Though this is an old post. Think you mean SSL for your site? And ranking in Google?
Unless it has changed recently I have not seen SSL make a difference in ranking. They kept talking about influencing ranks, but didn't make a difference with me. Course there are always people who don't know, talking like they do, or just repeating what the last jughead said. The SSL myths :)
Also think it is another G scare to get people to do some thing.
I have run with one for years, then stopped for a while, not difference either way. Sure not going to boost you to the top if you get one.
I have one these days just for my customers piece of mind. Plus, most browsers give a warning now, don't want to lose sales because people get scared off by the browser. "Oh no, bad place, you don't want to go there". And I have one just in case it has any impact on ranks.
Just my long winded opinion.
Funny though, been seeing IM products lately, about scaring local businesses into getting SSL.