Thanks a bunch TwinBoom.
... Dang, it's not in there either. I guess it was from way back in another early sound pack or something. I remember using that engine sound on the very first day the 190D and 152 came out. It sounded a lot like one of the F4U engine sounds, really overmodulated and pretty low pitched.
Are you sure this is the first Mitsu pack? The La7 sound isn't the one I remember either.. That La7 engine sounded like an angry bee. Really high pitched like cartoonish, not more realistic like this one.