Ignition timing vs Boost vs Power

[Martin]

Maybe someone will find this interesting.
Graph of base igntion map then -3deg, -6deg, -9deg, -12deg, -15deg, -18deg, -21deg
No boost control was done. Its just open loop DC with a boost reference. DC in all runs the same.

[stevieturbo]

They are pretty hefty jumps in timing though.

And it's annoying the way this forum puts pictures into separate small windows.

[fel1979]

Nice Martin, Is really good to have this kind of comparison.

[jasaircraft]

Not sure what I see here, the lower manifold pressure line is making more power? and its the most retarded timing?

[Holmz]

Would having EGT with those other curves complete the story?

[Martin]

What you are seeing....
Most timing, Most power, Least boost
Less timing = Less power = More boost (this is the case for each of the graphs, -3. -6, -9, etc....)

Yes, EGTs would have been good. Cylinder pressure with TDC reference brilliant.

[jasaircraft]

Oh ok i see how egts would have been great to relate it to the boost, pressure/ tdc to power output aswell...

[pftuning]

What you are seeing....
Most timing, Most power, Least boost
Less timing = Less power = More boost (this is the case for each of the graphs, -3. -6, -9, etc....)

Yes, EGTs would have been good. Cylinder pressure with TDC reference brilliant.

Make sense to me. Nice illustration, Martin.