Yeah i changed the conrod 2 times (8 bucks for a conrod and they are almost disposable). My temps where ranging from 110-125 depending on track and conditions. It started to warp speed at the higher temps and never sounded lean but it makes me a bit nervous to get to close to the lean overheat. I always have this battle in my head of: man the engine sounds good and is very fast but maybe it is too lean and i back it off a bit. The plugs always looked good though. I guess i should just get rid of my temp gun and trust plug reading and sound tuning.