Ls3 to ls1 injector spreadsheet?

[Kevinmallahan]

Anyone have a spreadsheet for ls3 injector data for gen3?

[dhoagland]

This should do it

[blindsquirrel]

...and that only really works for early 63lb-limit Gen4s. The axis labels don't match if you're using late 127lb source data.

[dhoagland]

...and that only really works for early 63lb-limit Gen4s. The axis labels don't match if you're using late 127lb source data.

Oh, Good to know
Thank You…

[blindsquirrel]

Hence the reason for learning how to do the conversions manually and not rely on the spreadsheet. It takes time and it's annoying but it's not hard.

[dhoagland]

I’m going to need do that…

[blindsquirrel]

These tiny parts of the Gen4 tables are literally the only data that gets used in a Gen3 file. The other parts are just there to make your head asplode.

01 prep.png

There is no math needed, it's all CTRL+C/CTRL+V (A LOT OF CTRL+C/CTRL+V) then interpolating across the empty spots.

03 IFR cells.png

09 offset mid-point.png

And it's even easier if it's a referenced regulator, that only uses one single column from the Gen4 data.


The short pulse adder is its own special kind of hell, but again it's just pasting what lines up and interpolating the rest. And comparing the shapes in 2D mode helps for final tweaking.

17 short pulse adder 2D compare.png

[Kevinmallahan]

...and that only really works for early 63lb-limit Gen4s. The axis labels don't match if you're using late 127lb source data.

Sorry for my ignorance but what?s the difference and how do I know what I have?

[blindsquirrel]

Go grab a pre-2009 Silverado file and a post-2009 Silverado file from the repository. Open each one in its own editor window and compare the axes for the injector flow rate tables. Early files go 400-416-432-448-464-480, which matches the spreadsheet labels. Late files go 408-428-448-468-488, which does not match the labels in the spreadsheet (you might also note there are a different number of cells in there, 6 vs 5).

[Kevinmallahan]

Thanks for taking the time to explain. This is all new to me.