OK, I am ready to take the "go the newby thread" comments, but I can't find them in my searches so....what is the breakdown of the injector classification numbers. Meaning what does the 160/30 , 175/146, 300/200 etc... mean? I have tried to search but have come up empty. I have an engineering degree and am no where near an expert but probably wouldn't be classified as wet behind the ears either. HELP? I think I can do more but want to be sure I know what I am doing. Thanks.