I got some favourites, a few before bed.
1951 they could make 600hp from 1.5ltr engine. Pretty mazing. V16 with RR supercharger. After the start skip to around 2:00 It's a big track, most of the vid is the sound of the car round the far side...
#t=119s
An aussie stuck a V12 merlin engine in a hydroplane, and won every race he entered. Aggressor:
This is a slightly modified R1 Yamaha 1ltr bike engine racing in italy. Also won a lot in a tiny car shell. Wet track oversteer monster. Great note echoing round. I think these rev limit at 14,000 rpm from the factory, easy to go more if you put in some stronger valves etc and override the CPU.
I'll find some more tomorrow...