Performance Timing Table Chevy 5.7 Liter TBI ECM 1227747

[dave w]

Ahhhhh? You built that in a mask/XDF that does not take out the "SA - Spark Bias - Main"

So if someone add's that table to my $42 XDF it will be 9.84* to much!

Below are a couple screen shots showing the same timing table, one with the $42 TunerPro website .xdf and Marks V5.9.2 .xdf.

dave w

[EagleMark]

[tolow4phathoes]

Sorry not trying to be a noob haha. But If I add that table to the bin I have downloaded from this website which happens to be the ones you guys mention. My tables should look like the first pic? And if using the bin from tunerpro website it should look like the second pic?

[EagleMark]

Bin is the same. The issue is the XDF from this website automatically removes the Spark Bias so what you see in spark Advance table is actual timing. Not timing with 9.84 degrees added to it. (if small block, if big block there is no bias so any XDF will show actual timing)

[tolow4phathoes]

Bin is the same. The issue is the XDF from this website automatically removes the Spark Bias so what you see in spark Advance table is actual timing. Not timing with 9.84 degrees added to it. (if small block, if big block there is no bias so any XDF will show actual timing)

Sorry still a lil confuse, please bear with me. But why is there a big timing difference between the two tables?

[dave w]

Sorry still a lil confuse, please bear with me. But why is there a big timing difference between the two tables?

The .xdf file can be configured to display the spark table in several ways. The "Spark Bias" parameter can be subtracted in the (if the .xdf author so desires) and that's why there is a difference between the two .xdf files.

dave w