there is info out there for large scale you wont find much here .or it will take awhile for someone to respond .
Here is a good thread post from another forum
http://www.bajaaddicts.com/showthread.php?t=6911&page=2
it may not work till you sign up
or try this one
http://www.wiseco.com/Calculators.aspx
lots of info out there just have too look around an do some reading.