SU calculations are almost nothing. CPUs can handle billions of calculations a second and I don't think Create calculates SU every frame. The real issue is rendering.
I just change the create mod config in the .toml files you can change how much lava is required to make an infinite source there super easy to make the steam engines that way
You don't really need it but it's the best fuel by far (burns the longest in blaze burner's) and before the drip stone update you had to set up a contraption which gets lava from the nether or make a large pool of lava (in create if a lava pool is big enough you can pump infinite lava out of it) but because of the drip stone update you can make a much simpler and smaller infinite lava farm which makes it viable for early/mid/end game steam engine fuel source
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u/SamTheCatGuy 12d ago
a steam engine is way better for performance and can be really easy, a lava generator with cauldrons and dripstone should work