Seeing as this is most relevant thread I thought I'd add this here. For those that have been wondering how to do the PI/DI scaling. This is a spreadsheet tool I've put together:
https://dl.dropboxusercontent.com/u/...libration.xlsx
If you have any form of MAF scaled maps, use that to create 2 identical maps. 1 with 100% PI and the other with 0% PI, although I leave the standard ratio above 5200. Go and log data on each as if you were doing CL scaling.
On my tool, input the MAF scale and use this for @
vgi's tool as well. Then copy the corrected MAF scale (only the g/s with no smoothing) into my spreadsheet for both DI and PI results into the New PI/DI columns and voila....
As the MAF tool adjusts all values below the lowest recorded MAFv by the same correction factor, I find it's best to remove any duplicate error values in the low RPM range. Then use the % difference chart to work out where to set the max and min range as to avoid erroneous data having an impact on the injector scalar. You then can select which injector set to adjust if necessary. I would choose the range with the most positive trims/error, or whichever is the higher line on the graph. I would always look for the ideal correction to be at the higher voltage range as at lower voltage the PI system can have latency error as well. This will become obvious if the lines drift apart or get closer the nearer you get to 0v.
I've also included a couple of columns for you to paste the DI fuel rail pressure for any adjustments you may want to make later.
The last 2 tabs are for you to keep an eye on how much MAF variation your map has from the OEM map. This will allow you to see if there are other issues, like if you're bumping up the whole curve etc. Paste your MAFv range into the OEM adjusted column and it will calculate the correct g/s. Then paste your current scale into the current ROM columns.
Any questions then please ask.