Since the newest UE4 open beta update, I’ve been trying to rebuild engines. I can’t seem to get the bore x stroke numbers to match up with what the CID or LD should be. A 4.00" X 3.75" V8 engine in the game comes up as 376.1 CI when it should be 377. A 4.25" X 3.75" engine comes up as 425.0 instead of 425.6. Changing to metric seems to make it worse, a 101.6x95.3 engine (as best I can tell since we don’t get decimals past 100) comes up as 374.2ci when it should be slightly larger than the 4"x3.75" engine. and the 426 shows up as 421.8…

Am I missing some rounding here? I’m using the normal displacement calculation (bore/2)^2 * stroke * PI * cyl count.

Also, is there a way we can type in bore/stroke numbers instead of using the slider?