Help us out: The massive engine specs quest!

[Daffyflyer]

You do? awesome! In that case........

Probably too much for the initial release, but can I request that the theoretical "Advanced DLC Pack" include the ability to customise the diameter and length on intake / exhaust etc?

Maaaybe... length would be paticularly nice, but we'd have to work out a set of morph targets that let you change intake lengths but still has the throttle body line up in the same place in the end... could be done but might be hard

^And we already simulate the length of the intake and its impact on resonant tuning, so its quite possible to just swap intake lengths mid-power run. For now though, it'll add a bunch of extra art and such. but its a reasonable thing for us to add later, for sure

As far as realistic artistic depiction of the variable intake runners goes, the only thing you'd have to add is a little vacuum or electronic actuator and a lever off the side of the intake manifold. It's not really an obviously visible feature, and if you didn't know what you were looking for, you wouldn't even see it under the hood (I mean in real life).

Here's a very simple diagram of what it looks like on a 4 cylinder (cross section).
http://t1.gstatic.com/images?q=tbn:ANd9 ... 0xEpF3yXOA

And here's an example of a vacuum actuator on a bmw.
http://www.4dsc.com/articles/drivetrain ... ntake1.jpg

An electronic actuator would be much more compact, but it's still a pretty straightforward design.

[Daffyflyer]

Oh yes, variable intake is no issue - I was saying it'd be hard to have people choose the length of the runners in a fixed intake system

Oh yes, variable intake is no issue - I was saying it'd be hard to have people choose the length of the runners in a fixed intake system

Oh, I hadn't even thought of that. I guess the combination of fluid dynamics and resonant frequency makes the exact simulation of how intake runner length affects the power band a big headache; but would it be difficult to find a rough approximation? A sliding bar for long-to-short that has a slight benefit to the respective low-to-high rpm range? I know it'd take some research to accurately approximate that relationship, but then the question is whether or not that subtlety is worth the extra effort? Or would it offer a better insight to the variable intake benefits?

Personally, I'll probably be happy enough with the game whether you include that detail or not.

[Daffyflyer]

Nah, the physics is easy, its making the art that is the hard bit, its hard to make the intake grow and shrink without making the throttle body disconnect from the intake

You could make it staged/flap based (at least initially), so that it's just valving moving like the Peugeot ACAV system or the RX8's multiple intake shutters.
That way all you need to do is show some actuators/solenoid valves switching over and have the engine note alter slightly when it does?

Added the B18CR

I added a few Mercedes engines, the 2.3-16 Cosworth, the 3.6L AMG M104 and the 4.3L AMG M113.

Have put a few 1970's Triumph engines in the list.
Some more early 40's 50's to add and some Rover Engines from the
glorious days of British Leyland lol

Added two Chrysler I4 engines: 2.0L A558 SOHC and 2.0L ECC DOHC.