Wally,
Overall, your data shows you are rich. Attached is your averaged BLM history table and counts. There is a good thread by Eaglemark here that goes through the steps to use the tuning spreadsheet . http://www.gearhead-efi.com/Fuel-Inj...-data-Tutorial! He uses the $0D mask in the tutorial but the spreadsheet has a sheet for $42 which is what you are using with the 7747. The links to the spreadsheets are in the tutorial thread. If you have Microsoft Excel on your PC, you can load the data from this history table and get closer with your tune. If you do not have Excel, you can download OpenOffice and use the OpenOffice Calc program. OpenOffice is an open source Office suite. http://www.openoffice.org The thread should explain the process fairly well. Just remember to keep up with your changes by changing the name each time you adjust something in the bin so you can go back if something gets worse after an adjustment. I always write down the name of the bin and take notes about how it runs etc.
Hope this helps,
Brian
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