It's about a 15 minute trek from where you'll land on DL31 (the satellite) over to E. When coming out of the Satellite tunnel, bear to the right, take the escalator to the main departure hall. Go left by Gates A1-A6, exit the secure area there, bear to the left and go up another escalator. Go all the way down that hallway until you hit Terminal E. Main security checkpoint in E will be a zoo at that time of day, so go all the way to the left by the NW check-in counters and clear security down there - should be a lot faster. Then you'll make your way back to Gate E3, which is where the AMS flights leave from.

Hour might be pushing it...can you SDC to an earlier DL flight?