Y axis for fuel and ignition table

Hi,

When tuning the fuel and ignition table, what item I should use for the Y axis, MAP or TP? In the road tuning example MAP was used as Y axis but in the dyne tuning example TP was used. What are the differences? Thanks!

Richard

Typically in most cases we would use MAP as the load axis. The only times that we would use TPS is for an engine fitted with individual throttle bodies or if we have an engine with very aggressive cams that produces very little vacuum at idle.