Peak power and torque figures of 206 kW and 422 N·m are for Japanese market Lancer Evolution models[5] and figures of 217 kW and 407 N·m are for US market models.[6]
The 4B11T is the first engine in the Lancer Evolution series that uses a die-cast aluminium cylinder block versus the cast-iron block used in the previous turbocharged 4G63 engine that powered all previous models. The engine weight has been reduced by 12 kg (26 lb) compared to the 4G63, even with the addition of a timing chain instead of a belt and MIVEC continuous variable valve timing on both the intake and exhaust camshafts (the 4G63 had MIVEC valve timing & lift switching type on the intake only). A revised turbocharger offers up to 20-percent quicker response at lower engine speeds compared to previous 4G63. The 4B11T offers a broader torque curve, producing more torque than the 4G63 at all engine speeds, helped by the engine's square bore and stroke design (both measure 86.0 mm). Redline starts at 7,000 rpm, with a fuel cutout at 7,600 rpm to protect the engine.[6]
A semi-closed deck structure, an integrated ladder frame and four-bolt main bearing caps contribute to engine strength, durability and lower NVH levels. Unlike the 4G63, the 4B11T does not use a balancer shaft. The semi-floating pistons of the 4G63 have been replaced with a fully floating pistons for the 4B11T. Aluminium is also used for the timing chain case and cylinder head cover. The engine features an electronically controlled throttle, an isometric short port aluminium intake manifold and the stainless steel exhaust manifold is positioned at the rear of the engine. The use of a direct-acting valvetrain eliminates the need of the roller rocker arm configuration previously used in the 4G63. The 4B11T features built-up hollow camshafts and its valve stem seals are integrated with the spring seats. The internal components of the 4B11T engine have been reinforced to withstand high levels of boost.[6]
Posted: Mon Apr 20, 2009 7:50 pm
by dirtygalant
The Theta II engine in the Genesis is NOT a 4B11, while they share many characteristics they are not the same. The GEMA World Engine which the 4B11 is part of was based originally off the Hyundai Theta II.
The 4B11 wasn't built with longitudinal orientation in mind so I very much doubt it will share the same mounting points as the Thema II also.
Posted: Tue Apr 21, 2009 3:34 am
by www.18u
DG is correct it is a Hyundai Theta engine, that shares the same block as the 4b11. The the motor was designed in conjunction with Mitsubishi, Chrysler and Hyundai. Rods seem to be stronger than the evo, but uses a 2 bolt main instead of a 4 bolt setup. The engine would be more related to the ralliart lancer than the evo. Guys are already running 4b11 head studs and cams in there Genesis coupes so as far as i am concerned its good enough to a 4b11 for me.
I think this may be a viable engine swap for the starion in the next few years.
Posted: Tue Apr 21, 2009 10:14 am
by thrash
if the block is the same, can the 2 bolt mains be thrown out and swapped with the 4b11's?
Posted: Tue Apr 21, 2009 10:36 am
by dirtygalant
dude the bolts go into the block...
this is 4B11 block with AMS main studs installed:
and Hyundai Theta II engine:
Posted: Tue Apr 21, 2009 10:37 am
by thrash
LOL
shows you how little i know about these things
i was thinking about the bolts that attach to the flywheel
so.. the block isn't exactly the same, just shares some of the basic design then eh?
Posted: Tue Apr 21, 2009 10:45 am
by dirtygalant
yeah as I said above, the 4B11 (or any GEMA world engine) is NOT the same as the Theta II engine - the 4B11 is merely BASED on the Theta II and has somewhat changed in further development.
A good video showing features of the 4B11 engine here -
Posted: Tue Apr 21, 2009 6:08 pm
by Chris 83JA
Good to see some manufacturers going back to the RWD platform.
Weight distribution seems only average at 55:45.. Maybe best to scrounge around for another $10k and go for an RX-8, MX-5 or a 125i from some real 50:50 RWD fun!
Posted: Sat Apr 25, 2009 12:12 pm
by enthuzed
Stunned that they've gone with a timing chain... :o
Posted: Sun Apr 26, 2009 7:12 pm
by hoongirl
"If you buy a Hyundai, invitations will dry up, your kids will refuse to speak to you, your wife will sleep with your friends and you may end up committing suicide." - Jeremy Clarkson
rofl
Posted: Sun Apr 26, 2009 7:36 pm
by bridgey
rhys millen racing has bulit 2, one for time trial racing and now since their GM contract has run out one for drift
Posted: Sun Apr 26, 2009 7:46 pm
by thrash
well.. way back when, people thought that way about jap cars.. look where they are now..
