Put a muffler on it before starting again, and break it in if its a new cam. Read up on break-in procedures if you are unsure of what to do. If this was a race engine with a radical cam, you could almost bet the farm the cam was bad already! It only takes a few minutes to round off a cam lobe or two. At least tell me you have a oil additive like EOS or Comp Cams Zinc additive in the oil.
Joe
