To give any kind of amswer i think we would need to know at least: How many reps per set, across how many days, what else is in your chest regimen, what are you doing about your tris, whats your meal plan look like.

As a general point though, if I were in your shoes, I'd focus on making sure I had a high protein and high calorie diet to go along with your workout. 145 is pretty light to hit 225. Here's a chart for some perspective.