Undersyanding Charts

[crazycumminz]

Such as timing base. Rpm (down) understand / mm3 (CMDfuel) (across) 0.0 - 140.0+ means what? The adjustable cells is degrees. Max 22-25* more questions on other charts. Help please? Thanks, Kevin

[2007 5.9]

In each cell the ECM references that timing value at those mm3/rpm intersects.