Do push up's increase ur bench press?

Your chest will get pumped but that is called sarcoplasm. and this type of hyeprtrophy is known as sarcoplasmic hypertrophy as opposed to myofibrillar hypertrophy. This means that the non-contractile protein of the muscle is being filled with blood and other stuff ,but the contractile proteins and fibers are not gaining the ability to generate more tension which basically means you are getting pumped and increasing you muscular endurance but doing almost nothing for maximum strength as well as explosive strength. SO with that being said , no they don't but the fact that you are training both max strength as well as muscular endurance means that you have both qulities down pat and I don't know why youa re even asking this becasue at a 405 Bench press you are leaps and bounds above most people I know. If you wnat explosive chest strength work on clap pushyups , power overs and pushing up to raised paltforms to gauge power output and also so if you can't reach the platform than you should end the set. Ste high enough you are barely getting 5-8 reps. For explosive pull-up power master the muscle-up ona pull-up bar. Also set a ladder on an incline and get creative.As for only being strong in the wieght room, when you reach a certain number such as a 405 bench I imagine you ahve plenty of carry over. Just work the othe lifts equally as hard and throw in some conditioning that blends strength aspects like sled dragging, and sledgehammer training. Also rope climbing and such. Heavy bags are great conditioners as well. Peace and love be with you.