Lets say I make a lot of content for my site, lots of spinned articles and then replace them with something else. Will that make my rank go down?
Why do you want to delete content? I recommend not doing so as Google likes a site with lots of content, you dont have to link to them from the home page so the chances of people finding them are small. If people find it from searches then you definatly dont want to delete it...dont pass up free traffic of any kind.
I just read what you said again, If you want to "replace" those articles, just write new ones and keep the old ones there. Its all niche related so it will back your serps up. As long as its not dupped then you would do better to keep it.
if you replace the entire content with something else, then you will more than likely see a flactuation in your ranking. minor content change would not make a difference but we are talking about replacing the entire content. only do it if you must
hey I did changed the entire content of the page which had 10 position in google...and now its not even in first 100 ..what to do???