Tool, plugin to ping all post of a wordpress site or drip them somehow

I have a site with 5000 post/products I want to get these posts indexed by pinging them all just like they would ping if i were to create/update them. Is there a tool that would auto ping x posts/products a day or somehow update 500-1000 posts a day so they would get pinged?

Or what would be the fastest way to get a 5000 pages site indexed without submitting sitemap to google (i've had bad experience with, probly cause this is a grey/blackhat site)

If your site's content is unique and Copyscape passed , you should have no problems submitting a sitemap to Google and get them indexed very fast. If you want to ping all your posts then get a list of them and use any bulk ping online tool.