FWIW: I found it much easier to eat the same amount every day than eat more on training days and less on rest days during routine training. I gorge less on riding days and get much less ravenous on rest days. For example, I figure 1800 x 7 days + 600 cal/hr x 10 hrs training/wk is 2650/day. I do play with the timing a bit to ensure enough energy for training, and try to east some protein and carbs soon after riding to assist with recovery, but still stick with the daily calorie limit. I do jack up the calories appropriately ahead of big rides or races.