While the full tycoon mode is not ready yet, just wonder what engine/car ratio would be reasonable for the final game and IRL. Conseding customers may need to replace engine in some case, it might not be 1:1, maybe something like 1.x:1? or even goes to 2:1 or even more?
We haven't considered adding "spare parts" because it seems to be a tedious and cluttering game mechanic. We want the player to focus on more relevant and fun aspects of the game instead. So just assume with the production of cars and engines you make an appropriate amount of spare parts too.
So as for the game, 1:1 is enough? I've heard there would be a "engine market" for final game for me to buy stock engine, would I be able to sell my extra engine there as well? Or even be a professional engine maker without building a single car.
Yes, you would be able to sell additional engines on the engine market if someone wants them. You probably could play the game as an engine maker, or at least that is our plan to allow you to do that.