how to calculate steering lock and steering ratios

[malks]

hi does someone know the basics of how this works,its got me bamboozled at the moment,and could you explain in simple laymans terms,if you have the steering wheel set at say 540 degrees what would the equivalent be in the wheel lock i know this probably varies from car to car,is there anywhere i can find charts to show all the different race car values, tried searching on the net but to no avail,probably just not putting in the proper description to find what im looking for,

hope you can make head and sense of all this
maybe i should have posted this question in the virtual racing part of the forum

regards Malks,