Engine-Family and Valvesize

General Chat Developer Questions
1

Hi

First i have to say that my english isn’t good. so sorry for the failures :slight_smile:

I have a question about the calculations of the valve, valvesize, valvefloat.

Prolog:
when i played around with my engines, i have learned that the boresize take influence to the valvefloat (if we take the same valvetype for example). for me it means that a biger bore goes with biger valves, biger valves don’t like to move very quick and so i got valvefloat very easely.

Something wrong(?):
once i had build a whole enginefamily. The first engine for example has 86mm to 86mm in a inline4 so i got a 2L-engine. i build it up to be near before the valvefloat will decrease my engines reliability.
then i build the next smaller engine of the Family. decreased the bore and stroke for a 1.6L-engine but the valvefloat isn’t better. is the valvesize still the same like the 2.0L-engine in this Family?

question:
does the game ignore valvesize or valvefloat (the whole stuff, you know what i mean) if i decrease boresize in a Family?

Sparky

2

Port size and valve size is kept constant within a Family of engines. That is deliberate as it is considered to be a major engineering aspect that should not easily be changed in between engines of the same family. :slight_smile:

3

That sounds Logical. Why does i can’t increase the Bore a bit in a Family? i know, the cylinderwalls get thiner and the cooling is maybe less effective but it is a simple Tuning and allows me to get a middle sized valve over the whole Family. to unlock the slider for bigger bore (with limitations) should not be to hard to implement. the Coolingeffects you can ignore at this Point. It’s a Detail but it would help in valvesizing in a Family.

Sparky

4

Easy answer to that: it would be an exploit and thus tedious for gameplay. Only the family changes size, so in that case you would always want to up-bore in the variant tab to get the most out of the engine - that would be really bad.