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diesel_john · 05-06-2009, 11:05 PM

I am surprised that the sweet spot is located at so little advance for 1500 RPM.

So we can advance the timing because the EGR slows the combustion rate.

roflwaffle, on the mechanical NA rabbit pump, when the fuel is increased rapidly at low speed, does the injection duration increase? If so, does it start the injection earlier or end it later? Can the mechanism retard the timing under heavy load at low RPM? To ask another way, how does the mechanical pump adjust timing based on RPM and load?

05-06-2009, 11:05 PM	#30 (permalink)
diesel_john MP$ Join Date: Jan 2008 Location: SW Ohio Posts: 595 Thanks: 5 Thanked 19 Times in 14 Posts	I am surprised that the sweet spot is located at so little advance for 1500 RPM. So we can advance the timing because the EGR slows the combustion rate. roflwaffle, on the mechanical NA rabbit pump, when the fuel is increased rapidly at low speed, does the injection duration increase? If so, does it start the injection earlier or end it later? Can the mechanism retard the timing under heavy load at low RPM? To ask another way, how does the mechanical pump adjust timing based on RPM and load? Last edited by diesel_john; 05-07-2009 at 12:34 AM..