im sorry if this is a repost, i was watching home improvment and they were talking about V8s. they had this little tiny one. so i looked for it on the internet. i found them
http://www.conleyprecision.com/
they are tiny V8s with 3.4 horse power. its amazing just to think how small the pistons are and the water pump. and it all works and it can fit in your hand. you can add a blower, bigger radiator, diff water pump, carbs, and pistons for higher compression. they also have a V10 viper motor that only one was made because they built it, then the building burned down melting all the molds. they want $250k for it. but just $4.5k for the little V8. i just think it is amazing how they can do that and would share it with you all