![]() May God's grace bless you in the Lord Jesus Christ. Once you have a basic curve, you can tweak it to take advantage of non-linear timing "curves" possible when an ECU controls timing. The Spreadsheet creates the 31x31 Timing Table and you copy it (without the Yellow axes) into your 2D Timing Table in the Spark menu. You can change these with basic Spreadsheet skills if necessary in the Excel file.īasically you input into the Green cells your desired Initial Timing, "Mechanical" Advance amount (and Start & Stop RPM), "Vacuum" Advance amount (and MAP Start & Stop). Justin's original post also cautions to make sure that the MAP & RPM axes have the same scale as your Sniper GFC. This is useful to input vacuum canister specs from conventional tuning information to your new Timing Table. My version, called "Holley EFI Timing Table Generator", provides an input to convert Vacuum (in inches of Mercury) to MAP, type the inHg value in the Green cell and MAP is output below it. ![]() However this Excel file gives you a Timing Table fast that you can edit later. The Holley video showing how to create a curve is very informative about how to manipulate any table via the Holley EFI software, I learned more by practicing on various GFC and Datalog files that I found online. The basic Ignition Timing created by the Sniper Wizard is very abrupt. If you don't have MS Office, I recommend the freeware "LibreOffice" which you use as a Portable App or install. I have changed it slightly to make the inputs more explicit, but what it does is allow you to "curve" a distributor virtually then paste the result into the 31x31 Timing Table. Lloyd who generously posted it for download. Here's an Excel file based on a very useful tool that I found in the Holley Sniper users Facebook group. I searched the Holley Forums for similar info, but found none.
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