Here is a link for the Lincoln Stick Electrode Guide. I have had a copy for years, and I picked up another one from my LWS a month back. I realize that most people know what temp to run their favorite rods, but it seems I read on the other boards where newbies are attempting to run a 1/8 rod at 90amps. They give them away at your LWS, but here is the pdf for download. When I was in welding school at Lincoln we took a test on this book! This is a good free resource for newbies and will get you in the ballpark.
http://www.lincolnelectric.com/asset...ture/C2410.pdf