Eric Hsu has posted some relavent information about the 2.0T motor and the driveline of the Genesis Coupe. He recently spoke to Gary at Design Craft and picked up some very useful information to dispel the rumors around the car. Among the information – the coupe uses a gear type (helical) rear LSD, not a clutch type. He also mentions differences between the Mitsubishi 4B11 block and Hyundai’s Theta block. Remember, we made the mistake saying they were the same when in fact, they are not. Make sure to see the edits we made in our article here. To clarify, Hyundai designed the engine as a member of the World Engine Alliance. They then shared the design with other members Mitubishi and Chrysler, who modified the design to their applications. So while the designs are similar, they are not the same. Eric also points out the issue with the camshafts on our page here – that it is difficult to see if cams are identical just from photos. We agree, but we’re just posting what we see and read online. To see the rest of the information, including aftermarket turbo fittment, click here.

I have read here and there where people are claiming that the Mitsubishi and Hyundai versions of the 4B engines are nearly the same. So to clarify, here are some factual things I’ve learned from talking to Gary at Design Craft (who would probably be the leading Hyundai 4B11T expert at this point in time), Simon at Hyundai (who is a Hyundai test engineer and probably knows the most about the Genesis Coupe at this point in time), and Mo at Mitsubishi (who just knows a lot about both versions of the 4B11T and a certified car nut himself) about the Hyundai Genesis Coupe and it’s engines:

One of the employees at AMS Performance have purchased a Genesis Coupe. The official word from AMS, as sourced here from Genesis Owners is that fabrication and production of a full line of parts will be done for the car. In case you didn’t know, AMS has built one of the fastest Mitsubishi Lancer Evolutions in the world, and they intend to continue with the tradition with the new Lancer Evolution X. Since they have a very similar engine design, expect to see AMS Performance make big big power with the new Genesis Coupe!

This brings me to our latest project. Ivan one of our lead technicians is purchasing a Genesus coupe 2.0T. This year AMS will be working with the 2.0T and producing a full line of parts. We are confident in our ability to not only make power with the Genesis coupe but to make reliable and safe power. So in the coming months you can expect a lot more posts from Ivan, myself and our staff here at AMS as we strive to make the best products made for the Genesis coupe right here in the USA!

Vivid Racing and Cosworth over at genesisforums.org have supposedly confirmed that the Mitsubishi 4B11 and the Hyundai Theta engine used in the 2.0T share the same camshafts – this immediately opens up a whole new world of tuning options for the Theta 2.0T engine before it is even released in the US market! Click here to see the thread with the info, along with more pictures, or click “Read More” to just see the pictures.

With your pictures send to Korea, our engineer and tech dept. have confirmed its identical as 2.0 turbo Theta for those cams.

If you can’t believe, you can buy engine from me (posted other thread) to confirm yourself.

2.0 or 3.8 engine, tranny, harnesses, ecu to run engine dyno. 

Price seems to be very good for cams. I have their Cosworth pistons for Z and some extra spare parts with me…high comp, low comp, standard comp pistons, con rods, fuel rail but hard to sell due to high cost.

One of my buyer in Korea was Cosworth distributor, but they quit due to slow part delivery for carbon plenum for Z cars. There is no Subaru, no S2000, no Lan Evo in Korea except for some grey import cars, so Cosworth parts weren’t that popular or known.

With newer parts develop for Hyundai by Cosworth, I am sure they want to regain distributorship.

Sabbasaun 

**Admin** 

Seoulful Racing has been doing a lot of importing and prototyping for the new Genesis Coupe and they have focused on the 2.0t model for a lot of their work. One of their latest developments is their new BOV kits for the 2.0t motor. Since the Siemens VDO ECU-II manages the airflow with a MAP sensor, BOV’s can be added to the car without driveability issues. Those of you that enjoy the BOV sound can get it now without the stalling issues that plagued MAF based cars! More pictures after the break!

Finally got our first batch of piping kit+Blow off valve
It uses the same flange as HKS, so customers can have either our BOV or HKS bov on this piping. Piping is made in aluminum and polished.

Update 20090309: It seems we got some details wrong. Pointed out by JGP at the AutoBlog comments, and according to this article on Wikipedia, Hyundai was the company that did the initial design on the engine, who then provided the engine to Mitsubishi, who then modified the engine to their specs. Euclid at NASIOC also mentioned that the 4B11 is a Mitsubishi designation, and that the only thing these blocks share are a common base design. As stated before, Hyundai did the initial engine design, which they then shared with Mitsubishi. Mitsubishi then modified their design to work in their cars, it it should be that the new Evo X 4B11T and the Ralliart 4B11 are based on the Hyundai\Chrysler\Mitsubishi World Engine design. It is NOT a 4B11, it is simply related to the 4B11. Sorry, and thanks to those who tipped us!

Beyond Redline has taken apart the 2.0T motor used in the Genesis Coupe with some nice pictures. As expected, the block is sourced from the 4B11, the motor used in the new Lancer Ralliart (not to be confused with the 4B11T used in the Lancer Evolution X). [EDIT: Please read the update above, this engine, while related to the 4B11 is not the same block]. It looks like it has a beefy crank and stout rods  with a 86mm\86mm stroke and bore, making it a square motor which is great for high revving madness. Beyond Redline expects 400whp at around 8000 RPM an easy goal with supporting mods but an otherwise stock block. With  piston oil squirters it also looks like it will be very tunable to produce plenty of power. One disappointment is that it is an open deck block. High boost can possibly warp the cylinders into ovals, so for high power applications the block may need some reinforcement called block guards to reinforce the cylinder walls. The tradeoff is better engine cooling and the possibility to tune the engine more aggressively with less boost to make more power. Compare this to the 4B11T, which has a semi-closed deck with supports all around the cylinder. More pictures after the jump, or click here to see the thread on GenCoupe with all the details.

Hi guys. The insides of this motor look pretty promising. Other than the rods and pistons, the rest looks decently strong. I do have to sonic test the walls, and may go so far as to machine out a sleeve just to see what type and how thick of material was used. Either way being that it is a factory turbo motor, it has to be stronger than a honda block. In stock form I would expect that this wouuld hold around 400 whp, but only time will tell.

Its only a short drive, but Car and Driver has taken the 2.0T model out for a short drive. They like the feature list, and they compare the engine to the Mitsubishi 4B11. It also uses the Siemens VDO ECU-II for engine management, which is a fairly new and complex system.  Click here for the full review.

Hyundai knows 210 horsepower in a 3380-pound car won’t astound anyone. It imagines the base Genesis coupe with its 2.0-liter turbocharged four as a blank canvas for tuners and speed-widget makers chasing the young buyers who will be hooked by the turbo’s $22,750 starting price.