Originally Posted by RFSchaller
Julian, was there any spiking of fuel flow or pressure that might indicate vapor lock?
Am I reading the graph right when it looks like your MAP is dropping? Is it a cause or an effect of the loss of power. I can't figure out what would cause it to drop as a cause unless the air flow was some how restricted and that doesn't seem feasible.
I have the same question - I don't understand how a fuel flow obstruction could cause such a remarkable drop in manifold pressure. It is my understanding that a loss of RPM due to fuel or spark should cause a rise in MP (the same way it behaves when you cycle a constant speed prop during runup).
UPD: oops, forgot it's turbocharged.