automationgame.com

There should be a toggle or option on changing the valve dimensions for fuel and exhaust to emulate some of the popular aftermarket cylinder head brands.

lol just noticed viewtopic.php?f=14&t=2868 on head customization and choice of intake manifolds.
maybe if you could pick predesigned cylinder heads and intake manifolds instead of sandboxing them. I forgot the programming behind this game could take alot to accomplish what im asking.

It wouldn't be too hard to do from a cacluation point of view, but we just don't want to make engine design much more complicated than it already is.

It already automatically makes the valves as big as possible (for the valve count and bore size you've selected)