Hi there,

I am trying to learn how to "read" the parts of my engine after a run. Itīs a Nova Flash after two days racing at Lostallo. This particular track has an extremely long straight (7 sec full throttle). Question to the experts: If you look at the pictures, is there something I have to take care of before I run the engine next time on this track? The parts look a little bit different compared to when I checked them last time. Are those tiny spots signs of pre-detonation? I think the engine was not too lean, because I could hardly make 5mins. My friend told me to use a 8 plug instead of a 7, or put a 0,1mm shim more under the head.
Looking forward to hearing your thoughts!

Later, Stefan