So, to my original question... How did Rotax find the extra 20HP? Here is a link to a Kit Planes video from Sun'N Fun that Rotax explains it all.
https://youtu.be/2UqDSkFT3yc
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So, to my original question... How did Rotax find the extra 20HP? Here is a link to a Kit Planes video from Sun'N Fun that Rotax explains it all.
https://youtu.be/2UqDSkFT3yc
To answer your question….more boost! Larger exhaust to handle the increased back pressure. I know he said they changed things electronically….ie turned the boost up. Surprised they didn’t go with a bigger turbo.