Some questions

[nialloftara]

You're giving your economy which is like the thermal efficiency of the engine, that's more in line with, though not directly related to, mpg or L/100km. the stat you want is emissions which is the one above it.

[07CobaltGirl]

Emissions? Or economy? Emissions is just a number in the game (for now at least). Really good emissions could be less than 100 for something really modern, and not applicable for really old (pre-unleaded fuels and catalytic converters). As stated, it does not seem to correlate to any real world number per se. In the real world, they get lower each year, and it is presumable this will be true in game for production street cars. Prototype cars which will not see the road can be anything. The economy of an engine is measured percentages. Generally speaking, it means nothing other than general efficiency of the motor on the dyno. It doesn't have any usable real world numbers (read "common") associated with it until it is put into a car. It will then give you a mileage (liter/100 km, miles per gallon) which can relate to a marketable number for sales.

[nialloftara]

Emissions will have a huge range depending on the year the engine is made in, anything on leaded fuel isn't even counted. With my company I set my limits at 3000 in 72, 1300 with manadatory converters in 74, 900 in 83, 700 in 87, 600 in 91, 400 in 97 and 200 in 01 for production engines. these vaguely line up with the dates for the energy crisis, the advent of the catalytic converter, the American CARB standards, and various federal regs and laws for clean air and auto emissions, again that's in the US and only arbitrary numbers I picked for each. top 4 reductions are three way catalytic converters, fuel injection type (mpfi or DI), pistons type (hyperpneumatic or low friction) and then block and head material, aluminum is better then iron. hope that helps.

[KielEire]

Err yes I meant Economy.
Thanks for the Emissions Info. That helped out alot too!

I uploaded quite a few motors in the Motor Sharing forum. If you dont mind, check them out and let me know how I am doing so far.

[Drake]

I posted about how the emissions figures are poorly balanced a while back, and the response is relevent to your questions.

Currently they are pretty poorly balanced IMO.

Yes they are! We haven't looked into them for more than a year because that statistic is to tightly linked to the tycoon part that it makes little sense to invest lots of time into it now on rebalancing, only to find out that it has to be done differently later anyway. Your concerns are valid and the current emissions game mechanics broken. While we probably will not add any features to the engine designer, the dependencies and progressions regarding emissions will be reworked significantly. It won't be as trivial as "Cat! Now I'm fine".

So I wouldn't worry about those figures for now.. Sounds like it'll be a good system. I can't wait for the challenge of the 70's malaise era.