Widebar has some good advice, I came across this and thought it might be helpful.
http://www.cyclechallenge.com/pdf/en..._nutrition.pdf
I haven't done any long races in quite a long time but I used to eat spaghetti, bread and a salad no dressing the night before then breakfast would be a big bowl of frosted mini wheats and a couple of bananas, handful of supps (calcium, magnesium, all the B vitamins, etc.) and at gas I would eat power bar and another banana.
I have recently been using whey protein drink before and after a ride and have noticed in my case limited muscle aches and faster recovery and Iv'e mentioned it before but have found taking a product by muscletech "Gakic" to be helpful as well, it seems to help with the lactic acid in muscles and also recovery time is better. Some of the longer tougher races I would have problems with the old lactic acid build up then the ride would go into survival mode.
As always try different stuff when training to see what agrees with your system rather than race day.
Good Luck
Ron
2004 ECDE2004