How will the success of my previous projects affect future funding?
While a common practice, that would be fraud. 
Less fraudulent would be to bill everything that 'counts for both' to the stronger project, to conserve money to get the weaker projects done. (Equipment, staff meetings, etc). 

For you, depends on how your department weights grants brought in vs. papers published. If they value grant money more, that you've damaged your chances of getting more is not something your should reveal, while papers are something you can play up.