Valvespring at 7000 RPM

Nascar engine from 7 years ago. 7000rpm with a .700 cam lift.

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Overhead Cam at 14K RPM
This video shows an operational cutaway of a BMW S1000RR — a 193HP superbike — bumping against its 14,200RPM redline. A cam and valvetrain at 118 cycles per second is an amazing sight (and sound)

High Perfomance valve spring testing 10K RPM
PAC Racing Springs in-house dynamics testing, utilizing a high performance SpinTron tester. This video shows a Nascar style performance dual spring. This spring shows good dynamic behavior even at 10,000 RPMs. The visual analysis is a useful tool to detect dynamic behavior of valvetrain components at extreme engine RPMs.

Inside a V8 at 1000RPM
Partially rebuilt GM Holden HQ 253ci (4.2L) V8 being tested for oil pressure. No valve gear or heads, but lifters sitting in place above the camshaft. Built for learning / enjoyment only, not my usual profession, so I don't claim to be an expert :-)

Blackstone oil engine startup
1909 10HP Blackstone oil engine was used for pumping water from a river to a market garden. The engine was sabotaged in the 1920s by someone blowing up the cylinder with explosives. A new cylinder was installed and the engine was returned to service for a number of years when it eventually fell into disuse. A number of river floodings submerged the engine and it was eventually partially buried in silt. It was recovered in the 1990s and in 1997 it was dismantled, cleaned and started again after many years of neglect. The starting procedure requires heating of the hot bulb with a blow lamp in order to vaporise the fuel ( kerosene ) and to preheat the internal combustion chamber to allow fuel ignition.