Look at Van's Blather here.
Kyle Boatright wrote:
In talking with Van's, they really thought they would have quite a few
customers for the RV-9 who would use the 0-235 or 0-290. Sure, there are a
few, but there are far more guys bolting on the 0-360 @ 180 hp, which is 20
hp more than what Van had in mind when he designed the airplane.
And now there's an O-340 out there that puts out 190 hp. Oh the choices.
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