Jeff and Brian, you both have a situation that wasn't handled well by the spreadsheet. In both cases the HP/Weight is less than 8.0. GT/A is from 8.0 to 8.49. When the weight break was less than 8.0 the spreadsheet didn't know what to do. I made some changes and there is a new version at:
http://www.employees.org/~bhracing/g...ulator_1p1.xls
This version will flag combinations that have breaks below 8.0 and also shows the calculated weight break.
Thanks for the feedback. You fast guys always break things..!!