I did this to my old hotrod in high school. Used a spark plug in the breather pipe hole in my valve cover.
We were goofing around one day in shop class and added the plug wire. A little while later another student walked past, noticed it and asked about it. I told him that it was a supercharger and man this thing hauls azz whenever I kick in that ninth plug. He was like REALLY, WOW . All my buddies in shop had a good laugh.
I know the "VOICES" aren't real but they have some great ideas.
1999 Sport 400 2x4
Complete rebuild w/Wiseco piston by Todd Kerby, Comet clutch, Swamplites front & rear, 03 Predator Rear Hubs,
ITP Pro Baja Wheels (4x156 front & rear), DG Front Bumper, Fuj Rear Grab Bars and RZR Belt