How to get best conversion on Rye Mash

[jermerqua]

I'm new and probably not too wise since I decided to start making Rye. I am clearly not getting great conversion. This last batch I ended up with about 4 gallons with an ABV of about 4%... and I added about 3lbs of sugar before pitching yeast in. I just feel as though I am doing something wrong during mashing that is limiting my ability t0 extract as much sugar as possible. Is there a forum post someone can link me to that is like the bext way to do a rye mash and maximize conversion and subsequent ABV? Thanks