Maserati wrote:MBT, LBT. PI pionts or BLD
these mean what exactly?
Minimum Best Timing for best torque as in spark advance
Lean Best Torque as in mixture prep
Pre Ignition as in piston hot spots or mini flame fronts
Boardline Det. Cylinder pressure trace starting to become jagged on histogram decent.
There are conditions on an engines rev range where MBT is lower than BLD which is good and other times where BLD is lower than MBT which is not good for torque development or the engines life. care must be taking for the latter a.k.a knock detection.