Grass will make engine temps go up. You are prob running it full out a lot too which causes engine temps to also go up. Thats why I like the track. I had a buddy ask me why we couldn't tune on the street and well its just pointless to fine tune an engine that will be run on the track in the street. I dont like driving the race/ track cars on the street. Now the E max thats a different story, perfect for the street or park.
