Engine Mitsubishi 4B11T

The Mitsubishi 4B11T 2.0-liter turbo engine was produced by the concern from 2007 to 2016 and was installed on such charged models as the Lancer Ralliart and a bunch of Evolution X modifications. There are nine different versions of this power unit with varying degrees of forcing.

The 4B11T is the first engine for the Lancer Evolution to use a cast aluminum cylinder block rather than the cast iron block used in the previous 4G63T engine. Engine weight has been reduced by 12 kg compared to its predecessor, even with the addition of a timing chain instead of a belt.

The basis of the design of the units of this family is identical: distributed fuel injection, an aluminum block with cast-iron sleeves, a 16-valve DOHC cylinder head without hydraulic lifters, a timing chain drive and a MIVEC variable valve timing system on two camshafts. But the supercharged engine is distinguished by a semi-closed block instead of an open cooling jacket, the presence of oil nozzles, as well as reinforced fastening of the crankshaft bearing caps. Naturally, these units are equipped with an MHI TD04HL or TD05H turbine, depending on the version.

Aluminum is also used for the timing chain housing and cylinder head cover. The 4B11T engine features an electronically controlled throttle, isometric short bore aluminum intake manifold, and a stainless steel outlet manifold located at the rear of the engine.

These turbo engines were very popular in the UK, there were as many as 5 of their versions:

• Evo X GB Edition FQ-300 – 300 HP, 409 Nm
• Evo X GB Edition FQ-330 – 329 HP, 437 Nm
• Evo X GB Edition FQ-360 – 359 HP, 492 Nm
• Evo X GB Edition FQ-400 – 409 HP, 525 Nm
• Evo X GB Edition FQ-440 – 446 HP, 559 Nm

4B1 family: 4B10, 4B11, 4B11T, 4B12.

Specifications

The engine was installed on:

• Mitsubishi Lancer 10 (CY) in 2007 – 2015;
• Mitsubishi Lancer Evolution X (CZ) in 2007 – 2016.

In total, there are 9 different modifications that were installed on the Lancer Ralliart and Evolution X:

• Mitsubishi Lancer Ralliart – 240 HP, 353 Nm
• Evolution X JDM Edition – 280 HP, 422 Nm
• Evolution X USA Edition – 295 HP, 407 Nm
• Evolution X EU Edition – 295 HP, 366 Nm

Disadvantages of the Mitsubishi 4B11T engine

• The most famous problem with this engine is the falling apart piston rings, the fragments of which scratch the cylinder walls, sometimes even bending the electrodes of the candles. Then the particles of these rings are sent to the exhaust and often disable the turbine.
• On the atmospheric version of this unit, the chain serves from 150 to 300 thousand km without problems, however, in a turbo engine, its resource is less and replacement on a run of up to 50 thousand km is not uncommon. Quite often, phase regulators also have to be changed, which are very expensive here.
• You also need to keep the oil coolers clean, this motor does not tolerate overheating, and regularly update the plastic rollers of the drive belt or it will jump off. Weak points include the fuel pump and the often cracked exhaust manifold.

Frequently asked questions about the Mitsubishi 4B11T