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Full Version: Tuneability of the 2.0 Gen Coupe motor
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namjanurse7
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). 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.

namjanurse7
Also from someone who works for AEM
working some new parts for the gen coupe

QUOTE
OK, I have finally been able to take the 2.0T car out for some extended driving. Over the last 24 hours I have put about 200 miles on it. Here are my impressions so far.

First. I love the car.

I love the interior. The blue lighting is really cool. I thought I had seen it all but this interior at night is just too cool for words.

The power delivery feels like a tractor. The small turbo hits *instantly* but very quickly runs out of steam making you want to grab the next gear despite being nowhere near the redline. As an example of this I tested some 1st to 3rd acceleration runs, going all the way to redline in each gear and it felt almost as fast as a normal 1st, 2nd, 3rd run because I was making 14 PSI boost while lugging in 3rd rather than 8psi revving in 2nd. I know 1-2-3 is faster but the 1-3 felt just as fast which should tell you something about the power delivery. This is also a damning indictment of "butt dynos" as we know the car makes more power the more you rev it out. It is faster if you rev it out but it feels faster if you short shift it. To solve this problem I propose we turn the boost way up at high RPM to make it feel fast there as well!

In 6th gear at 85 MPH it is turning almost 3000 RPM. I was almost grabbing for 7th.

We have our prototype intake on it and now the electronic blow off valve (recirc valve) is loud. really loud. It is also super aggressive, "wooshing" all over the place. It wooshes even when you are backing out of a parking spot. If you ever decrease the throttle position, it make a loud woosh. Some may love this, some may not.

The DBW is a bit weird. It appears that they have programmed it to hang after a high rev and decel slowly (probably to cool the cat) but it can be a bit disconcerting and I am looking forward to putting the EMS on the car and doing a straight 1:1 pedal to DBW controller on it (after removing the cat of course) and doing some lap time comparisons.

The car has so much potential that I cant even stand it. I am doing some baseline drivability work before I start raising the boost with the F/IC but I am getting impatient and want to turn the boost up and the blow off valve way down.
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