Originally Posted by Trimix
Thats cool. How did they get the camera in there then. They must have drilled a hole in the top of the chamber !
Looks like it could also do with some head work. It clearly shows how the fuel/air mix really dosent spread evenly and you can see a concentration of flame on the unburnt parts just before the exhaust opens.
Possibly an aero engine and they've used the second spark plug as a place to screw the camera into....which could explain the poor burn pattern (as they're designed to have a twin spark) the engines in smart cars also run twin sparks...