Mitsubishi Evo 8 (4G63T)

[OiledTinman]

Just wanted to try and make an engine that is as close to something I have worked on and played with in real life. I am writing all of the setup down with comments for some that I had issues with in hopes that someone on here may know a solution to it, so its also a nice learning experience.

The engine is the one I have in one of my cars, the Mitsubishi Lancer Evolution 8 MR, its game name would be 2.0L 16V DOHC Turbo

I got most of the specs down though I had some issues with the turbo (could not get the exact size)

Bottom End
Engine Block: Inline 4
Block Material: Cast Iron
Bore: 85.0 mm
Stroke: 88.0 mm
Crank: Forged Steel
Conrods: Forged H Beam (I assume this is also Forged Steel even though the game does not say so)
Pistons: Forged (Description says its a chunk of aluminium so it seems right)

Top End
Head and Valves: DOHC 4
Head Material: Aluminium
Compression: 7.5:1
Cam Profile: 51 (Here was my first actual problem as I could not really find out what the number in the game represent "51 what exactly?" so I just took a guess and tried to make the final results look similar to the real engine)
VVT: VVT - All Cams (Though "VVT - Intake" did not seem to have any major change)
VVL: None (This can technically be "VVL" if you would want to re-create a later version of the engine, in my case it has yet to be implemented)

Aspiration
Type: Turbo
Setup: Single Turbo
Options: Ball Bearning
Intercooler: Air-Air Large (Bit difficult to tell, but the visual looks right, since it is HUGE!)
Compressor: 67.9 mm (Here was my first slight problem, the exact compressor size should be 68.0 mm but the game will not let me choose anything larger then 67.9 mm even though the slider is about half way up, and I know I can get turbos as large as 105.0 mm fitted to it)
Turbine: 56.1 mm (Again a little problem since the exact size is 56.0 mm yeah not much of a difference but it always seemed to skip the exact number )
AR Ratio: 0.70 (Here was a bigish hurdle since this ratio makes no sense to me, the only AR ratio I know of for this turbo is 10.5cm^2 so none of the ratios made sense to me, maybe someone else know though, so I just picked a number out of the sky and put it in there)
Max Boost: 1.20 Bar (This can vary a whole lot heck I change it all the time depending on what I "need" it can easily do 1.50+ Bar, though it may explode at any higher)

Fuel System
Fuel System: Injection, Multi Point EFI
Fuel System Config: Single
Intake: Performance
Fuel Type: Premium Unleaded
Fuel Mixture: 11.4:1
Ignition Timing: 53 (Again, not sure what the game number really represents, its just a number of something, could be 53 Apples for all I know )
RPM Limit: 7000 RPM

Exhaust
Headers: Short Cast (no choice here really due to turbo)
Exhausts: Single
Muffler Bypass: No Valve
Exhaust Diameter: 2.5" (this could also be 2.75" and 3.0" really)
Catalytic Converter: High Flow Three-way (I know its a High Flow of some sort so I would guess this is correct)
First Muffler: Straight Through (Looks and sounds like it)
Second Muffler: None (I am pretty sure it would be None on this one since the muffler sits quite far from the tip)

Puh, that was quite a bit of text, now down to the end results of it all, I feel like I was quite close with most of it except for when MAX Torque happens, I could not figure out how to "move" it without messing up too much of the engine setup, though the numbers were all fairly close.

To the left is the IRL engine numbers, to the right is my in game engine numbers.
Power: 271 hp (202 kW) at 6500 rpm | 277 hp (206 kW) at 6400 rpm
Torque: 370 Nm (273 lbft) at 3500 rpm | 369 Nm (272 lbft) at 4400 rpm (And this is the biggest difference with it, I could not figure out how to reduce the rpm without messing up too much of the other numbers, maybe someone else know how?)

And since I am so kind, below is the engine file if someone would want to play around with it, I know you can get a lot more out of the engine by just tuning the numbers a little bit, though my attempt was to get it as close to the real deal as possible.

[Juno8]

Do you want a video on this engine?

[OiledTinman]

Do you want a video on this engine?

Sure.
Would the video contain any help on some of the topics I brought up, like my issues with some of the numbers and the RPM issue?

[Juno8]

I mean I will look into the engine to see if I can get it right then I will do a video on it but I have like 11 videos to do on 11 different engines but this is now engine 12 on my list to do

[OiledTinman]

I mean I will look into the engine to see if I can get it right then I will do a video on it but I have like 11 videos to do on 11 different engines but this is now engine 12 on my list to do

Sounds cool!

[Juno8]

yeah but 11 videos...my throat is going to kill me and its all F1 engines from the past I MADE! aaaaarrrrrrgh!

[oldgreg]

AR Ratio: 0.70 (Here was a bigish hurdle since this ratio makes no sense to me, the only AR ratio I know of for this turbo is 10.5cm^2 so none of the ratios made sense to me, maybe someone else know though, so I just picked a number out of the sky and put it in there)

10.5cm^2 isn't the A/R, it's the nozzle area. A/R is the area of any cross-section the turbine inlet divided by distance from the center of that section to the centerline of the turbine wheel. They are two different things, though they serve a similar purpose. AFAIK there's no direct mathematical relationship between the two.

[OiledTinman]

10.5cm^2 isn't the A/R, it's the nozzle area. A/R is the area of any cross-section the turbine inlet divided by distance from the center of that section to the centerline of the turbine wheel. They are two different things, though they serve a similar purpose. AFAIK there's no direct mathematical relationship between the two.

With that information though I may be able to find some information somewhere, its a very popular car so I am sure its written down somewhere.

Would you have any idea what the Cam Profile and Ignition Timing numbers actually mean, are they a size, duration, angle or is it just a number you would not use in a real world situation or find in a manual or technical description of the part? It is really throwing me of because I do not know what to look for to find the actual number to input.

[oldgreg]

Would you have any idea what the Cam Profile and Ignition Timing numbers actually mean, are they a size, duration, angle or is it just a number you would not use in a real world situation or find in a manual or technical description of the part? It is really throwing me of because I do not know what to look for to find the actual number to input.

They're combinations/abstractions of multiple things. Ignition Timing would presumably cover not just spark advance but spark plug "temperature" and gap, and Cam profile, for instance, would include Lift, Duration, Cam timing and Overlap as well as the actual shape of the cam lobes. They're all combined like that because, for the most part, you'd want more or less of all of them rather than more of some and less of others. And because this isn't an engine simulator, but an engine parameterization that will be a part of a larger game and as such it needs to have a certain level of simplicity.

Don't worry about the numbers, they aren't really comparable to any real world figures. Experiment and see which get you closest in terms of the desired output. And don't be surprised if your results aren't a perfect match to reality as, again, it's not a simulation and it was never meant to be.