When I lost my 40 pounds to get into cycling shape, I made sure to keep it around 1400-1600 kCals a day. I tried to eat a lot of protein and vegetables but for the most part it was a numbers game. When you do a 4 hour ride hitting that number isn't easy. Now I am trying to get down another 10, which is tougher as my discipline is a tad bit off.
Hit new power highs again on tired legs. For my weak legs it is all about the numbers. My last race not having the power to stay attached to a break cost me. Since coming back I've had 3 small injuries that set me back but now it looks I'm well on my way.