bore is 87.5 mm while stroke is 69.2 mm with a compression ratio of 10.0:1. Output is at 6,200 RPM and at 4,400 RPM. This version does not include direct injection D-4, but does include Dual VVT-i.
Applications:
See also
List of Toyota engines
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