A boxer 8 I made based on the Porsche 908 engine to a lesser extent. Modified on 8/29/25.

A major 3rd firing interval V18 I researched and made. You can learn more from the video description on YouTube. Mod...

A perfect 4th firing interval V14 I made. You can learn more from the video description on YouTube. Modified on 8/29...

A perfect 5th firing interval V10 I made. You can learn more about it in the details from the YouTube video. Modifie...

A major 3rd firing interval Inline 9 I made and researched. Learn more in the YouTube video description on the site. ...

A perfect 4th firing interval Inline 7 I made. Learn more in the YouTube video above. Modified on 8/29/25.

A perfect 5th firing interval Inline 5 I made. Learn more in the YouTube video above. Modified on 8/29/25.

More details and credits in the YouTube video description. Modified on 8/29 for additional realism.

See more about it on the YouTube video description. Modified 8/29 for additional realism.